A Study of Predictive Factors of Treatment Response to Sertraline in Patients with Obsessive-Compulsive Disorder

Yoo, Eun Jung; Woo, Haing Won; Kim, Young Chul; Yun, Kyu Wol; Kim, Jong Won; Lim, Weon Jeong

Abstract

OBJECTIVES
The pharmacologic treatment of obsessive-compulsive disorder(OCD) with serotonergic antidepressant agents is well established in clinical psychiatry on the basis of serotonin hypothesis. Studies on predictive factors of treatment response to OCD are relatively scarce. The author compared the demographic factors, age of onset, length of illness, family history of mental illness, previous drug history for OCD, severity and type of symptoms between the drug responders and non-responders to find out the predicitive factors that may be related to treatment response.
METHODS
The subjects were 31, both inpatients and outpatients who met the diagnostic criteria for OCD by DSM-IV and scored 20 or higher on the Yale-Brown Obsessive-Compulsive Scale(Y-BOCS) completed 12-week trial of sertraline. Y-BOCS, National Institute of Mental Health Obsessive-Compulsive Scale(NIMHOCS), Clinical Global Impression Scale(CGI) were scored to measure the changes of obsessive-compulsive symptoms, and Hamilton Anxiety Scale(HAM-A) was measured at each visit.
RESULTS
1) The responders, defined as achieving at least a 40% decrease in the Y-BOCS total score and more than a 2 point decrease in CGI score, were 17(54.8%), and non-responders were 14(45.2%). Responders tended to show later onset(p<0.1), and shorter duration of illness(p<0.05), and less previous drug therapy for OCD(p<0.05) than non-responders. There were no significant differences in family history of mental illness between the two groups. 2) The baseline Y-BOCS compulsive score was significantly lower in responders(p<0.05), although there was no significant difference in the baseline severity of other measures. 3) The obsession of contamination and washing behaviors were more frequent, but compulsive counting was not shown, in responders(p<0.05). The pathological doubt tended to be more common in nonresponders(p<0.1).
CONCLUSIONS
In summary, the patients with shorter duration of illness, less prior drug therapy for OCD, and less severe compulsive behaviors, and the obsession of contamination and washing behaviors are expected to be better outcome with sertraline, whereas compulsive counting are the predictor of poor response.