Co-morbidity of Obsessive Compulsive Disorder and Tourette syndrome

Objectives: tourette syndrome is a disease with vocal and motor tics. this disorder is co-morbid withmany psychiatric disorders, among which obsessive-compulsive disorder is the most common.method: during a one-year period, 30 patients with tourette disorder were studied at an adolescentpsychiatry referral clinic. it was an analytical-descriptive study. subjects were selected by conveniencesampling. the control group was selected from students in tehran schools similar to the first group interms of age and gender. k-sads questionnaire was used to examine the existence of obsessivecompulsivedisorder in both groups. the results were analyzed with spss software.results: the apparent co-morbidity of obsessive-compulsive disorder and tourette syndrome was seen inthis study, such that 53% of patients affected with it had obsessive-compulsive disorder. statisticsobtained was higher compared to earlier data. although this co-morbidity was somewhat different in thetwo genders, it was not considered statistically significant (80% girls and 48% boys).conclusion: more focus should be laid upon the co-morbidity between tourette and ocd. it isrecommended to study patients with tourette syndrome more extensively in terms of co-morbidity withother psychiatric disorders, especially the obsessive-compulsive disorder.