Functional magnetic resonance imaging (fMRI) has shown language processing to also involve the third part of the inferior frontal gyrus the pars orbitalis, as well as the ventral part of BA6 and these are now often included in a larger area called Broca's region.
Studies of chronic aphasia
have implicated an essential role of Broca's area in various speech and
language functions. Further, fMRI studies have also identified
activation patterns in Broca's area associated with various language
tasks. However, slow destruction of Broca's area by brain tumors can leave speech relatively intact, suggesting its functions can shift to nearby areas in the brain.
Structure
Broca's area is often identified by visual inspection of the topography of the brain either by macrostructural landmarks such as sulci or by the specification of coordinates in a particular reference space. The currently used Talairach and Tournoux atlas projects Brodmann'scytoarchitectonic map onto a template brain. Because Brodmann's parcelation
was based on subjective visual inspection of cytoarchitectonic borders
and also Brodmann analyzed only one hemisphere of one brain, the result
is imprecise. Further, because of considerable variability across brains
in terms of shape, size, and position relative to sulcal and gyral
structure, a resulting localization precision is limited.
The differences between area 45 and 44 in cytoarchitecture and in
connectivity suggest that these areas might perform different
functions. Indeed, recent neuroimaging
studies have shown that the PTr and Pop, corresponding to areas 45 and
44, respectively, play different functional roles in the human with
respect to language comprehension and action recognition/understanding.
The Broca's area is about 20% larger in women than in men.
Functions
Language comprehension
For
a long time, it was assumed that the role of Broca's area was more
devoted to language production than language comprehension. However,
there is evidence to demonstrate that Broca's area also plays a
significant role in language comprehension. Patients with lesions
in Broca's area who exhibit agrammatical speech production also show
inability to use syntactic information to determine the meaning of
sentences. Also, a number of neuroimaging studies have implicated an involvement of Broca's area, particularly of the pars opercularis of the left inferior frontal gyrus, during the processing of complex sentences. Further, functional magnetic resonance imaging (fMRI) experiments have shown that highly ambiguous sentences result in a more activated inferior frontal gyrus.
Therefore, the activity level in the inferior frontal gyrus and the
level of lexical ambiguity are directly proportional to each other,
because of the increased retrieval demands associated with highly
ambiguous content.
There is also specialisation for particular aspects of comprehension within Broca's area. Work by Devlin et al. (2003) showed in a repetitive transcranial magnetic stimulation (rTMS) study that there was an increase in reaction times when performing a semantic task under rTMS aimed at the pars triangularis
(situated in the anterior part of Broca's area). The increase in
reaction times is indicative that that particular area is responsible
for processing that cognitive function. Disrupting these areas via TMS
disrupts computations performed in the areas leading to an increase in
time needed to perform the computations (reflected in reaction times).
Later work by Nixon et al. (2004)
showed that when the pars opercularis (situated in the posterior part
of Broca's area) was stimulated under rTMS there was an increase in
reaction times in a phonological task. Gough et al. (2005)
performed an experiment combining elements of these previous works in
which both phonological and semantic tasks were performed with rTMS
stimulation directed at either the anterior or the posterior part of
Broca's area. The results from this experiment conclusively
distinguished anatomical specialisation within Broca's area for
different components of language comprehension. Here the results showed
that under rTMS stimulation:
Semantic
tasks only showed a decrease in reaction times when stimulation was
aimed at the anterior part of Broca's area (where a decrease of 10%
(50 ms) was seen compared to a no-TMS control group)
Phonological
tasks showed a decrease in reaction times when stimulation was aimed at
the posterior part of Broca's area (where a decrease of 6% (30 ms) was
seen compared to control)
To summarise, the work above shows anatomical specialisation in
Broca's area for language comprehension, with the anterior part of
Broca's area responsible for understanding the meaning of words
(semantics) and the posterior part of Broca's area responsible for
understanding how words sound (phonology).
Action recognition and production
Experiments
have indicated that Broca's area is involved in various cognitive and
perceptual tasks. One important contribution of Brodmann's
area 44 is also found in the motor-related processes. Observation of
meaningful hand shadows resembling moving animals activates frontal
language area, demonstrating that Broca's area indeed plays a role in
interpreting action of others. An activation of BA 44 was also reported during execution of grasping and manipulation.
Speech-associated gestures
It
has been speculated that because speech-associated gestures could
possibly reduce lexical or sentential ambiguity, comprehension should
improve in the presence of speech-associated gestures. As a result of
improved comprehension, the involvement of Broca's area should be
reduced.
Many neuroimaging studies have also shown activation of Broca's
area when representing meaningful arm gestures. A recent study has shown
evidence that word and gesture are related at the level of translation
of particular gesture aspects such as its motor goal and intention. This finding helps explain why, when this area is defective, those who use sign language also have language deficits.This finding, that aspects of gestures are translated in words within
Broca's area, also explains language development in terms of evolution.
Indeed, many authors have proposed that speech evolved from a primitive
communication that arose from gestures.
Speaking without Broca's area
Damage
to Broca's area is commonly associated with telegraphic speech made up
of content vocabulary. For example, a person with Broca's aphasia may
say something like, "Drive, store. Mom." meaning to say, "My mom drove
me to the store today." Therefore, the content of the information is
correct, but the grammar and fluidity of the sentence is missing.
The essential role of the Broca's area in speech production has
been questioned since it can be destroyed while leaving language nearly
intact. In one case of a computer engineer, a slow-growing glioma tumor was removed. The tumor and the surgery destroyed the left inferior and middle frontal gyrus, the head of the caudate nucleus, the anterior limb of the internal capsule, and the anterior insula.
However, there were minimal language problems three months after
removal and the individual returned to his professional work. These
minor problems include the inability to create syntactically complex
sentences including more than two subjects, multiple causal conjunctions, or reported speech. These were explained by researchers as due to working memory problems. They also attributed his lack of problems to extensive compensatory mechanisms enabled by neural plasticity in the nearby cerebral cortex and a shift of some functions to the homologous area in the right hemisphere.
Aphasia
is an acquired language disorder affecting all modalities such as
writing, reading, speaking, and listening and results from brain damage.
It is often a chronic condition that creates changes in all areas of
one's life.
Expressive aphasia vs. other aphasias
Patients with expressive aphasia, also known as Broca's aphasia, are individuals who know "what they want to say, they just cannot get it out".
They are typically able to comprehend words, and sentences with a
simple syntactic structure (see above), but are more or less unable to
generate fluent speech. Other symptoms that may be present include
problems with fluency, articulation, word-finding, word repetition, and producing and comprehending complex grammatical sentences, both orally and in writing.
This specific group of symptoms distinguishes those who have
expressive aphasia from individuals with other types of aphasia. There
are several distinct "types" of aphasia, and each type is characterized
by a different set of language deficits. Although those who have
expressive aphasia tend to retain good spoken language comprehension,
other types of aphasia can render patients completely unable to
understand any language at all, unable to understand any spoken language
(auditory verbal agnosia),
whereas still other types preserve language comprehension, but with
deficits. People with expressive aphasia may struggle less with reading
and writing (see alexia) than those with other types of aphasia.
Although individuals with expressive aphasia tend to have a good
ability to self-monitor their language output (they "hear what they say"
and make corrections), other types of aphasics can seem entirely
unaware of their language deficits.
In the classical sense, expressive aphasia is the result of
injury to Broca's area; it is often the case that lesions in specific
brain areas cause specific, dissociable symptoms, although case studies show there is not always a one-to-one mapping between lesion location and aphasic symptoms.
The correlation between damage to certain specific brain areas (usually
in the left hemisphere) and the development of specific types of
aphasia makes it possible to deduce (albeit very roughly) the location
of a suspected brain lesion based only on the presence (and severity) of
a certain type of aphasia, though this is complicated by the
possibility that a patient may have damage to a number of brain areas
and may exhibit symptoms of more than one type of aphasia. The
examination of lesion data in order to deduce which brain areas are
essential in the normal functioning of certain aspects of cognition is
called the deficit-lesion method; this method is especially important in
the branch of neuroscience known as aphasiology. Cognitive science – to be specific, cognitive neuropsychology – are branches of neuroscience that also make extensive use of the deficit-lesion method.
Major characteristics of different types of acute aphasia
Newer implications related to lesions in Broca's area
Since studies carried out in the late 1970s it has been understood that the relationship between Broca's area and Broca's aphasia is not as consistent as once thought.
Lesions to Broca's area alone do not result in Broca's aphasia, nor do
Broca's aphasic patients necessarily have lesions in Broca's area.
