Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 7 1 2012 03 15 31 5 Ruhollah Shabanpour Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, IRAN. Ali Reza Zahiroddin Masoud Janbozorgi Padideh Ghaeli PharmD Associate Professor of Clinical Pharmacy, Faculty of Pharmacy and Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, IRAN 2015 10 14 Objective: The aim of this study was to compare defense styles and mechanisms in adult patients suffering from obsessive-compulsive disorder (OCD), and panic disorder (PD) with normal subjects in Iran . Methods: Defensive patterns of 22 patients with OCD, 28 patients with PD and those of 116 normal individuals (as a control group) were assessed using the Farsi version of Defense Style Questionnaire-40 (DSQ-40). The content validity of this questionnaire was done prior to the initiation of the present study. Results: Both groups of patients with OCD or PD used more immature and less mature styles compared to the control group. No significant difference was observed in the use of neurotic style between the two groups . Conclusion: It is suggested that immature defenses may have an important role in the pathogenesis of OCD and PD. https://ijps.tums.ac.ir/index.php/ijps/article/view/227 https://ijps.tums.ac.ir/index.php/ijps/article/download/227/223