Social Inequality and Health Disparities (AAMC 10A)
Content category 10A, the only category in foundational concept 10, connects social structure to health. The social structure and demographics page defines social mobility, socioeconomic status and absolute vs relative poverty. This page covers the rest of the outline: spatial inequality, the forms of capital that reproduce class position, intersectionality, health and health care disparities and the mechanisms behind them, and the basic social epidemiology measures you need to read the data tables that 10A passages are built on.
Spatial Inequality
Spatial inequality is the unequal distribution of resources and services across places: neighborhoods, regions, urban vs rural areas, and countries. Where a person lives shapes access to jobs, good schools, safe housing, parks, healthy food and medical care.
- Residential segregation
- The physical separation of groups (by race, ethnicity or income) into different neighborhoods. It has been produced historically by discriminatory lending, zoning and housing practices, as well as by income differences and preferences.
- Neighborhood effects
- Outcomes associated with the neighborhood itself, beyond individual characteristics: concentrated poverty, limited job networks, under-resourced schools.
- Food deserts
- Areas with limited access to affordable, nutritious food, often low-income urban or rural areas, where convenience stores outnumber full-service grocers.
- Environmental justice
- The principle that all groups should share equally in environmental protection. Low-income communities and communities of color have historically been more exposed to pollution, waste sites and industrial hazards.
- Global inequality
- Differences in wealth and health between nations, explained in different ways by modernization, dependency and world systems theories.
Rural areas face their own disadvantages: fewer hospitals and specialists, longer travel times, and higher rates of some chronic diseases. Urban areas with concentrated poverty face high rates of violence, asthma and environmental exposures.
Social Class and Capital
Socioeconomic status (SES) is usually measured by combining income, education and occupation. Each captures something different: income buys goods and services, education shapes knowledge and health behaviors, and occupation affects exposures, autonomy and prestige. Wealth (assets minus debts) is distributed far more unequally than income and is a major buffer against shocks such as illness or job loss.
| System | Basis of position | Mobility |
|---|---|---|
| Caste system | Ascribed status at birth, often tied to religion or tradition | Closed: little or no movement between strata |
| Class system | Mix of ascribed and achieved status, mainly economic | Open: movement possible but shaped by origins |
| Meritocracy (ideal) | Individual talent and effort alone | Fully open; no society perfectly achieves it |
| Capital | Meaning | Example |
|---|---|---|
| Economic capital | Money and assets | Savings that cover tutoring or medical bills |
| Human capital | Skills, knowledge and education that raise productivity | A professional degree |
| Cultural capital (Bourdieu) | Non-financial assets such as tastes, speech styles, knowledge of institutions and credentials, which signal class and are rewarded by schools and employers | Knowing how to navigate college applications or speak comfortably with doctors |
| Social capital | Resources available through social networks. Bonding capital comes from close ties within a group; bridging capital comes from ties across groups | A family friend who passes on a job opening |
Social reproduction is the transmission of social inequality from one generation to the next, through inherited wealth, unequal schools and cultural capital. The belief in meritocracy can make these advantages look like individual achievement. Granovetter's research on the strength of weak ties found that acquaintances (weak ties) are often more useful for finding jobs than close friends, because they connect people to new information.
Poverty and Social Exclusion
Absolute poverty is lacking the resources for basic needs; relative poverty is having far less than others in one's society. Official poverty lines are policy definitions that vary between countries and over time.
- Social exclusion
- Being shut out of full participation in society (jobs, education, housing, political life, social networks), often as a combined effect of poverty, discrimination and spatial isolation.
- Intergenerational poverty
- Poverty that persists across generations, sustained by limited wealth, segregated neighborhoods and unequal schools.
- Culture of poverty
- A contested view that poor communities develop values that perpetuate poverty. Most sociologists emphasize structural causes instead, such as lack of jobs and discrimination; the theory is often criticized as blaming the victim.
Intersectionality
Intersectionality, a term introduced by Kimberlé Crenshaw, holds that systems of inequality based on race, class, gender, sexual orientation, disability and other categories overlap and interact. A low-income woman of color may face disadvantages that are not simply the sum of separate gender, race and class effects. For research, this means outcomes should be examined for groups defined by combinations of characteristics, not one variable at a time.
Health Disparities
A health disparity is a difference in health outcomes between groups that is closely linked to social, economic or environmental disadvantage. Health tends to follow a social gradient: at every step down the SES ladder, average health worsens and life expectancy falls, not just at the bottom. Major patterns:
- Class: lower SES is associated with higher rates of heart disease, diabetes, infant mortality and earlier death.
- Race and ethnicity: many minority groups in the US have higher rates of certain chronic diseases and maternal and infant mortality. Differences in SES explain part but not all of these gaps; discrimination and its chronic stress, segregation, and differences in treatment also contribute.