Lesions to Broca's area alone are known to produce a transient mutism
that resolves within 3–6 weeks. This discovery suggests that Broca's
area may be included in some aspect of verbalization or articulation;
however, this does not address its part in sentence comprehension.
Still, Broca's area frequently emerges in functional imaging studies of
sentence processing. However, it also becomes activated in word-level tasks. This suggests that Broca's area is not dedicated to sentence processing
alone, but supports a function common to both. In fact, Broca's area
can show activation in such non-linguistic tasks as imagery of motion.
Considering the hypothesis that Broca's area may be most involved
in articulation, its activation in all of these tasks may be due to
subjects' covert articulation while formulating a response. Despite this
caveat, a consensus seems to be forming that whatever role Broca's area
may play, it may relate to known working memory functions of the
frontal areas. (There is a wide distribution of Talairach coordinates
reported in the functional imaging literature that are referred to as
part of Broca's area.) The processing of a passive voice sentence, for
example, may require working memory to assist in the temporary retention
of information while other relevant parts of the sentence are being
manipulated (i.e. to resolve the assignment of thematic roles to
arguments). Miyake, Carpenter, and Just have proposed that sentence
processing relies on such general verbal working memory mechanisms,
while Caplan and Waters consider Broca's area to be involved in working
memory specifically for syntactic processing. Friederici (2002) breaks
Broca's area into its component regions and suggests that Brodmann's
area 44 is involved in working memory for both phonological
and syntactic structure. This area becomes active first for phonology
and later for syntax as the time course for the comprehension process
unfolds. Brodmann's area 45 and Brodmann's area 47 are viewed as being
specifically involved in working memory for semantic features and
thematic structure where processes of syntactic reanalysis and repair
are required. These areas come online after Brodmann's area 44 has
finished its processing role and are active when comprehension of
complex sentences must rely on general memory resources. All of these
theories indicate a move towards a view that syntactic comprehension
problems arise from a computational rather than a conceptual deficit.
Newer theories take a more dynamic view of how the brain integrates
different linguistic and cognitive components and are examining the time
course of these operations.
Neurocognitive studies have already implicated frontal areas
adjacent to Broca's area as important for working memory in
non-linguistic as well as linguistic tasks.
Cabeza and Nyberg's analysis of imaging studies of working memory
supports the view that BA45/47 is recruited for selecting or comparing
information, while BA9/46 might be more involved in the manipulation of
information in working memory. Since large lesions are typically
required to produce a Broca's aphasia, it is likely that these regions
may also become compromised in some patients and may contribute to their
comprehension deficits for complex morphosyntactic structures.
Broca's area as a key center in the linking of phonemic sequences
Broca's
area has been previously associated with a variety of processes,
including phonological segmentation, syntactic processing, and
unification, all of which involve segmenting and linking different types
of linguistic information.
Although repeating and reading single words does not engage semantic
and syntactic processing, it does require an operation linking phonemic
sequences with motor gestures. Findings indicate that this linkage is
coordinated by Broca's area through reciprocal interactions with
temporal and frontal cortices responsible for phonemic and articulatory
representations, respectively, including interactions with the motor
cortex before the actual act of speech. Based on these unique findings,
it has been proposed
that Broca's area is not the seat of articulation, but rather is a key
node in manipulating and forwarding neural information across
large-scale cortical networks responsible for key components of speech
production.
History
In a study published in 2007, the preserved brains of both Leborgne and Lelong (patients of Broca) were reinspected using high-resolution volumetric MRI.
The purpose of this study was to scan the brains in three dimensions
and to identify the extent of both cortical and subcortical lesions in
more detail. The study also sought to locate the exact site of the lesion in the frontal lobe in relation to what is now called Broca's area with the extent of subcortical involvement.
Broca's patients
Louis Victor Leborgne (Tan)
Leborgne was a patient of Broca's. At 30 years old, he was almost completely unable to produce any words or phrases. He was able to repetitively produce only the word temps (French word for "time"). After his death, a neurosyphilitic lesion was discovered on the surface of his left frontal lobe.
Lelong
Lelong
was another patient of Broca's. He also exhibited reduced productive
speech. He could only say five words, 'yes', 'no', 'three', 'always',
and 'lelo' (a mispronunciation of his own name). A lesion within the
lateral frontal lobe was discovered during Lelong's autopsy. Broca's
previous patient, Leborgne, had a lesion in the same area of his frontal
lobe. These two cases led Broca to believe that speech was localized to
this particular area.
MRI findings
Examination of the brains of Broca's two historic patients with high-resolution MRI
has produced several interesting findings. First, the MRI findings
suggest that other areas besides Broca's area may also have contributed
to the patients' reduced productive speech. This finding is significant
because it has been found that, though lesions
to Broca's area alone can possibly cause temporary speech disruption,
they do not result in severe speech arrest. Therefore, there is a
possibility that the aphasia denoted by Broca as an absence of productive speech also could have been influenced by the lesions in the other region.
Another finding is that the region, which was once considered to be
critical for speech by Broca, is not precisely the same region as what
is now known as Broca's area. This study provides further evidence to
support the claim that language and cognition are far more complicated
than once thought and involve various networks of brain regions.
Evolution of language
The pursuit of a satisfying theory that addresses the origin of language
in humans has led to the consideration of a number of evolutionary
"models". These models attempt to show how modern language might have
evolved, and a common feature of many of these theories is the idea that
vocal communication was initially used to complement a far more dominant mode of communication through gesture. Human language might have evolved
as the "evolutionary refinement of an implicit communication system
already present in lower primates, based on a set of hand/mouth
goal-directed action representations."
"Hand/mouth goal-directed action representations" is another way
of saying "gestural communication", "gestural language", or
"communication through body language".
The recent finding that Broca's area is active when people are
observing others engaged in meaningful action is evidence in support of
this idea. It was hypothesized that a precursor to the modern Broca's
area was involved in translating gestures into abstract ideas
by interpreting the movements of others as meaningful action with an
intelligent purpose. It is argued that over time the ability to predict
the intended outcome and purpose of a set of movements eventually gave
this area the capability to deal with truly abstract ideas, and
therefore (eventually) became capable of associating sounds (words) with
abstract meanings. The observation that frontal language areas are
activated when people observe hand shadows
is further evidence that human language may have evolved from existing
neural substrates that evolved for the purpose of gesture recognition.
The study, therefore, claims that Broca's area is the "motor center for
speech", which assembles and decodes speech sounds in the same way it
interprets body language and gestures. Consistent with this idea is that
the neural substrate that regulated motor control in the common
ancestor of apes and humans was most likely modified to enhance
cognitive and linguistic ability. Studies of speakers of American Sign Language
and English suggest that the human brain recruited systems that had
evolved to perform more basic functions much earlier; these various brain circuits, according to the authors, were tapped to work together in creating language.
Another recent finding has showed significant areas of activation
in subcortical and neocortical areas during the production of
communicative manual gestures and vocal signals in chimpanzees. Further, the data indicating that chimpanzees
intentionally produce manual gestures as well as vocal signals to
communicate with humans suggests that the precursors to human language
are present at both the behavioral and neuronanatomical levels. More
recently, the neocortical distribution of activity-dependent gene
expression in marmosets
provided direct evidence that the ventrolateral prefrontal cortex,
which comprises Broca's area in humans and has been associated with
auditory processing of species-specific vocalizations and orofacial
control in macaques, is engaged during vocal output in a New World monkey.
These findings putatively set the origin of vocalization-related
neocortical circuits to at least 35 million years ago, when the Old and
New World monkey lineages split.
Health equity arises from access to the social determinants of health, specifically from wealth, power and prestige.
Individuals who have consistently been deprived of these three
determinants are significantly disadvantaged from health inequities, and
face worse health outcomes than those who are able to access certain
resources.
It is not equity to simply provide every individual with the same
resources; that would be equality. In order to achieve health equity,
resources must be allocated based on an individual need-based principle.
According to the World Health Organization, "Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity".
The quality of health and how health is distributed among economic and
social status in a society can provide insight into the level of
development within that society.
Health is a basic human right and human need, and all human rights are
interconnected. Thus, health must be discussed along with all other
basic human rights.
Health equity is defined by the CDC as "the state in which
everyone has a fair and just opportunity to attain their highest level
of health".
It is closely associated with the social justice movement, with good
health considered a fundamental human right. These inequities may
include differences in the "presence of disease, health outcomes, or
access to health care" between populations with a different race, ethnicity, gender, sexual orientation, disability, or socioeconomic status.
Health inequity differs from health inequality in that the latter
term is used in a number of countries to refer to those instances
whereby the health of two demographic groups (not necessarily ethnic or
racial groups) differs despite similar access to health care services.
