Bilge Evren1, Cuneyt Evren2, Hanife Yılmaz2, Muge Bozkurt2
1Baltalimani State Hospital for Muskuloskeletal Disorders, Department of Psychiatry, Istanbul, Turkey
2Research, Treatment and Training Center for Alcohol and Substance Dependence (AMATEM), Bakirkoy Training and Research Hospital for Psychiatry Neurology and Neurosurgery, Istanbul, Turkey
Objective: Cannabis and synthetic cannabinoid are the most widely used illicit substances in Turkey, particularly among young adults. Previous studies report a range of physical, psychological, social and legal concerns among treatment seekers. The Cannabis Problems Questionnaire (CPQ) was developed from the Alcohol Problems Questionnaire to measure cannabis treatment outcome (Copeland et al., 2005). The aim of the present study was to evaluate the psychometric properties of the CPQ among Turkish male outpatients with cannabis or synthetic cannabinoid use disorder.
Methods: We examined the psychometric characteristics of this instrument in a population of outpatients with cannabis (n=52) or synthetic cannabinoid use disorder (n=45). The participants were evaluated with the CPQ, the Cannabis Use Problems Identification Test (CUPIT), and the Cannabis Withdrawal Symptoms Scale (CWSS).
Results: Three items were deleted because they had low corrected item-total correlation (Item-2, r=0.12, Item-7, r=0.10, Item-10, r=0.22). Cronbach’s alpha was 0.84 for CPQ-A factor, 0.71 for CPQ-B factor and 0.87 for CPQ when considered as unidimensional scale. Principal components analysis supported two factor construct validity for CPQ. CPQ was moderately correlated with the CUBIT (r=0.76) and the CWSS (r=0.74). Items 9, 13, 17 discriminated outpatients with synthetic cannabinoid use disorder from the outpatients with cannabis use disorder.
Conclusions: The findings show that the Turkish version of CPQ can effectively identify cannabis use problems among outpatients with cannabis or synthetic cannabinoid use disorder. Reference Copeland J, Gilmour S, Gates P, Swift W. The Cannabis Problems Questionnaire: factor structure, reliability, and validity. Drug Alcohol Depend 2005;80(3):313-9.