- Gender: women have longer life expectancy in most countries but report more chronic illness and disability; men have higher rates of death from heart disease, injury and suicide.
- Sexual and gender minorities: higher rates of some mental health conditions, linked to stigma and minority stress.
- Material conditions: housing quality, food, environmental exposures, unsafe work.
- Health behaviors: smoking, diet and physical activity are patterned by SES and by environments that make some choices easier than others.
- Chronic stress: repeated activation of the stress response produces allostatic load. The weathering hypothesis proposes that cumulative disadvantage and discrimination cause earlier health deterioration in marginalized groups.
- Access to care: insurance, cost, distance and the quality of care received.
Health Care Disparities and Access
Distinguish health disparities (differences in outcomes) from health care disparities (differences in access to or quality of care, such as insurance coverage, wait times, pain treatment or screening rates). Barriers to access include:
- Financial: lack of insurance, underinsurance, high out-of-pocket costs.
- Structural: shortage of providers in rural and low-income areas, transportation, clinic hours that conflict with work.
- Linguistic and cultural: language barriers, lack of interpreters, low health literacy, mistrust grounded in past mistreatment.
- Provider-level: implicit bias that can affect diagnosis and treatment decisions.
Policies designed to reduce disparities include expanding insurance coverage, community health centers, interpreter services, culturally competent care and workforce diversity.
Social Epidemiology
Social epidemiology studies how social structures and conditions affect the distribution of health and disease. You need several measures to read passage data.
- Incidence
- The number of new cases in a population over a period, divided by the population at risk. It measures risk of developing the condition.
- Prevalence
- The number of existing cases (new and old) at a point or period, divided by the total population. It measures burden. Prevalence rises when incidence rises or when people live longer with the condition.
- Morbidity
- The burden of illness or disability in a population.
- Mortality
- The rate of death in a population.
A town of 10,000 people has 400 people living with diabetes on January 1. During the year, 100 new cases are diagnosed, and no one with diabetes dies or leaves.
Incidence = 100 new cases / 9,600 people at risk (those without diabetes at the start) ≈ 10.4 per 1,000 per year. Prevalence at the end of the year = 500 / 10,000 = 5%. If a new treatment helps people with diabetes live longer without curing them, prevalence will rise even if incidence stays the same.
Worked MCQs
5 MCQs in the style of the Psych/Soc section, several built around a study design.
Q1. A city's poorest neighborhood has more fast-food outlets and convenience stores than full-service grocery stores and higher rates of obesity than wealthier areas. Which concept most directly describes the neighborhood's food environment?
A food desert is an area with limited access to affordable, nutritious food. It is an example of spatial inequality that can contribute to health disparities.
Q2. A first-generation college student says her classmates seem to know how to approach professors and use office hours in ways she was never taught. Sociologists would say her classmates have more:
Cultural capital refers to non-financial knowledge, skills and styles, such as knowing how institutions work, that signal class background and are rewarded by schools. It is distinct from money (economic capital) and job-relevant skills (human capital).
Q3. A new drug extends survival for people with a chronic kidney disease but does not cure it. Assuming no change in how many people develop the disease, what will happen over the next decade?
Incidence counts new cases, which are unchanged. Prevalence counts all existing cases, and it rises when people live longer with a disease, even without new cases increasing.
Q4. A study finds that one racial group has higher rates of hypertension than another. Which additional analysis would best test whether socioeconomic status explains the difference?
Comparing groups within the same SES levels (or adjusting statistically for SES) tests whether SES confounds the association. If the gap disappears, SES largely accounts for it; if it persists, other factors such as discrimination-related stress may contribute.
Q5. Researchers find that countries with higher average income have lower average rates of a disease and conclude that any wealthier person within those countries will have lower risk. This reasoning is an example of:
Drawing conclusions about individuals from data aggregated at the group (country) level is the ecological fallacy. Group-level associations may not hold for individuals.
Quick Recap
- Spatial inequality: segregation, neighborhood effects, food deserts, environmental justice, rural vs urban disadvantage.
- SES = income + education + occupation; wealth is more unequal than income.
- Caste (closed) vs class (open) systems; meritocracy is an ideal.
- Economic, human, cultural (Bourdieu) and social capital (bonding vs bridging); strength of weak ties; social reproduction.
- Absolute vs relative poverty, social exclusion; intersectionality.
- Social gradient in health; mechanisms: material conditions, behaviors, chronic stress (allostatic load, weathering), access to care; fundamental cause theory.
- Health disparities (outcomes) vs health care disparities (access and quality).
- Incidence = new cases / population at risk; prevalence = all cases / population. Watch for SES confounding and the ecological fallacy.