What is health equity?

Health equity versus health equality

Equity and equality are related but distinct. Equality means giving every group the same resources; equity means distributing resources according to need so that everyone can reach a comparable level of health. Because groups start from different positions, treating everyone identically can entrench existing gaps. The World Health Organization frames health equity as the absence of unfair and avoidable differences, distinguishing such inequities from natural variation. The closely related term health disparity (or health inequality) names the measurable difference itself; inequity adds the judgement that the difference is unjust and could in principle be prevented.

How health equity is measured

Researchers quantify equity by stratifying health outcomes across social groups and comparing them. Common approaches include measuring gaps in life expectancy, mortality or disease frequency between the most and least deprived populations, and summary indices such as the slope and relative indices of inequality. Outcomes are disaggregated by dimensions such as income, education, ethnicity, sex and area-level deprivation. Persistent, patterned differences that track these social gradients are read as evidence of inequity rather than chance, and they direct attention to the social determinants of health that produce them.

Significance and standards

Health equity is a core goal of modern public-health practice and policy. The WHO Commission on Social Determinants of Health (2008) argued that social injustice is "killing people on a grand scale" and set out equity as an organising aim. National frameworks such as the United States Healthy People initiative include eliminating health disparities and achieving health equity among their overarching objectives.

Equity is also embedded in global goals: the Sustainable Development Goals call for reducing inequalities and ensuring healthy lives for all. As a standards concept, equity asks that data be collected and reported in disaggregated form so that hidden gaps become visible and accountable.

Methods and context

Studying equity well depends on good measurement of social position and careful attention to whose data are missing. An "equity lens" in research means planning, from the outset, to disaggregate findings by relevant social dimensions rather than reporting only population averages, which can mask divergent experiences. Frameworks such as PROGRESS-Plus (place, race, occupation, gender, religion, education, socioeconomic status, social capital and other factors) give a structured checklist of dimensions to examine, helping researchers report results in ways that surface inequity rather than conceal it.