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1- Assistant Professor in the Department of Clinical Psychology, Zanjan University of Medical Sciences, Zanjan, Iran. Social Determinants of Health Research Center. Zanjan University of Medical Sciences, Zanjan, Iran.
2- MSc in Clinical Psychology, Department of Psychology, Zanjan University of Medical Sciences, Zanjan, Iran.
3- Assistant Professor in the Department of Psychiatry, Zanjan University of Medical Sciences, Zanjan, Iran.
Abstract:  
Background and Purpose of the study
Obsessive-compulsive disorder (OCD) is considered as one of the categories of psychiatric disorders that has the potential to turn into a chronic disease if the necessary treatments are not applied. The main feature of OCD is its embrace of the frequent or intense obsession and compulsion that can induce great pain and suffering in patients. Moreover, as one of the most prevalent abnormalities, depression usually follows OCD. The purpose of the present study is to compare the efficiency of CBT and tDCS treatments along with drug therapy in decreasing the severity of obsession-depression symptoms and improving the quality of life in OCD patients.
Method
This study adhered to a semi-experimental design including pre-test, post-test, and follow-up stage. The statistical population comprised all the patients diagnosed with OCD in Zanjan Province, Iran. Besides, 26 OCD patients, who had referred to Shahid Beheshti Medical Center in Zanjan, were selected using purposive sampling and were randomly assigned to two treatment groups. The subjects of the study completed Y-BOCS, BDI 2, and Quality of Life Questionnaires in the pre-treatment, post-treatment, and follow-up stages (1 month and 2 months after the treatment). ANCOVA and RCI methods were used to measure statistical and clinical significances, respectively. The data were analyzed using SPSS, version 20.
Results
Findings showed no significant difference between the CBT and tDCS groups concerning the symptoms of OCD and depression in the post-test stage (p> 0.05). Conversely, in terms of life quality, there was a significant difference between the CBT and tDCS groups at the post-test phase (p <0.05).
Conclusion
Although the findings of the study did not show any statistically significant difference between CBT and tDCS groups (except for the quality of life variable), the drug therapy-CBT combination proved to be more effective than its drug therapy- tDCS counterpart in the treatment of OCD patients.
Keywords: Cognitive-behavioral therapy (CBT), Transcranial direct current stimulation (tDCS), Obsessive compulsive disorder (OCD)

 
Type of Study: Original | Subject: Cognitive Neuroscience
Received: 2018/06/9 | Accepted: 2019/02/13

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