Health Equity

Health equity is the state in which differences in health that are systematic, avoidable, and unjust have been eliminated. It is distinguished from health equality: equality means giving everyone the same resources, whereas equity means allocating resources according to need so that disadvantaged groups can reach the same health outcomes. A health disparity is the measurable difference that signals inequity when it tracks with social disadvantage.

Equity is a central aim of population science and cancer prevention because disease burden is patterned by race, income, geography, and other social positions, largely through social determinants of health. Framing a problem in equity terms shifts attention from average outcomes to the distribution of outcomes and to the structural causes of gaps.

A pitfall is conflating any group difference with inequity; equity concerns differences that are avoidable and unfair, not, say, age-related differences in disease that are biologically expected. Another is measuring only overall averages, which can improve even as gaps between groups widen — so equity analyses examine subgroup-specific rates and effect modification by social group.

For example, a screening campaign that raises the population average but leaves an uninsured subgroup behind has improved overall rates without advancing health equity.