Abstract

The term 'primary health care' (PHC) has come into widespread use by policy-makers, managers and health professionals in the past two decades. There is a variety of definitions and an even wider variety of uses of the term. The purpose of this paper is to examine critically existing definitions and uses, with a particular focus on their usefulness in health policy, clinical practice and research relating to health care systems. The paper has three parts. First, we examine the principal types of definition and identify core features of primary care common to most definitions. Second, we discuss the application of these criteria to a range of services in the UK National Health Service (NHS). Lastly, we examine the ways in which policymakers, health professionals, researchers and lay people use the term, also drawing primarily on UK experience. We conclude by reflecting on the likelihood of achieving a single unambiguous definition and the usefulness of the term for different purposes.