Three types of obsessive compulsive disorder in a community sample.

ABSTRACT

Until recently, prior estimates of the prevalence of obsessive compulsive disorder (OCD) have been based on clinical data. The present investigation studied point prevalence and demographic data that pertain to three ritual-based forms of OCD in a sample of the adult general population of the greater St. Louis area. Two hundred fifty male and 247 female subjects were administered a structured interview designed to identify the presence of symptoms associated with OCD according to DSM-III criteria. The overall prevalence rate of OCD was 2.8%. The most prevalent form of OCD involved checking (1.6%), followed by a miscellaneous category that included repeating, counting and collecting rituals (1.0%) and, finally, washing compulsions (.8%). Subjects with OCD did not differ demographically from the rest of the sample except that they were more likely to live in the city. Results indicate that OCD is more prevalent than previously supposed and that checking compulsions may be the most common form of ritual in nonclinical samples.