• The prevalence of obsessive-compulsive disorder was measured in five US communities among more than 18500 persons in residential settings as part of the National Institute of Mental Health (Bethesda, Md)—sponsored Epidemiologic Catchment Area program. Lifetime prevalence rates ranged from 1.9% to 3.3% across the five Epidemiologic Catchment Area sites for obsessive-compulsive disorder diagnosed without DSM-III exclusions and 1.2% to 2.4% with such exclusions. These rates are about 25 to 60 times greater than had been estimated on the basis of previous studies of clinical populations.
Karno M, Golding JM, Sorenson SB, Burnam MA. The Epidemiology of Obsessive-Compulsive Disorder in Five US Communities. Arch Gen Psychiatry. 1988;45(12):1094–1099. doi:10.1001/archpsyc.1988.01800360042006