It can be further described as differences in health that are avoidable,
unfair, and unjust, and cannot be explained by natural causes, such as
biology, or differences in choice.
Thus, if one population dies younger than another because of genetic
differences, which is a non-remediable/controllable factor, the
situation would be classified as a health inequality. Conversely, if a
population has a lower life expectancy due to lack of access to medications, the situation would be classified as a health inequity.
These inequities may include differences in the "presence of disease,
health outcomes, or access to health care". Although, it is important to
recognize the difference in health equity and equality, as having
equality in health is essential to begin achieving health equity. The importance of equitable access to healthcare has been cited as crucial to achieving many of the Millennium Development Goals.
Socioeconomic status
Socioeconomic status is both a strong predictor of health,
and a key factor underlying health inequities across populations. Poor
socioeconomic status has the capacity to profoundly limit the capabilities of an individual or population, manifesting itself through deficiencies in both financial and social capital.
It is clear how a lack of financial capital can compromise the capacity
to maintain good health. Income is an important determinant of access
to healthcare resources.
Because one's job or career is a primary conduit for both financial and
social capital, work is an important, yet underrepresented, factor in
health inequities research and prevention efforts.
There are many ways that a job can affect one's health, such as the
job's physical demands, exposure to hazards, mechanisms of employment,
compensation and benefits, and availability of health and safety
programs.
In addition, those who are in steady jobs are less likely to face
poverty and its implications and more likely to have access to health
care. Maintenance of good health through the utilization of proper
healthcare resources can be quite costly and therefore unaffordable to
certain populations.
In China, for instance, the collapse of the Cooperative Medical System left many of the rural poor uninsured and unable to access the resources necessary to maintain good health.
Increases in the cost of medical treatment made healthcare increasingly
unaffordable for these populations. This issue was further perpetuated
by the rising income inequality
in the Chinese population. Poor Chinese were often unable to undergo
necessary hospitalization and failed to complete treatment regimens,
resulting in poorer health outcomes.
Similarly, in Tanzania,
it was demonstrated that wealthier families were far more likely to
bring their children to a healthcare provider: a significant step
towards stronger healthcare.
Unequal income distribution itself can be a cause of poorer health for a
society as a result of "underinvestment in social goods, such as public
education and health care; disruption of social cohesion and the
erosion of social capital".
The role of socioeconomic status in health equity extends beyond
simple monetary restrictions on an individual's purchasing power. In
fact, social capital
plays a significant role in the health of individuals and their
communities. It has been shown that those who are better connected to
the resources provided by the individuals and communities around them
(those with more social capital) live longer lives. The segregation
of communities on the basis of income occurs in nations worldwide and
has a significant impact on quality of health as a result of a decrease
in social capital for those trapped in poor neighborhoods.
Social interventions, which seek to improve healthcare by enhancing the
social resources of a community, are therefore an effective component
of campaigns to improve a community's health.
Poor health outcomes appear to be an effect of economic inequality
across a population. Nations and regions with greater economic
inequality show poorer outcomes in life expectancy, mental health, drug abuse, obesity,
educational performance, teenage birthrates, and ill health due to
violence. On an international level, there is a positive correlation
between developed countries with high economic equality and longevity.
This is unrelated to average income per capita in wealthy nations. Economic gain only impacts life expectancy to a great degree in
countries in which the mean per capita annual income is less than
approximately $25,000.
The United States shows exceptionally low health outcomes for a
developed country, despite having the highest national healthcare
expenditure in the world. The US ranks 31st in life expectancy.
Americans have a lower life expectancy than their European counterparts,
even when factors such as race, income, diet, smoking, and education
are controlled for.
Relative inequality negatively affects health on an
international, national, and institutional levels. The patterns seen
internationally hold true between more and less economically equal
states in the United States, that is, more equal states show more
desirable health outcomes. Importantly, inequality can have a negative
health impact on members of lower echelons of institutions. The Whitehall I and II
studies looked at the rates of cardiovascular disease and other health
risks in British civil servants and found that, even when lifestyle
factors were controlled for, members of lower status in the institution
showed increased mortality and morbidity on a sliding downward scale
from their higher status counterparts.
The negative aspects of inequality are spread across the population. For
example, when comparing the United States (a more unequal nation) to
England (a less unequal nation), the US shows higher rates of diabetes,
hypertension, cancer, lung disease, and heart disease across all income
levels. This is also true of the difference between mortality across all
occupational classes in highly equal Sweden as compared to less-equal
England.
Unconditional cash transfers for reducing poverty used by some programs in the developing world appear to lead to a reduction in the likelihood of being sick. Such evidence can guide resource allocations to effective interventions.
The quality of health care varies among different socioeconomic groups.
Children in families of low socioeconomic status are the most
susceptible to health inequities. Children in poor families under 5
years of age are likely to face health disparities because the quality
of their health depends on others providing for them; young children are
not capable of maintaining good health on their own. In addition, these
children have higher mortality rates than those in richer families due
to malnutrition. Because of their low socioeconomic status, receiving
health care can be challenging. Children in poor families are less
likely to receive health care in general, and if they do have access to
care, it is likely that the quality of that care is not highly
sufficient.
Education
Education
is an important factor in healthcare utilization, though it is closely
intertwined with economic status. An individual may not go to a medical
professional or seek care if they do not know the ills of their failure
to do so, or the value of proper treatment.
In Tajikistan,
since the nation gained its independence, the likelihood of giving
birth at home has increased rapidly among women with lower educational
status. Education also has a significant impact on the quality of
prenatal and maternal healthcare. Mothers with primary education
consulted a doctor during pregnancy at significantly lower rates (72%)
when compared to those with a secondary education (77%), technical
training (88%) or a higher education (100%). There is also evidence for a correlation between socioeconomic status and health literacy; one study showed that wealthier Tanzanian families were more likely to recognize disease in their children than those that were coming from lower income backgrounds.
Social inequities are a key barrier to accessing health-related
educational resources. Patients in lower socioeconomic areas will have
less access to information about health in general, leading to less
awareness of different diseases and health issues. Health education has
proven to be a strong preventative measure that can be taken to decrease
levels of illness and increase levels of visiting healthcare providers. The lack of health education can contribute to worsened health outcomes in these areas.
Education inequities
are also closely associated with health inequities. Individuals with
lower levels of education are more likely to incur greater health risks
such as substance abuse, obesity, and injuries both intentional and
unintentional.
Education is also associated with greater comprehension of health
information and services necessary to make the right health decisions,
as well as being associated with a longer lifespan.
Individuals with high grades have been observed to display better
levels of protective health behavior and lower levels of risky health
behaviors than their less academically gifted counterparts. Factors such
as poor diets, inadequate physical activity, physical and emotional
abuse, and teenage pregnancy all have significant impacts on students'
academic performance and these factors tend to manifest themselves more
frequently in lower-income individuals.
For some populations, access to healthcare and health resources is
physically limited, resulting in health inequities. For instance, an
individual might be physically incapable of traveling the distances
required to reach healthcare services, or long distances can make
seeking regular care unappealing despite the potential benefits.
In 2019, the federal government identified nearly 80 percent of rural America as "medically underserved,"
lacking in skilled nursing facilities, as well as rehabilitation,
psychiatric and intensive care units. In rural areas, there are
approximately 68 primary care doctors per 100,000 people, whereas there
are 84 doctors per 100,000 in urban centers. According to the National Rural Health Association,
almost 10% of rural counties had no doctors in 2017. Rural communities
face lower life expectancies and increased rates of diabetes, chronic
disease, and obesity. There is a physical difference in access
healthcare as well, for emergency instances or even therapies, where
patients are to travel excessive distances to receive necessary care. These health disparities in rural areas are major problems. Over the pandemic,
however, efforts were present to make healthcare more universal. In
doing so, more awareness was given to rural populations. There are still
things that need to be done, though, underlying health disparities in
region are still prominent.
Global concentrations of healthcare resources, as depicted by the number of physicians per 100,000 individuals, by country.
Costa Rica,
for example, has demonstrable health spatial inequities with 12–14% of
the population living in areas where healthcare is inaccessible.
Inequity has decreased in some areas of the nation as a result of the
work of healthcare reform programs, however those regions not served by
the programs have experienced a slight increase in inequity.
