title: Duodenal ulcer, urban stress and the concept of 'marginal man'.
abstract: The increasing incidence of duodenal ulcer among Blacks, and the incidence at Ga-Rankuwa Hospital, Pretoria, are discussed. The role of urbanization and urban stress is considered, and the concept of 'marginal man' in relation to urban stress is outlined. A plea is made for the utilization of this concept in the study of the problem.
mesh_terms: D000069:Acculturation; D000328:Adult; D001741:Black or African American; D044383:Black People; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D013019:South Africa; D013315:Stress, Psychological / Q000150:complications*; D014505:Urban Population