Social Determinants and Health Equity
The social determinants of health are the conditions in which people are born, grow, live, work, and age, together with the wider social, economic, and political forces that shape those conditions. This area orients the learner to how these non-medical factors drive systematic, avoidable differences in health between population groups, and to the related ideal of health equity.
Definition
Social determinants of health are the non-medical, societal conditions and the structural drivers that distribute power, money, and resources, and that thereby shape health outcomes and their unequal distribution across populations.
Scope
The area frames the upstream, structural causes of health and disease and the distributional question of who gets sick and why, rather than the biology of any single condition. It introduces the conceptual vocabulary of determinants and equity and links to its topic entries on poverty and income inequality, water and sanitation, education and health literacy, and occupational and environmental exposures. It is reference and educational in nature, not a basis for individual clinical or policy decisions.
Sub-topics
Core questions
- Which social, economic, and environmental conditions most strongly shape population health?
- What is the difference between a health inequality (any difference) and a health inequity (an unfair, avoidable difference)?
- How do upstream structural factors translate into downstream differences in disease and mortality?
- How can action on determinants be organized across sectors rather than only within health care?
Key concepts
- Health equity versus health equality
- Health inequity (unfair and avoidable)
- Upstream and downstream causes
- Social gradient
- Structural and intermediary determinants
- Intersectoral action and Health in All Policies
- Causes of the causes
Key theories
- Social gradient in health
- Health follows a graded relationship with social and economic position across the whole population, so that each step down the hierarchy tends to carry worse health, not merely a contrast between the poorest and everyone else.
- Structural and intermediary determinants framework
- The WHO conceptual framework distinguishes structural determinants (socioeconomic and political context, social position) from intermediary determinants (material circumstances, behaviours, the health system) through which structural forces act on health.
Mechanisms
Structural determinants such as the distribution of income, education, and political power shape an individual's social position, which in turn governs exposure to intermediary determinants: material living conditions, psychosocial stressors, behaviours, and access to and quality of health care. These pathways accumulate across the life course and concentrate disadvantage, producing the graded relationship between social position and health that Marmot and the WHO Commission describe. Because the determinants lie largely outside the health-care system, addressing them is framed as requiring action across many sectors.
Clinical relevance
Understanding the social determinants helps health professionals interpret why disease burden differs across populations and why clinical outcomes vary beyond what biology or care alone explains. The area describes the population-level forces behind these patterns for educational and reference purposes; it is not guidance for individual diagnosis, prescribing, or treatment.
Epidemiology
Differences in health by socioeconomic position, place, and social group are observed worldwide and across the whole social hierarchy rather than only at the extremes, a pattern documented in the work of Marmot and colleagues and synthesized by the WHO Commission on Social Determinants of Health. Braveman and colleagues review the consistent socioeconomic patterning of morbidity and mortality and the conceptual basis for measuring equity.
Evidence & guidelines
The WHO Commission on Social Determinants of Health (2008) provides the principal global synthesis and call to action, and the WHO conceptual framework paper (2010) formalizes the determinants model. Braveman and Gruskin (2003) offer a widely used operational definition of health equity. These are framing and reference documents rather than clinical practice guidelines.
History
Concern with the social patterning of disease dates to nineteenth-century social medicine, but the modern field was crystallized by the Whitehall studies of the British civil service, the 1980 Black Report on inequalities in health in the United Kingdom, and the WHO Commission on Social Determinants of Health, whose 2008 report Closing the Gap in a Generation set health equity as an explicit global goal.
Debates
- Equity as a measurable concept
- Defining health equity in a way that is both ethically grounded and operationally measurable remains contested; Braveman and Gruskin frame it as the absence of systematic, avoidable differences linked to social disadvantage, but applying that definition in practice requires value judgements about what is fair.
Key figures
- Michael Marmot
- Paula Braveman
- Sir Douglas Black
- Nancy Krieger
Related topics
Seminal works
- marmot-2008
- marmot-2005
- braveman-2003
- braveman-2011
Frequently asked questions
- What is the difference between a health inequality and a health inequity?
- A health inequality is any measurable difference in health between groups. A health inequity is the subset of those differences that is systematic, socially produced, and considered unfair and avoidable.
- Why are social determinants called the causes of the causes?
- Because they are upstream forces, such as income, education, and living conditions, that shape the more proximate behavioural and biological causes of disease, they are described as the causes behind the immediate causes.