A PRELIMINARY INVESTIGATION OF THE LIFETIME PREVALENCE OF ANOREXIA AND BULIMIA-NERVOSA IN PATIENTS WITH OBSESSIVE-COMPULSIVE DISORDER

Background: Obsessive compulsive disorder (OCD) is currently classified as an anxiety disorder although it possesses many characteristics that distinguish it from other anxiety disorders. Clinically and neurobiologically, OCD appears to overlap somewhat with the eating disorders. Method: To assess in a controlled fashion the lifetime prevalence of the eating disorders in patients with OCD, we administered portions of the Structured Clinical Interview for DSM-III-R, Patient Version (SCID-P), to 62 patients (31 men, 31 women) with a primary DSM-III-R diagnosis of OCD. Results: Among the OCD patients, the lifetime prevalence of anorexia nervosa and/or bulimia nervosa was 12.9 % (N = 8), and an additional 17.7 % (N = 11) met subthreshold criteria for either anorexia or bulimia nervosa. Interestingly, unlike multiple epidemiologic studies that have r e ported a substantial female preponderance among patients diagnosed with anorexia or bulimia nervosa, there was no significant gender difference in the lifetime prevalence of eating disorders among the patients with OCD. Almost 13% (N = 4) of the men and 6.5% (N = 2) of the women with OCD met criteria for a lifetime diagnosis of anorexia nervosa and 3.2 % (N = 1) of the men and 6.5% (N = 2) of the women with OCD met criteria at some time in their lives for bulimia nervosa. In addition, subthreshold criteria for anorexia nervosa or bulimia nervosa were met by an additional 12.9% (N = 4) of the men and 22.6 % (N = 7) of the women. Conclusion: These data suggest that OCD patients, regardless of gender, have a substantial lifetime prevalence of anorexia and/or bulimia nervosa.