In order to study generalized anxiety disorder, this epidemiological survey was perform ed, using D IS -III (Diagnostic Interview Schedule, version III) Korean version by lay interview ers. Subjects w ere selected according to m ultistage cluster sampling mothod together w ith simple ramdom sampling and 2,865 respondents in Seoul and 1,439 in overall rural area completed the study. The results w ere as follow s : 1) The lifetim e prevalence rate was 3.40% . 2) The lifetim e prevalence rate was nearly triplicated by point prevalence rate. 3) There was a tendency that prevalence rate became increased along w ith age and tim e period. 4) As fo r sex, prevalence rate was significantly higher in women than in men. 5) the mean age of onset o f symptoms was 32.4 years. 6) The mean duration o f symptoms was 74.1 weeks.
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