Twelve-month prevalence of obsessive-compulsive disorder in Konya, Turkey.

We conducted a household survey of 3,012 adults aged 18 and over in order to estimate the prevalence of DSM-IV obsessive-compulsive disorder (OCD) in urban areas in Konya, Turkey. Trained psychiatry interns administered the 2.1 version of the OCD section of the Composite International Diagnostic Interview (CIDI). The 12-month period prevalence rate of OCD was 3.0%. The mean age of onset of OCD was 25.9 +/- 12.5 (range, 7 to 63) years. The prevalence rate of OCD was slightly higher among females (males 2.5%, females 3.3%), but the difference was not statistically significant. The relative risk for divorced, separated, or widowed subjects was approximately 4.2 times higher for OCD than others (2.7% v 10.5%). The 1-year prevalence of OCD inversely related to age group in male subjects, but increased with age in female subjects. The prevalence rate of OCD was not different by the level of education, except it was statistically higher among subjects who were literate but had no schooling, of which the causal relationship was high prevalence rate of OCD among female literate-but no schooling subjects. Subjects with few (one or two) and more siblings (seven or more) had a significantly higher prevalence rate of OCD than subjects with moderate numbers of siblings (three to six). No significant difference was found according to employment, fertility, birth order, and income of the subjects. About 30% of subjects with OCD had only obsessions, whereas 68.5% had both obsessions and compulsions. Only one subject (1.1%) with OCD met compulsion criteria without obsessions. The prevalence rate of OCD we found in Konya, Turkey was similar to the prevalence rates of most epidemiological studies.