Abstract
BackgroundThe nation-wide epidemiological survey of psychiatric disorders in term of lifetime prevalence is not adequately known in Iran. The prevalence of lifetime psychiatric disorders was estimated among the population of aged 18 and over on gender, age group, educational level, occupational status, marital status, and residential area.MethodsThe subjects were 25,180 individuals selected through a clustered random sampling method. The psychiatric disorders were diagnosed on the bases of Diagnostic and Statistical Manual of Mental Disorders-IV criteria. It is the first study in which the structured psychiatric interview administered to a representative sample of the Iranian population age 18 and over by the 250 trained clinical psychologist interviewers. The data was entered through EPI-Info software twice in an attempt to prevent any errors and SPSS-11 statistical software was also used for analyses. The odds ratios and their confidence intervals estimated by using logistic regression.Results and DiscussionThe prevalence of psychiatric disorders was 10.81%. It was more common among females than males (14.34% vs. 7.34%, P < 0.001). The prevalence of anxiety and mood disorders were 8.35% and 4.29% respectively. The prevalence of psychotic disorders was 0.89%; neuro-cognitive disorders, 2.78% and dissociative disorders, 0.77%. Among mood disorders, major depressive disorder (2.98%) and among anxiety disorders, phobic disorder (2.05%) had the higher prevalence. The prevalence of psychiatric disorders among divorced and separated 22.31%; residents of urban areas 11.77%; illiterates 13.80%; householders 15.48%; unemployed 12.33% that were more than other groups.ConclusionThe mental health pattern in Iran is similar to the western countries, but it seems that the prevalence of psychiatric disorders in Iran may be lower than these countries.It is estimated that at least about 7 millions of Iranian population suffer from one or more of the psychiatric disorders. It shows the importance of the role of the psychiatric disorders in providing preventive and management programs in Iran.
Highlights
The nation-wide epidemiological survey of psychiatric disorders in term of lifetime prevalence is not adequately known in Iran
The lifetime prevalence of psychiatric disorders was assessed according to DSM-IV [6] by means of the Schedule for Affective Disorders and Schizophrenia (SADS) [7,8]
Data regarding prevalence of the psychiatric disorders in terms of age group, gender, marital status, educational level, occupation, and residential area are presented in table 1
Summary
35,014 individuals at 15 years of age and over were assessed by General Health Questionnaire (GHQ-28). It showed that 21% of the subjects suffered from psychiatric symptoms. Predicted estimations of prior studies in other countries, disregard to their diversity of goals and purposes, reported up to 46% of general population [5]. These variations may be due to diversity of screening methods, diagnostic tools, sampling methods and cultural differences between populations sampled
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