What Are Social Determinants of Health?

Social determinants of health, in two sentences

Health is often discussed as if it were only about hospitals, doctors and personal habits. Those matter, but they are only part of the picture: public health research also looks at the conditions around people — the home they live in, the school system they went through, the income their household has, and the services available in their area. Those conditions are called social determinants because they help determine, at population level, how health patterns differ between groups.

The 5 domains of social determinants of health

Economic stability

Income, poverty, employment and food security. Money shapes what a household can afford: housing, food, transport and services.

Education access and quality

Schooling, literacy and adult learning. Population research links education to literacy, employment patterns, and how easily people can find and use information and services.

Health care access and quality

Whether services exist, whether people can reach them, and whether they can afford them.

Neighbourhood and built environment

Housing, transport, green space, air and water quality. Neighbourhoods differ in services, transport, green space and environmental quality, and population health patterns vary by place even within the same country.

Social and community context

Social support, discrimination, segregation and community ties. These shape health across groups, not only for individuals.

How does income affect health?

Income works through several routes at population level. First, access to basic resources: income shapes what a household can afford — housing, food, transport and services. Second, financial insecurity is studied as a population stressor: groups facing persistent money pressure show different average health patterns. Third, income shapes options: where people can live, what food is available nearby, and how easily they can reach services. None of this is a judgement about any one household; it is a description of how groups differ on average.

How does housing affect health?

Housing is studied at population level through stability (whether households can stay in one place), crowding (how many people share a space), and the physical condition of homes. Neighbourhood conditions matter too: services, transport, green space and environmental quality. A household facing housing instability may also face income pressure and transport barriers, so researchers study determinants together, not as separate unrelated causes.

Social determinants of health in poverty

Poverty cuts across all five domains at once: it limits income, housing options, education access and service use together. The WHO Commission on Social Determinants of Health set out three principles in plain words: improve daily living conditions; tackle the inequitable distribution of power, money and resources; and measure the problem so it can be tracked. Kerala in India is often cited as a case where investment in living conditions, education and accessible healthcare went together with strong population health outcomes. Brazil is cited by WHO for progress through improved living conditions and accessible healthcare. Both are population-level cases, not promises for any individual.

Health equity — what “fair” means here

Health equity means everyone has a fair opportunity to attain their full health potential. It is different from equality: equality gives everyone the same thing, equity gives people what they need to reach the same opportunity. The social gradient runs through all of this — the lower a group’s socioeconomic position, the poorer its health on average, in every country.

What the WHO Commission recommended

The WHO Commission on Social Determinants of Health recommended three things: improve daily living conditions; tackle the inequitable distribution of power, money and resources; and measure and understand the problem. WHO frames social determinants as responsible for 30–55% of health outcomes — an estimate range, not a precise figure. Medical care is estimated to account for only 10–20% of the modifiable contributors to population health, with social determinants accounting for 80–90% — again an estimate range, cited from CDC-linked research, not a precise measurement.

Frequently asked questions

Do social determinants matter more than healthcare?

Medical care is one part of population health. Social determinants shape most of what determines population health patterns — the 10–20% / 80–90% framing above is an estimate range from CDC-cited research, not a precise figure.

Are social determinants about one person’s choices?

No. This article describes groups and systems, not any individual’s choices or outcomes.

Where can I see population figures?

In the WHO Global Data Explorer, which shows dated, sourced population figures.