Obsessive compulsive disorders in eating disorders

The aim of this study is to explore current and lifetime prevalence of obsessive compulsive disorders (OCD) in eating disorder (ED) subgroups and subtypes defined by the DSM-IV and to study the chronology of appearance of these disorders taking into account the role played by denutrition.

Current and lifetime prevalence were investigated using the Mini International Neuropsychiatric Interview (MINI) and the Yale-Brown Obsessive Compulsive Scale in a sample of 89 DSM-IV ED patients (58 AN and 31 BN) and 89 matched controls.

Current and lifetime prevalence of OCD in ED was significantly higher than in general population (15.7% and 19% vs. 0% and 1.1%, P<.05). Anorexic patients presented a slightly higher current and lifetime comorbidity than bulimic patients (19% and 22.4% vs. 9.7% and 12.9%, n.s.). Purging anorexia was the diagnostic subtype, which presented the higher prevalences (29% and 43%), followed by restrictive anorexia (16%) and purging bulimia (13%). In the great majority of cases (65%), OCD diagnosis preceded ED diagnosis. Finally, OCD current prevalence and Y-BOCS scores of underweight patients were not significantly higher than normal-weight patients, suggesting that there were only limited links between denutrition and obsessionality.