China experienced a serious decrease in spatial health equity following the Chinese economic revolution in the 1980s as a result of the degradation of the Cooperative Medical System
(CMS). The CMS provided an infrastructure for the delivery of
healthcare to rural locations, as well as a framework to provide funding
based upon communal contributions and government subsidies. In its
absence, there was a significant decrease in the quantity of healthcare
professionals (35.9%), as well as functioning clinics (from 71% to 55%
of villages over 14 years) in rural areas, resulting in inequitable
healthcare for rural populations. The significant poverty experienced by
rural workers (some earning less than US$1 per day) further limits
access to healthcare, and results in malnutrition and poor general
hygiene, compounding the loss of healthcare resources. It is important
to also note what rural areas are composed of. There are many rural
counties that have disproportionate rates of minorities living there, a
link between the racial issue at play and that of regional status.
The loss of the CMS has had noticeable impacts on life expectancy, with
rural regions such as areas of Western China experiencing significantly
lower life expectancies.
Similarly, populations in rural Tajikistan
experience spatial health inequities. A study by Jane Falkingham of the
University of Southampton noted that physical access to healthcare was
one of the primary factors influencing quality of maternal healthcare.
Further, many women in rural areas of the country did not have adequate
access to healthcare resources, resulting in poor maternal and neonatal
care. These rural women were, for instance, far more likely to give birth in their homes without medical oversight.
Along with the socioeconomic factor of health disparities, race is
another key factor. The United States historically had large disparities
in health and access to adequate healthcare between races, and current
evidence supports the notion that these racially centered disparities continue to exist and are a significant social health issue.
The disparities in access to adequate healthcare include differences in
the quality of care based on race and overall insurance coverage based
on race. A 2002 study in the Journal of the American Medical Association
identifies race as a significant determinant in the level of quality of
care, with Black people receiving lower quality care than their white
counterparts.
This is in part because members of ethnic minorities such as African
Americans are either earning low incomes, or living below the poverty
line. In a 2007 Census Bureau, African American families made an average
of $33,916, while their white counterparts made an average of $54,920.
Due to a lack of affordable health care, the African American death
rate reveals that African Americans have a higher rate of dying from
treatable or preventable causes. According to a study conducted in 2005
by the Office of Minority Health—a U.S. Department of Health—African
American men were 30% more likely than white men to die from heart
disease. Also African American women were 34% more likely to die from breast cancer than their white counterparts. Additionally, among African American and Latino infants, mortality rates are 2 to 3 times higher than other racial groups.
An analysis of more than 2 million pregnancies found that babies born
to Black women worldwide had poorer outcomes (such as baby death and
stillbirth) than White women. This was true even after controlling for
older age and a lower level of education among mothers (an indicator of
poorer economic and social status). In the same analysis, Hispanic women
were 3 times more likely to experience a baby death than White women
and South Asian women had an increased risk of premature birth and having a baby with low birthweight compared with White women.
A 2023 scoping review of the literature found that in studies involving
multiracial or multiethnic populations, the incorporation of race or
ethnicity variables lacked thoughtful conceptualization and informative
analysis concerning their role as indicators of exposure to racialized
social disadvantage. Racialized social disadvantage encompasses systemic
and structural barriers, discrimination, and social exclusion
experienced by individuals and communities based on their race or
ethnicity, resulting in disparities in access to resources,
opportunities, and health outcomes.
Such disparities also prevalently attack indigenous communities.
As members of indigenous communities adjust to western lifestyles, they
have become more susceptible to developing certain chronic illnesses.
There are also considerable racial disparities in access to
insurance coverage, with ethnic minorities generally having less
insurance coverage than non-ethnic minorities. For example, Hispanic
Americans tend to have less insurance coverage than white Americans and
as a result receive less regular medical care. The level of insurance coverage is directly correlated with access to healthcare including preventive and ambulatory care. A 2010 study on racial and ethnic disparities in health done by the Institute of Medicine
has shown that the aforementioned disparities cannot solely be
accounted for in terms of certain demographic characteristics like:
insurance status, household income, education, age, geographic location
and quality of living conditions. Even when the researchers corrected
for these factors, the disparities persist. Slavery has contributed to disparate health outcomes for generations of African Americans in the United States.
Ethnic health inequities also appear in nations across the
African continent. A survey of the child mortality of major ethnic
groups across 11 African nations (Central African Republic, Côte
d'Ivoire, Ghana, Kenya, Mali, Namibia, Niger, Rwanda, Senegal, Uganda,
and Zambia) was published in 2000 by the WHO. The study described the
presence of significant ethnic parities in the child mortality rates
among children younger than 5 years old, as well as in education and
vaccine use.
In South Africa, the legacy of apartheid still manifests itself as a
differential access to social services, including healthcare based upon
race and social class, and the resultant health inequities.Further, evidence suggests systematic disregard of indigenous populations in a number of countries. The Pygmies
of Congo, for instance, are excluded from government health programs,
discriminated against during public health campaigns, and receive poorer
overall healthcare.
In a survey of five European countries (Sweden, Switzerland, the
UK, Italy, and France), a 1995 survey noted that only Sweden provided
access to translators for 100% of those who needed it, while the other
countries lacked this service potentially compromising healthcare to
non-native populations. Given that non-natives composed a considerable
section of these nations (6%, 17%, 3%, 1%, and 6% respectively), this
could have significant detrimental effects on the health equity of the
nation. In France, an older study noted significant differences in
access to healthcare between native French populations, and
non-French/migrant populations based upon health expenditure; however
this was not fully independent of poorer economic and working conditions
experienced by these populations.
A 1996 study of race-based health inequity in Australia revealed that Aborigines experienced higher rates of mortality
than non-Aborigine populations. Aborigine populations experienced 10
times greater mortality in the 30–40 age range; 2.5 times greater infant
mortality rate, and 3 times greater age standardized mortality rate.
Rates of diarrheal diseases and tuberculosis are also significantly
greater in this population (16 and 15 times greater respectively), which
is indicative of the poor healthcare of this ethnic group. At this
point in time, the parities in life expectancy at birth between
indigenous and non-indigenous peoples were highest in Australia, when
compared to the US, Canada and New Zealand.
In South America, indigenous populations faced similarly poor health
outcomes with maternal and infant mortality rates that were
significantly higher (up to 3 to 4 times greater) than the national
average.
The same pattern of poor indigenous healthcare continues in India,
where indigenous groups were shown to experience greater mortality at
most stages of life, even when corrected for environmental effects.
Due to systemic health and social inequities people from racial
and ethnic minority groups in the United States are disproportionately
affected by COVID-19.
On February 5, 2021, the head of the World Health Organization (WHO), Tedros Adhanom Ghebreyesus, noted regarding the global inequity in the access to COVID-19 vaccines, that almost 130 countries had not yet given a single dose.
In early April 2021, the WHO reported that 87% of existing vaccines had
been distributed to the wealthiest countries, while only 0.2% had been
distributed to the poorest countries. As a result, one-quarter of the
populations of those wealthy countries had already been vaccinated,
while only 1 in 500 residents of the poor countries had been vaccinated.
Both gender and sex are significant factors that influence health. Sex
is characterized by female and male biological differences in regards
to gene expression, hormonal concentration, and anatomical
characteristics. Gender
is an expression of behavior and lifestyle choices. Both sex and gender
inform each other, and differences between genders influence disease
manifestation and associated healthcare approaches.
Understanding how the interaction of sex and gender contributes to
disparity in the context of health allows providers to ensure quality
outcomes for patients. This interaction is complicated by the difficulty
of distinguishing between sex and gender given their intertwined
nature; sex modifies gender, and gender can modify sex, thereby
impacting health. Sex and gender can both be considered sources of health disparity;
both contribute to susceptibility to various health conditions,
including cardiovascular disease and autoimmune disorders.
Historically, research on medicine and treatment have surrounded around
the men and the male body. The gaps in research on the female body and
treatment approaches have resulted in less effective care for women.
Unfortunately, this results in under and misdiagnosed diseases for
women.
Sex differences in Life expectancy and healthy life expectancy
In most regions of the world, the mortality rate is higher for adult
men than for adult women; for example, adult men develop fatal illnesses
with more frequency than females. The list of countries by life expectancy
shows the sex gap in life expectancy. The leading causes of the higher
male death rate are accidents, injuries, violence, and cardiovascular
diseases. In most regions of the world, violence and traffic-related
injuries account for the majority of mortality of adolescent males. Men in the United States tend to live longer than women. Physicians tend to offer invasive procedures to male patients more often than to female patients.
The 2012 World Development Report (WDR) noted that women in developing nations experience greater mortality rates than men in developing nations.
Other gender disparities in health
Male disadvantage
Men
are more likely to smoke than women and experience smoking-related
health complications later in life as a result; this trend is also
observed in regard to other substances, such as marijuana, in Jamaica,
where the rate of use is 2–3 times more for men than women. Men are also more likely to have severe chronic conditions.
