Risk of Relapse Assessment Scale for Metamphetamine Abusers: Reliability and Validity Study of the Turkish Version

Background: This study aims to investigate the validity and reliability of the Turkish adaptation of the 16-item Risk of Relapse Assessment Scale (RRAS) for methamphetamine abusers. Methods: A total of 160 patients diagnosed with methamphetamine use disorder were included in this study to evaluate the validity and reliability of the scale. The comparison of the relationship between the Risk of Relapse Assessment Scale, the Substance Craving Scale, and the Relapse Prediction Scale was also carried out. The validity of the Risk of Relapse Assessment Scale was examined in the first step by exploratory factor analysis. The suitability of the data for exploratory factor analysis was evaluated by Kaiser-Meyer-Olkin test and Barlett's test. Cronbach's a coefficient and corrected itemtotal correlation value were used to test the reliability of the scale. The validity results of Risk of Relapse Assessment Scale were tested by confirmatory factor analysis. The significance level was set at P < .05 for all analyses. Results: Considering the examination of the internal consistency values of the Risk of Relapse Assessment Scale, Cronbach's a value was detected to be 0.90, and Cronbach's a value of the subscales ranged from 0.72 to 0.90. The study determined that the goodness of fit values for RRAS were x(2)/df = 2.13, P <.001, goodness of fit index = 0.88, comparative fit index = 0.92, normed fit index = 0.86, Trucker-Lewis index = 0.90, root mean square error of approximation = 0.08, and standardized root mean squared residual = 0.06. Conclusion: Our findings demonstrate that Risk of Relapse Assessment Scale is a valid and reliable measurement tool for assessing the risk of methamphetamine relapse in Turkish.