Equity and Access

Equity and access concern how fairly a health system distributes the opportunity to obtain needed care and, ultimately, health itself. Equity refers to the absence of unfair and avoidable differences in health and care between population groups, while access refers to the ability of people to obtain appropriate services when they need them; healthcare disparities are the measurable differences that signal where equity is not being achieved.

Definition

Health equity is the absence of systematic, unfair, and avoidable differences in health and health care across population groups; access is the fit between people's needs and the system's capacity to provide appropriate services in a timely way; and healthcare disparities are the observed differences that reveal inequity.

Scope

The topic covers the concept of health equity, frameworks for understanding access from both the system and population sides, the role of the social determinants of health, and how disparities are conceptualized and measured. It is reference and educational material on how systems distribute access and outcomes; it does not provide individual care advice.

Core questions

• What distinguishes equity from mere equality in health and health care?
• What dimensions determine whether people can actually obtain needed care?
• How do social determinants generate and sustain health disparities?
• How are disparities conceptualized and measured at the system level?

Key concepts

• Health equity
• Equity vs. equality
• Access to care
• Healthcare disparities
• Social determinants of health
• Affordability and financial protection
• Predisposing, enabling, and need factors
• Approachability and acceptability

Key theories

Concepts and principles of equity

Whitehead's foundational distinction between unavoidable health differences and those that are unfair and avoidable, establishing health equity as concerned specifically with the latter and providing a basis for judging when differences signal injustice.

Patient-centred access framework

Levesque and colleagues' framework conceptualizing access at the interface of systems and populations across five dimensions — approachability, acceptability, availability/accommodation, affordability, and appropriateness — each matched to a corresponding ability of the person seeking care.

Behavioral model of health services use

Andersen's model explaining use of services through predisposing characteristics, enabling resources, and need, used to analyse why access and utilization differ across groups.

Social determinants of health

The framing, advanced by the Commission on Social Determinants of Health, that the conditions in which people are born, grow, live, work, and age shape health and that action on these conditions is required to close avoidable health gaps.

Mechanisms

Access can be understood as the fit between what people need and what a system offers: services must be approachable, acceptable, available, affordable, and appropriate, and people must correspondingly be able to perceive need, seek, reach, pay for, and engage with care. Inequities arise when this fit is systematically worse for some groups, often because the social determinants of health — income, education, working and living conditions — shape both health needs and the resources available to meet them. Sustained social disadvantage may also act through biological pathways, with chronic stress contributing to cumulative physiological burden that widens disparities over the life course.

Clinical relevance

Equity and access shape who within a population actually obtains care and who is left behind, which is central to evaluating system performance. This topic describes how systems distribute access and where disparities arise; it is descriptive background for policy and management and is not a basis for individual diagnostic or treatment decisions.

Epidemiology

Health disparities are documented along lines of income, education, race and ethnicity, and geography across many systems, and population studies link cumulative social disadvantage to earlier and greater physiological burden; the social-determinants literature situates these patterns in the broader conditions of daily life rather than in health care alone.

History

Whitehead's 1992 articulation gave health equity a working definition that separated avoidable, unfair differences from unavoidable ones. Andersen's behavioral model, developed from the 1960s and revisited in 1995, provided an enduring framework for analysing service use, while the WHO Commission on Social Determinants of Health (2008) reframed equity as requiring action well beyond the health sector. Levesque and colleagues later integrated supply- and demand-side views of access into a single patient-centred framework.

Debates

Should equity efforts focus on health care or on the social determinants?

Because most variation in health is shaped by conditions outside clinical services, some argue that equity is best pursued through action on social determinants, while others emphasize the health system's own contribution to fair access; the balance of responsibility remains contested.

Key figures

• Margaret Whitehead
• Michael Marmot
• Ronald Andersen
• Jean-Frederic Levesque
• Arline Geronimus

Seminal works

• whitehead-1992
• andersen-1995
• marmot-2008
• levesque-2013

Frequently asked questions

What is the difference between equity and equality in health?

Equality means treating everyone the same, while equity means fairness — focusing specifically on differences that are systematic, avoidable, and unjust, which may require treating groups differently to meet differing needs.

What does access to care actually mean?

Access is the fit between people's needs and a system's ability to meet them — whether services are approachable, acceptable, available, affordable, and appropriate, and whether people are able to perceive need, seek, reach, pay for, and engage with care.