Female disadvantage
In
developing countries, males tend to have a health advantage over women
due to gender discrimination, evidenced by infanticide, early marriage,
and domestic abuse for females.
Women in developing countries have a much higher risk of maternal death
than those in developed countries. The highest risk of dying during
childbirth is 1 in 6 in Afghanistan and Sierra Leone, compared to nearly
1 in 30,000 in Sweden—a disparity that is much greater than that for
neonatal or child mortality.
Women are generally are of lower socioeconomic status (SES) in USA and have more barriers to accessing healthcare, and higher rates of depression and chronic stress and negative impact health. In Europe, women who grew up in poverty are more likely to have lower muscle strength and higher disability in old age.
Women are also more likely than men to suffer from sexual or intimate-partner violence
both in the United States and worldwide. Women have better access to
healthcare in the United States than they do in many other places in the
world, yet having sufficient health insurance to afford the care, such as related to postpartum treatment and care, may help to avoid additional preventable hospital readmission and emergency department visits.
In one population study conducted in Harlem, New York, 86% of
women reported having privatized or publicly assisted health insurance,
while only 74% of men reported having any health insurance. This trend
is representative of the general population of the United States.
On the other hand, a woman's access to healthcare in rural communities
has recently become a matter of concern. Access to maternal obstetric
care has decreased in rural communities due to the increase in both
hospital closers and labor & delivery center closures that have
placed an increased burden on families living in these areas. Burdens faced by women in these rural communities include financial burdens on traveling to receive adequate care.
Millions of individuals living in rural areas in the United States are
more at risk of having decreased access to maternal health care
facilities if the community is low-income. These women are more at risk of experiencing adverse maternal outcomes like a higher risk of having postpartum depression, having an out-of-hospital birth, and on the extreme end, maternal morbidity and mortality.
In addition, women's pain tends to be treated less seriously and
initially ignored by clinicians when compared to their treatment of
men's pain complaints. Historically, women have not been included in the design or practice of clinical trials,
which has slowed the understanding of women's reactions to medications
and created a research gap. This has led to post-approval adverse events
among women, resulting in several drugs being pulled from the market.
However, the clinical research industry is aware of the problem, and has
made progress in correcting it.
Cultural factors
Health
disparities are also due in part to cultural factors that involve
practices based not only on sex, but also gender status. For example, in
China,
health disparities have distinguished medical treatment for men and
women due to the cultural phenomenon of preference for male children. Recently, gender-based disparities have decreased as females have begun to receive higher-quality care. Additionally, a girl's chances of survival are impacted by the presence
of a male sibling; while girls do have the same chance of survival as
boys if they are the oldest girl, they have a higher probability of
being aborted or dying young if they have an older sister.
In India,
gender-based health inequities are apparent in early childhood. Many
families provide better nutrition for boys in the interest of maximizing
future productivity given that boys are generally seen as breadwinners.
In addition, boys receive better care than girls and are hospitalized
at a greater rate. The magnitude of these disparities increases with the
severity of poverty in a given population.
Additionally, the cultural practice of female genital mutilation (FGM) is known to impact women's health, though is difficult to know the worldwide extent of this practice. While generally thought of as a Sub-Saharan African practice, it may have roots in the Middle East as well.
The estimated 3 million girls who are subjected to FGM each year
potentially suffer both immediate and lifelong negative effects. Immediately following FGM, girls commonly experience excessive bleeding and urine retention. Long-term consequences include urinary tract infections, bacterial vaginosis, pain during intercourse, and difficulties in childbirth that include prolonged labor, vaginal tears, and excessive bleeding. Women who have undergone FGM also have higher rates of post-traumatic stress disorder (PTSD) and herpes simplex virus 2 (HSV2) than women who have not.
Sexuality and gender identity are the basis of health discrimination and inequity throughout the world. Homosexual, bisexual, transgender, and gender-variant populations around the world experience a range of health problems related to their sexuality and gender identity, some of which are complicated further by limited research.
In spite of recent advances, LGBTQ populations in China, India, and Chile continue to face significant discrimination and barriers to care. The World Health Organization
(WHO) recognizes that there is inadequate research data about the
effects of LGBTQ discrimination on morbidity and mortality rates in the
patient population. In addition, retrospective epidemiological studies
on LGBTQ populations are difficult to conduct as a result of the
practice that sexual orientation is not noted on death certificates.
WHO has proposed that more research about the LGBTQ patient population
is needed for improved understanding of its unique health needs and
barriers to accessing care.
One of the main forms of healthcare discrimination LGBTQ
individuals face is discrimination from healthcare workers or
institutions themselves. LGBTQ people often face significant difficulties in accessing care as a
result to discrimination and homophobia from healthcare professionals.
This discrimination can take the form of verbal abuse, disrespectful
conduct, refusal of care, the withholding of health information,
inadequate treatment, and outright violence.
Additionally, members of the LGBTQ community contend with health
care disparities due, in part, to lack of provider training and
awareness of the population's healthcare needs.
Transgender individuals believe that there is a higher importance of
providing gender identity (GI) information more than sexual orientation
(SO) to providers to help inform them of better care and safe treatment
for these patients.
Studies regarding patient-provider communication in the LGBTQ patient
community show that providers themselves report a significant lack of
awareness regarding the health issues LGBTQ-identifying patients face.
As a component of this fact, medical schools do not focus much
attention on LGBTQ health issues in their curriculum; the LGBTQ-related
topics that are discussed tend to be limited to HIV/AIDS, sexual
orientation, and gender identity.
Among LGBTQ-identifying individuals, transgender individuals face especially significant barriers to treatment. Many countries still do not have legal recognition of transgender or non-binary gender individuals leading to placement in misgendered hospital wards and medical discrimination.
Seventeen European states mandate sterilization of individuals who seek
recognition of a gender identity that diverges from their birth gender.
In addition to many of the same barriers as the rest of the LGBTQ
community, globally the transgender individuals often also face a higher
disease burden. Transgender people also face significant levels of discrimination. Due to this experience, many transgender people avoid seeking necessary medical care out of fear of discrimination.
The stigmatization represented particularly in the transgender
population creates a health disparity for LGBTQ individuals with regard
to mental health. The LGBTQ community is at increased risk for psychosocial distress, mental health complications, suicidality, homelessness, and substance abuse, often complicated by access-based under-utilization or fear of health services.
Transgender and gender-variant individuals have been found to
experience higher rates of mental health disparity than LGB individuals.
These mental health facts are informed by a history of anti-LGBTQ bias in health care. The Diagnostic and Statistical Manual of Mental Disorders (DSM) listed homosexuality as a disorder until 1973; transgender status was listed as a disorder until 2012. This was amended in 2013 with the DSM-5 when "gender identity disorder" was replaced with "gender dysphoria",
reflecting that simply identifying as transgender is not itself
pathological and that the diagnosis is instead for the distress a
transgender person may experience as a result of the discordance between
assigned gender and gender identity.
LGBTQ health issues have received disproportionately low levels
of medical research, leading to difficulties in assessing appropriate
strategies for LGBTQ treatment. For instance, a review of medical
literature regarding LGBTQ patients revealed that there are significant
gaps in the medical understanding of cervical cancer in lesbian and
bisexual individuals
it is unclear whether its prevalence in this community is a result of
probability or some other preventable cause. For example, LGBTQ people
report poorer cancer care experiences.
It is incorrectly assumed that LGBTQ women have a lower incidence of
cervical cancer than their heterosexual counterparts, resulting in lower
rates of screening. Such findings illustrate the need for continued research focused on
the circumstances and needs of LGBTQ individuals and the inclusion in
policy frameworks of sexual orientation and gender identity as social
determinants of health.
LGB people are at higher risk of some cancers and LGBTQI are at
higher risk of mental illness. The causes of these health inequities are
"i) cultural and social norms that preference and prioritise
heterosexuality; ii) minority stress associated with sexual orientation,
gender identity and sex characteristics; iii) victimisation; iv)
discrimination (individual and institutional), and; v) stigma."
Environmental influences
Minority
populations have increased exposure to environmental hazards that
include lack of neighborhood resources, structural and community factors
as well as residential segregation that result in a cycle of disease
and stress. The environment that surrounds us can influence individual behaviors and lead to poor health choices and therefore outcomes.
Minority neighborhoods have been continuously noted to have more fast
food chains and fewer grocery stores than predominantly white
neighborhoods. These food deserts
affect a family's ability to have easy access to nutritious food for
their children. This lack of nutritious food extends beyond the
household into the schools that have a variety of vending machines and
deliver over processed foods. A related concept that impacts food choices is the prevalence of food swamps,
or areas with overexposure to fast-food options.These environmental
condition have social ramifications and in the first time in US history
is it projected that the current generation will live shorter lives than
their predecessors will.
