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In this paper, some of the basic concepts of epidemiology are presented. Their applicability to psychiatry is outlined, and the definitions of terms are given. Various methods of epidemiological investigation are discussed. The background for the development of recent prevalence studies, including advances in diagnostic methods and case ascertainment, are given in some detail, and some recent results are presented. Additional areas of investigation are discussed more briefly.
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Roger Bland (1988) studied this question.
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