Social class affects health because social and economic position influences exposure to risks, access to resources, living conditions, working conditions, healthcare and opportunities to maintain health. Health inequalities are differences in health outcomes between social groups, and socioeconomic position is consistently associated with many measures of morbidity and mortality. The mechanisms are complex and operate across the life course.
People with fewer economic resources may experience greater exposure to poor housing, insecure employment, environmental hazards, financial stress and limited access to health-promoting resources. People with greater resources may have more opportunities to obtain nutritious food, stable housing, recreational facilities and healthcare. These relationships are not simply the result of individual choices. Social class structures the conditions within which choices are made. At the same time, class does not determine an individual's health outcome because genetics, behaviour, environment, healthcare, social relationships and chance also contribute.
Material conditions are a major pathway between class and health. Income and wealth influence the quality of housing, food, heating, transport and neighbourhood environment that households can afford. Poor-quality housing can expose people to damp, cold, overcrowding or other hazards, while insecure housing can create chronic stress. Financial insecurity can make it difficult to replace broken equipment, maintain adequate heating or afford travel to appointments.
Food costs can also influence diet, although dietary patterns depend on culture, knowledge, availability and time as well as income. Access to safe outdoor spaces and recreational facilities may vary between neighbourhoods. These material conditions can accumulate across childhood and adulthood. The material explanation of health inequality therefore emphasises the physical resources people possess and the environments in which they live rather than treating health simply as an individual responsibility.
Working conditions connect occupational class to health. Different occupations expose workers to different physical, chemical, ergonomic and psychosocial hazards. Manual workers may experience greater exposure to heavy lifting, repetitive movements, machinery, noise or hazardous substances, while office workers may experience prolonged sitting, screen-based work or different forms of stress. Employment insecurity, low control over working hours and unpredictable schedules can also affect wellbeing.
Higher-status occupations are not necessarily free from health risks because professional and managerial workers can experience long working hours, high responsibility and chronic work pressure. Occupational health therefore depends on both the type of work and the degree of control workers have over their conditions. Employment protections, regulation, union representation and workplace safety standards can modify these relationships.
Stress provides another important mechanism linking socioeconomic position with health. Financial insecurity, unemployment, debt, housing problems and insecure employment can create chronic psychological demands. Repeated exposure to stress can affect sleep, behaviour and physiological systems involved in cardiovascular and metabolic health. The concept of allostatic load is sometimes used to describe the cumulative physiological burden associated with repeated or chronic stress.
Social class can influence stress not only through material hardship but also through perceived control, job autonomy and exposure to unpredictable circumstances. People with greater resources may have more capacity to respond to unexpected problems because savings, social networks or flexible employment can provide buffers. This does not mean that affluent people are immune from stress or illness. Rather, socioeconomic resources can alter the frequency, severity and consequences of particular stressors.
Education and health are closely connected with social class. Educational attainment can provide knowledge about health, employment opportunities, income and access to institutions. More education is often associated with healthier behaviours and better health outcomes, but this relationship is not simply a matter of knowledge. Education can lead to occupations with safer conditions and greater autonomy, increase income and improve access to social networks. Health can also affect education and employment in the opposite direction.
Childhood illness or disability can disrupt education, while poor health in adulthood can reduce employment opportunities and income. This bidirectional relationship means researchers must avoid assuming that socioeconomic position always causes health differences in a single direction. Health and social class can influence one another across the life course.
Access to healthcare can contribute to class-related health differences, although the strength of this mechanism depends on the healthcare system. In systems where healthcare is largely financed through taxation or social insurance, direct financial barriers may be lower than in systems relying heavily on private payment. Nevertheless, socioeconomic differences can still influence access through transport, appointment flexibility, health literacy, waiting arrangements, digital access, ability to take time away from work and differences in navigating institutions.
Wealth can also facilitate access to private services where these exist. Healthcare therefore matters, but health inequalities often originate partly outside healthcare through housing, employment, education, income and environmental conditions. Public health research consequently emphasises social determinants of health rather than treating medical treatment as the only relevant factor.
Health inequalities can accumulate across the life course and between generations. Childhood poverty can affect nutrition, housing, exposure to stress, educational opportunities and later employment, which can subsequently influence adult health. Parents' socioeconomic circumstances can therefore affect children's health directly through material conditions and indirectly through education and employment pathways. Intergenerational patterns can continue when poor health limits economic opportunities.
At the same time, social mobility can change exposure to risks, and protective relationships, effective healthcare and public services can interrupt disadvantage. Class should also be considered alongside gender, ethnicity, disability, age and geography because these dimensions can interact. The same socioeconomic position may produce different health experiences depending on other social and biological circumstances.
Social class is therefore a major social determinant of health because it shapes material resources, occupational exposure, housing, stress, education, neighbourhoods and access to services. The relationship is probabilistic and multidimensional rather than deterministic. Improving health equality can involve interventions outside medicine, including housing policy, employment protection, income support, education, environmental regulation, transport and community services. Individual health behaviours remain relevant, but sociological analysis asks why opportunities to engage in health-promoting behaviour are unevenly distributed and why exposure to health risks is socially patterned. Understanding class-related health inequalities consequently requires examining the wider social conditions in which people are born, grow, work, live and age.