In addition, minority neighborhoods have various health hazards
that result from living close to highways and toxic waste factories or
general dilapidated structures and streets.
These environmental conditions create varying degrees of health risk
from noise pollution, to carcinogenic toxic exposures from asbestos and
radon that result in increase chronic disease, morbidity, and mortality.
The quality of residential environment such as damaged housing has been
shown to increase the risk of adverse birth outcomes, which is
reflective of a communities health. This occurs through exposure to lead
in paint and lead contaminated soil as well as indoor air pollutants
such as second-hand smoke and fine particulate matter.
Housing conditions can create varying degrees of health risk that lead
to complications of birth and long-term consequences in the aging
population.
In addition, occupational hazards can add to the detrimental effects
of poor housing conditions. It has been reported that a greater number
of minorities work in jobs that have higher rates of exposure to toxic
chemical, dust and fumes.
One example of this is the environmental hazards that poor Latino
farmworkers face in the United States. This group is exposed to high
levels of particulate matter and pesticides on the job, which have
contributed to increased cancer rates, lung conditions, and birth
defects in their communities.
Racial segregation is another environmental factor that occurs
through the discriminatory action of those organizations and working
individuals within the real estate industry, whether in the housing
markets or rentals. Even though residential segregation is noted in all
minority groups, Black people tend to be segregated regardless of income
level when compared to Latinos and Asians.
Thus, segregation results in minorities clustering in poor
neighborhoods that have limited employment, medical care, and
educational resources, which is associated with high rates of criminal
behavior.
In addition, segregation affects the health of individual residents
because the environment is not conducive to physical exercise due to
unsafe neighborhoods that lack recreational facilities and have
nonexistent park space. Racial and ethnic discrimination adds an additional element to the environment that individuals have to interact with daily.
Individuals that reported discrimination have been shown to have an
increase risk of hypertension in addition to other physiological stress
related affects.
The high magnitude of environmental, structural, socioeconomic
stressors leads to further compromise on the psychological and physical
being, which leads to poor health and disease.
Individuals living in rural areas, especially poor rural areas,
have access to fewer health care resources. Although 20 percent of the
U.S. population lives in rural areas, only 9 percent of physicians
practice in rural settings. Individuals in rural areas typically must
travel longer distances for care, experience long waiting times at
clinics, or are unable to obtain the necessary health care they need in a
timely manner. Rural areas characterized by a largely Hispanic
population average 5.3 physicians per 10,000 residents compared with 8.7
physicians per 10,000 residents in non-rural areas. Financial barriers
to access, including lack of health insurance, are also common among the
urban poor.
What is more concerning is that the minorities in rural areas
participate in research even less than the minorities in urban areas,
which can be understood as a very noticeable and unhealthy difference
given that minorities in urban areas are already lacking in health
research participation. A recent self-study showed that people in
Arkansas were mostly willing to participate in studies, but lacked the
opportunity, and that minority groups, including Black and Hispanic
groups, were more likely to express this interest than that of others,
yet they generally lack the opportunity to actually commit to it.
Disparities in access to health care
Reasons for disparities in access to health care are many, but can include the following:
Lack of a regular source of care. Without access to a regular
source of care, patients have greater difficulty obtaining care, fewer
doctor visits, and more difficulty obtaining prescription drugs.
Compared to whites, minority groups in the United States are less likely
to have a doctor they go to on a regular basis and are more likely to
use emergency rooms and clinics as their regular source of care. In the United Kingdom, which is much more racially harmonious, this issue arises for a different reason; since 2004, NHS GPs have not been responsible for care out of normal GP surgery opening hours, leading to significantly higher attendances in A+E
Lack of financial resources. Although the lack of financial
resources is a barrier to health care access for many Americans, the
impact on access appears to be greater for minority populations.
Legal
barriers. Access to medical care by low-income immigrant minorities can
be hindered by legal barriers to public insurance programs. For
example, in the United States federal law bars states from providing Medicaid coverage to immigrants who have been in the country fewer than five years.
Another example could be when a non-English speaking person attends a
clinic where the receptionist does not speak the person's language. This
is mostly seen in people who have limited English proficiency, or LEP.
Structural barriers. These barriers include poor transportation, an
inability to schedule appointments quickly or during convenient hours,
and excessive time spent in the waiting room, all of which affect a
person's ability and willingness to obtain needed care.
Scarcity of providers. In inner cities, rural areas, and communities
with high concentrations of minority populations, access to medical
care can be limited due to the scarcity of primary care practitioners,
specialists, and diagnostic facilities.
This scarcity can also extend to the personnel in the medical
laboratory with some geographical regions having significantly
diminished access to advanced diagnostic methods and pathology care. In the UK, Monitor (a quango) has a legal obligation to ensure that sufficient provision exists in all parts of the nation.
The health care financing system. The Institute of Medicine
in the United States says fragmentation of the U.S. health care
delivery and financing system is a barrier to accessing care. Racial and
ethnic minorities are more likely to be enrolled in health insurance
plans which place limits on covered services and offer a limited number
of health care providers.
Linguistic barriers. Language differences restrict access to medical care for minorities in the United States who have limited English proficiency.
Health literacy.
This is where patients have problems obtaining, processing, and
understanding basic health information. For example, patients with a
poor understanding of good health may not know when it is necessary to
seek care for certain symptoms. While problems with health literacy are
not limited to minority groups, the problem can be more pronounced in
these groups than in whites due to socioeconomic and educational
factors.
A study conducted in Mdantsane, South Africa depicts the correlation of
maternal education and the antenatal visits for pregnancy. As patients
have a greater education, they tend to use maternal health care services
more than those with a lesser maternal education background.
Lack of diversity in the health care workforce. A major reason for disparities in access to care are the cultural
differences between predominantly white health care providers and
minority patients. Only 4% of physicians in the United States are
African American, and Hispanics represent just 5%, even though these
percentages are much less than their groups' proportion of the United
States population.
Age. Age can also be a factor in health disparities for a number of
reasons. As many older Americans exist on fixed incomes which may make
paying for health care expenses difficult. Additionally, they may face
other barriers such as impaired mobility or lack of transportation which
make accessing health care services challenging for them physically.
Also, they may not have the opportunity to access health information via
the internet as less than 15% of Americans over the age of 65 have
access to the internet.
This could put older individuals at a disadvantage in terms of
accessing valuable information about their health and how to protect it.
On the other hand, older individuals in the US (65 or above) are
provided with medical care via Medicare.
Criminalization and lack of research of traditional medicine, and mental health treatments. Mental illness accounts for about one-third of adult disability globally. Conventional drug treatments have dominated psychiatry for decades, without a breakthrough in mental healthcare. Access to psychedelic-assisted therapy, and the decriminalization of Psilocybin and other entheogens are questions of health justice.
Health insurance
A major part of the United States' healthcare system is health insurance.
The main types of health insurance in the United States includes
taxpayer-funded health insurance and private health insurance.
Funded through state and federal taxes, some common examples of
taxpayer-funded health insurance include Medicaid, Medicare, and CHIP. Private health insurance is offered in a variety of forms, and includes plans such as Health Maintenance Organizations (HMO's) and Preferred Provider Organization (PPO's).
While health insurance increases the affordability of healthcare in the
United States, issues of access along with additional related issues
act as barriers to health equity.
There are many issues due to health insurance that affect health equity, including the following:
Health Insurance Literacy. Within these health insurance plans, common aspects of the insurance include premiums, deductibles, co-payments, coinsurance, coverage limits, in-network versus out-of-network providers, and prior authorization. According to a United Health survey, only 9% of Americans surveyed understood these health insurance terms.
To address issues in finding available insurance plans and confusion
around the components of health insurance policies, the Affordable Care
Act (ACA) set up state-mandated health insurance marketplaces or health
exchanges, where individuals can research and compare different kinds of
health care plans and their respective components. Between 2014 and 2020, over 11.4 million people have been able to sign up for health insurance through the Marketplaces.
However, most Marketplaces focus more on the presentation of health
insurances and their coverages, rather than including detailed
explanations of the health insurance terms.
Lack of universal health care or health insurance
coverage. According to the Congressional Budget Office (CBO), 28.9
million people in the United States were uninsured in 2018, and that
number would rise to an estimated 35 million people by 2029.
Without health insurance, patients are more likely to postpone medical
care, go without needed medical care, go without prescription medicines,
and be denied access to care. Minority groups in the United States lack insurance coverage at higher rates than whites. This problem does not exist in countries with fully funded public health systems, such as the examplar of the NHS.
