Introduction: Substance abuse is a widespread issue in the present era turned into a social and sanitary problem as to its increasing variety and a multilateral and suitable consideration is required to prevent and solve this problem. Therefore, the present study attempts to compare psychological conditions of personality disorders in addicts treated under NA association and TC centers. Materials and Methods: Research method is causative-comparative and the sample includes 213 individuals (107 clients of NA association and 106 clients of TC centers) in Mashhad city selected by convenience sampling method during first second half of 2017. They fulfilled two demographic questionnaires and Millon Clinical Multiaxial Inventory. Results: Findings obtained from the analysis of comparing two independent groups showed that NA group had better conditions than TC clients group in terms of psychological and personality disorders and they had significant difference statistically

Keywords