Fig. 1.

Data from 706 obsessive-compulsive disorder (OCD) patients re-plotted with permission from Nestadt and colleagues (2009). Disorders assessed were obsessive-compulsive personality disorder (OCPD), generalized anxiety disorder (GAD), major depression (recurrent), tics, pathological skin picking, separation anxiety disorder, pathological nail biting, panic disorder, alcohol dependence, body dysmorphic disorder, substance dependence, trichotillomania, hypochondriasis, bipolar disorder. (a) Co-morbidity rates in a sample of OCD cases – 87.3% of patients met the criteria for another DSM diagnosis (note: this figure is probably higher as only select diagnoses were assessed). (b) The prevalence of specific co-morbid disorders within the OCD cohort.