Underinsured or inefficient health insurance coverage. While there
are many causes of underinsurance, a common a reason is due to low
premiums, the up front yearly or monthly amount individuals pay for
their insurance policy, and high deductibles, the amount paid out of pocket by the policy holder before an insurance provider will pay any expenses.
Under the ACA, individuals were subject to a fee called the Shared
Responsibility Payment, which occurred as a result of not buying health
insurance despite being able to afford it.
While this mandate was aimed at increasing health insurance rates for
Americans, it also led many individuals to sign up for relatively
inexpensive health insurance plans that did not provide adequate health
coverage in order to avoid the repercussions of the mandate.
Similar to those who lack health insurance, these underinsured
individuals also deal with the side effects that occur as a result of
lack of care.
Dental healthcare
In
many countries, dental healthcare is less accessible than other kinds
of healthcare resulting in increased risk for oral and systemic
diseases. In Western countries, dental healthcare providers are present,
and private or public healthcare systems typically facilitate access.
However, access remains limited for marginalized groups such as the
homeless, racial minorities, and those who are homebound or disabled. In
Central and Eastern Europe, the privatization of dental healthcare has
resulted in a shortage of affordable options for lower-income people. In
Eastern Europe, school-age children formerly had access through school
programs, but these have been discontinued. Therefore, many children no
longer have access to care. Access to services and the breadth of
services provided is greatly reduced in developing regions. Such
services may be limited to emergency care and pain relief, neglecting
preventative or restorative services. Regions like Africa, Asia, and
Latin America do not have enough dental health professionals to meet the
needs of the populace. In Africa, for example, there is only one
dentist for every 150,000 people, compared to industrialized countries
which average one dentist per 2,000 people.
Disparities in quality of health care
Health disparities in the quality of care exist and are based on language and ethnicity/race which includes:
Problems with patient-provider communication
Communication
is critical for the delivery of appropriate and effective treatment and
care, regardless of a patient's race, and miscommunication can lead to
incorrect diagnosis, improper use of medications, and failure to receive
follow-up care. The patient provider relationship is dependent on the
ability of both individuals to effectively communicate. Language and
culture both play a significant role in communication during a medical
visit. Among the patient population, minorities face greater difficulty
in communicating with their physicians. For example, Asian-American
patients were reported to have both less trust and satisfaction with
their healthcare providers than that of white patients, and so by a
substantial amount. Not only cultural and communication errors arise
from here, but also those of racial constraints that have patterned
American history for years. This is all occurring even when the
Asian-American population stands as one of the fastest growing.
Despite being the only racial/ethnic group that has cancer as the
leading cause of death, they are also linked to extremely low rates of
cancer screenings.
It is not that they can't, since Asian Americans typically find
themselves in the more economically stable side of American society. It
is based largely, though, on the distrusts felt by this group towards
healthcare providers. In another study, patients when surveyed responded
that 19% of the time they have problems communicating with their
providers which included understanding doctor, feeling doctor listened,
and had questions but did not ask. In contrast, the Hispanic population had the largest problem communicating with their provider, 33% of the time.
Minority groups are also less likely to have a care provider from the
same background. This can create a feeling of disconnect between the
patient and the provider, separating trust from the equation. People are
more likely to feel close to others alike. In healthcare, where a
strong relationship between the patient and provider is necessary, it
could help for the provider and patient to be similar in some way.
Communication has been linked to health outcomes, as communication
improves so does patient satisfaction which leads to improved compliance
and then to improved health outcomes.
Quality of care is impacted as a result of an inability to communicate
with health care providers. Language plays a pivotal role in
communication and efforts need to be taken to ensure excellent
communication between patient and provider. Among limited English proficient
patients in the United States, the linguistic barrier is even greater.
Less than half of non-English speakers who say they need an interpreter
during clinical visits report having one. The absence of interpreters
during a clinical visit adds to the communication barrier. Furthermore,
inability of providers to communicate with limited English proficient
patients leads to more diagnostic procedures, more invasive procedures,
and over prescribing of medications.
Language barriers have not only hindered appointment scheduling,
prescription filling, and clear communications, but have also been
associated with health declines, which can be attributed to reduced
compliance and delays in seeking care, which could affect particularly refugee health in the United States.
Many health-related settings provide interpreter services for their
limited English proficient patients. This has been helpful when
providers do not speak the same language as the patient. However, there
is mounting evidence that patients need to communicate with a language
concordant physician (not simply an interpreter) to receive the best
medical care, bond with the physician, and be satisfied with the care
experience.
Having patient-physician language discordant pairs (i.e.
Spanish-speaking patient with an English-speaking physician) may also
lead to greater medical expenditures and thus higher costs to the
organization.
Additional communication problems result from a decrease or lack of
cultural competence by providers. It is important for providers to be
cognizant of patients' health beliefs and practices without being
judgmental or reacting. Understanding a patients' view of health and
disease is important for diagnosis and treatment. So providers need to
assess patients' health beliefs and practices to improve quality of
care.
Patient health decisions can be influenced by religious beliefs,
mistrust of Western medicine, and familial and hierarchical roles, all
of which a white provider may not be familiar with.
Other type of communication problems are seen in LGBTQ health care with
the spoken heterosexist (conscious or unconscious) attitude on LGBTQ
patients, lack of understanding on issues like having no sex with men
(lesbians, gynecologic examinations) and other issues.
The same types of problems too exist in people with disabilities, who
still to this day face the effects from past Western medicine procedures
that brought injustice to their community.
Provider discrimination
Provider discrimination
occurs when health care providers either unconsciously or consciously
treat certain racial and ethnic patients differently from other
patients. This may be due to stereotypes that providers may have towards
ethnic/racial groups. A March, 2000 study from Social Science &
Medicine suggests that doctors may be more likely to ascribe negative
racial stereotypes to their minority patients.
This may occur regardless of consideration for education, income, and
personality characteristics. Two types of stereotypes may be involved, automatic stereotypes
or goal modified stereotypes. Automated stereotyping is when
stereotypes are automatically activated and influence
judgments/behaviors outside of consciousness.
Goal modified stereotype is a more conscious process, done when
specific needs of clinician arise (time constraints, filling in gaps in
information needed) to make a complex decisions. Physicians are unaware of their implicit biases.
Some research suggests that ethnic minorities are less likely than
whites to receive a kidney transplant once on dialysis or to receive
pain medication for bone fractures. Critics question this research and
say further studies are needed to determine how doctors and patients
make their treatment decisions. Others argue that certain diseases
cluster by ethnicity and that clinical decision making does not always
reflect these differences.
Lack of preventive care
According
to the 2009 National Healthcare Disparities Report, uninsured Americans
are less likely to receive preventive services in health care. For example, minorities are not regularly screened for colon cancer
and the death rate for colon cancer has increased among African
Americans and Hispanic populations. Furthermore, limited English
proficient patients are also less likely to receive preventive health
services such as mammograms.
Studies have shown that use of professional interpreters have
significantly reduced disparities in the rates of fecal occult testing,
flu immunizations and pap smears. In the UK, Public Health England,
a universal service free at the point of use, which forms part of the
NHS, offers regular screening to any member of the population considered
to be in an at-risk group (such as individuals over 45) for major
disease (such as colon cancer, or diabetic-retinopathy).
Plans for achieving health equity
There
are a multitude of strategies for achieving health equity and reducing
disparities outlined in scholarly texts, some examples include:
Advocacy. Advocacy for health equity has been identified as a key means of promoting favourable policy change.
EuroHealthNet carried out a systematic review of the academic and grey
literature. It found, amongst other things, that certain kinds of
evidence may be more persuasive in advocacy efforts, that practices
associated with knowledge transfer and translation can increase the
uptake of knowledge, that there are many different potential advocates
and targets of advocacy and that advocacy efforts need to be tailored
according to context and target. As a result of its work, it produced an online advocacy for health equity toolkit.
Provider based incentives to improve healthcare for ethnic
populations. One source of health inequity stems from unequal treatment
of non-white patients in comparison with white patients. Creating
provider based incentives to create greater parity between treatment of
white and non-white patients is one proposed solution to eliminate
provider bias. These incentives typically are monetary because of its effectiveness in influencing physician behavior.
Using Evidence Based Medicine (EBM). Evidence Based Medicine (EBM)
shows promise in reducing healthcare provider bias in turn promoting
health equity.
In theory EBM can reduce disparities however other research suggests
that it might exacerbate them instead. Some cited shortcomings include
EBM's injection of clinical inflexibility in decision making and its
origins as a purely cost driven measure.
