Abstract: Objective   To explore the  gender differences in clinical features of obsessivecompulsive disorder. Methods  A total of 135  patients with obsessivecompulsive disorder  who were admitted to  Linyi  Mental Health Center from January 1, 2018 to December  31, 2019,  including 85 males and 50 females,  were selected.The differences in clinical features of patients with different genders were  assessed by means of selfmade general survey questionnaire and obsessivecompulsive inventoryrevised(OCIR) scale. Results  The age and onset  age of male  patients  were  lower  than those of female  patients（P＜0.01）. The rate of comorbidity generalized anxiety disorder in female patients(20.0%) was higher than 7.06%  in male  patients（P<0.05）.OCIR cleaning, examination, hoarding and subscale scores  and total  OCIR scores  of female  patients were higher than those of male  patients（P<0.05）.The OCIR ranking and  obsessive  subscale scores of male  patients were higher than those of femal  epatients（P<0.01）.Conclusion  There are gender differences in obsessivecompulsive disorder in terms of  age,  age of onset, comorbidity,dimensions and severity of obsessivecompulsive symptoms.

Key words: obsessivecompulsive disorder, sex factors；clinical features