A group of islands in the Atlantic Ocean west of Scotland, comprising the Outer Hebrides and the Inner Hebrides.

A stratum of people with similar position and prestige; includes social stratification. Social class is measured by criteria such as education, occupation, and income.

The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.

A system of medical care regulated, controlled and financed by the government, in which the government assumes responsibility for the health needs of the population.

A pathological condition caused by lack of oxygen, manifested in impending or actual cessation of life.

Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.

Social and economic factors that characterize the individual or group within the social structure.

An area of recreation or hygiene for use by the public.

The number of males and females in a given population. The distribution may refer to how many men or women or what proportion of either in the group. The population is usually patients with a specific disease but the concept is not restricted to humans and is not restricted to medicine.

A medical specialty concerned with the provision of continuing, comprehensive primary health care for the entire family.