Increasing awareness. The most cited measure to improving health
equity relates to increasing public awareness. A lack of public
awareness is a key reason why there has not been significant gains in
reducing health disparities in ethnic and minority populations.
Increased public awareness would lead to increased congressional
awareness, greater availability of disparity data, and further research
into the issue of health disparities.
The Gradient Evaluation Framework. The evidence base defining which
policies and interventions are most effective in reducing health
inequalities is extremely weak. It is important therefore that policies
and interventions which seek to influence health inequity be more
adequately evaluated. Gradient Evaluation Framework (GEF) is an
action-oriented policy tool that can be applied to assess whether
policies will contribute to greater health equity amongst children and
their families.
The AIM framework. In a pilot study, researchers examined the role
of AIM—ability, incentives, and management feedback—in reducing care
disparity in pressure-ulcer detection between African American and
Caucasian residents. The results showed that while the program was
implemented, the provision of (1) training to enhance ability, (2)
monetary incentives to enhance motivation, and (3) management feedback
to enhance accountability led to successful reduction in pressure
ulcers. Specifically, the detection gap between the two groups
decreased. The researchers suggested additional replications with longer
duration to assess the effectiveness of the AIM framework.
Monitoring actions on the social determinants of health. In 2017,
citing the need for accountability for the pledges made by countries in
the Rio Political Declaration on Social Determinants of Health, the
World Health Organization and United Nations Children's Fund called for
the monitoring of intersectoral interventions on the social determinants
of health that improve health equity.
Changing the distribution of health services. Health services play a
major role in health equity. Health inequities stem from lack of access
to care due to poor economic status and an interaction among other social determinants of health.
The majority of high quality health services are distributed among the
wealthy people in society, leaving those who are poor with limited
options. In order to change this fact and move towards achieving health
equity, it is essential that health care increases in areas or
neighborhoods consisting of low socioeconomic families and individuals.
Prioritize treatment among the poor. Because of the challenges that
arise from accessing health care with low economic status, many
illnesses and injuries go untreated or are not given sufficient
treatment. Promoting treatment as a priority among the poor will give
them the resources they need in order to achieve good health, because
health is a basic human right.
Implementing medical pluralism. Extreme differences that underlie urban and alternative medicine
approaches emphasize the need for a system that represents the duality
of the populations it intends to serve. Urban medicine generally
believes that technological advancement is the best way to help treat
illness as it allows for a more "sophisticated" mode of care;
alternative medicine is more traditional in relying solely on herbal and
natural remedies believing that the elaborate institutions of urban
care are not best suited for serving individual needs. Medical
pluralism, hence, is an adaptive tactic most effective for communities
that include Indigenous people, and mixed rural-urban populations.
Medical pluralism acknowledges the needs of a variety of people and is a
step closer to health equity. Medical pluralism "avoids the extremes''
of most current healthcare delivery approaches and provides a
middle-ground perspective on tackling health issues that are not solved
by urban or rural health alone.
By practicing integrative medicine, chronic and unresolved health
issues are better treated, borrowing from the technological and
philosophical approaches of both models of care. Aimed at embracing both
medical techniques, medical pluralism is currently being considered in
nations with diverse communities; it is manifested in the practice of
integrative medicine which is a deliberate execution of that approach.
There are currently ongoing efforts to implement this dual model of
healthcare delivery regionally in nations composed of very diverse
communities, and such is the case in many Latin American countries such
as Ecuador that have a large indigenous population. The process of
successfully implementing an integrative healthcare system is discussed
as having six main steps that pose different challenges. Guito et al.'s
guidelines for each steps describes the first as being 'imperceptible
integration" to the sixth being "total integration".
Artificial Intelligence
(AI) can be helpful in identifying and improving issues of health
disparities. A recent scoping review of the literature found that it is
important to engage with various communities while AI health
applications are being developed and also reviewed based on various
biases that are later identified through this work.
Pandemic Treaty. The WHO's member states made health equity the
central principle of the convention or other international instrument
under negotiation.
G20's initiative for healthcare
In 2023, the G20 under its Affordable Healthcare Model Hospital initiative, with the Government of Andhra Pradesh, India, opened a 100-bed facility in Srikakulam, drawing support from the Aarogyasri scheme.
Health inequalities
Health
inequality is the term used in a number of countries to refer to those
instances whereby the health of two demographic groups (not necessarily
ethnic or racial groups) differs despite comparative access to health
care services. Such examples include higher rates of morbidity and mortality
for those in lower occupational classes than those in higher
occupational classes, and the increased likelihood of those from ethnic
minorities being diagnosed with a mental health disorder. In Canada, the issue was brought to public attention by the LaLonde report.
In UK, the Black Report was produced in 1980 to highlight inequalities. On 11 February 2010, Sir Michael Marmot, an epidemiologist at University College London, published the Fair Society, Healthy Lives
report on the relationship between health and poverty. Marmot described
his findings as illustrating a "social gradient in health": the life
expectancy for the poorest is seven years shorter than for the most
wealthy, and the poor are more likely to have a disability. In its
report on this study, The Economist argued that the material
causes of this contextual health inequality include unhealthful
lifestyles – smoking remains more common, and obesity is increasing
fastest, amongst the poor in Britain.
Research
to identify health inequities, how they arise and what can be done to
address them is essential to securing health equity. However, the same
exclusionary social structures that contribute to health inequities in
society also influence and are reproduced by researchers and public
health institutions.
In other words, medicine and public health organizations have evolved
to better meet the needs of some groups more than others. Candidate
variance in research can be important to ensure a safe life for every
individual equally. Precision medicine lacks in minority groups relative
to its effectiveness in whites.
While there are many examples of bias in medical and public health
research, some general categories of exclusionary research practices
include:
1) Structural invisibility – approaches to collection, analysis or
publication of data which hide the potential contribution of social
factors to the distribution of health risks or outcomes. For example,
limitations in public health surveys in the United States to collect
data on race, ethnicity, and nativity; (2) Institutionalized exclusion –
codification of exclusionary social structures in research practices,
instruments, and scientific models resulting in an inherent bias in
favor of the normative group. For example, the definition of a human as
an 80 kg man in toxicology; (3) Unexamined assumptions – cultural norms
and unconscious bias that can impact all aspects of research. In other
words, assuming that the researchers' perspective and understanding is
objective and universally shared. For example, the lack of conceptual
equivalence across multi-lingual survey instruments.
Take the Asian-American community as a reference. For this
subpopulation only is cancer the leading cause of death. This could be a
result of Asian-Americans being less likely to appear in studies of
environmental factors on health due to a false assumption that they are
the same as whites.
There is also a general distrust from the Asian-American population
towards Western healthcare as a result of historical racial pressures
and cultural differences.
In recent years, governmental figures in the United States have pushed
for change, especially with the recent pandemic where making healthcare
more accessible became more understanding. Whether their ways in which
they aim for change were considered as appropriate differed on the
audience.
Different racial and ethnic groups faced the pandemic on different
levels than that of whites. It is in this way that COVID-19 served as an
eye opener to some of the major issues at hand. For example, in
minority groups in the United States other than Asian-American and
Non-Hispanic groups, there were greater rates of infection,
hospitalization, and death when compared to the rates of Whites.
Despite efforts, there were also concerns in differences in efficacy of
the vaccines against the pandemic. For example, many of the clinical
trials in the development of COVID-19 vaccines
did not consider safe and inclusive plans. Taking approaches that
develop protocols specific to different groups equally could be a way to
combat this.
Health disparity and genomics
Genomics
applications continue to increase in clinical/medical applications.
Historically, results from studies do not include underrepresented
communities and races.
The question of who benefits from publicly funded genomics is an
important public health consideration, and attention will be needed to
ensure that implementation of genomic medicine does not further entrench
social‐equity concerns. Currently the National Human Genome Research Institute
counts with a Genomics and Health Disparities Interest Group to tackle
the issues of accessibility and application of genomic medicine to
communities not normally represented. The Director of the Health
Disparities Group, Vence L. Bonham Jr.,
leads a team that seeks to qualify and better understand the
disparities and reduce the gap in access to genetic counseling,
inclusion of minority communities in original research, and access to
genetic information to improve health.
There is some movement toward progress, though. Sickle cell disease, which disproportionately impacts Black people where every 1 of 365 births has the condition, is treatable with gene therapy. In December 2023, the United States' Food and Drug Administration (FDA) approved two gene therapy treatments
that use gene editing machinery known as CRISPR/Cas9 to alleviate the
sickling of the red blood cells. This will greatly improve the
livelihoods of millions, but especially people of color who are much
more at risk for this condition.
