triggers of substance abuse slip and relapse during outpatient treatment in methadone/buprenorphine maintenance therapy clinics: a predictive model with emphasis on treatment-related factors

background: most addicts relapse in the first year of treatment especially in the first 3 6 months, which is the most vulnerable period.[objectives]the present study aimed to assess the predictors of substance abuse slip and relapse among addicts in the first 6 months of treatment with an emphasis on treatment related factors.[methods]the data of this crosssectional study collected through assessment of 148 patients who were referred to the methadone/buprenorphine maintenance therapy clinics of kermanshah city during april to september of 2015. demographic, history, treatment checklist, comorbidity index, and medical records were used for collecting data. data was analyzed through chisquare, ttest, and binary logistic regression analysis.[results]the mean age of total participants was 42.4 ± 11.3 years and 98% of them were male. 27% and 35.1% of the patients, respectively, had a slip and relapse during the first 6 months of treatment. after adjustment for all demographic data, it was indicated that selfemployment (p = 0.037), more treatment costs (p = 0.049), previous treatment history (p = 0.027), not satisfied dose of medication (p = 0.012), and lack of medical therapy history under physicians supervision (p = 0.046) can increase the possibility of a slip significantly.[conclusions]despite the fact that prevention of reabuse and relapse of disease includes multifactorial approach, it seems that the treatmentrelated factors are as the most major factors in relapse and slip during the first 6 months of treatment. health practitioners’ special attention to treatment related factors in addiction, especially previous treatment history as the most important predictor of relapse, are probably effective in the control and decrease of a slip and relapse.