Results
REGRESSION, BEST
Table 
Demographic characteristics of patients in the intervention and control groups
Table 
Characteristics of substance use among patients in the intervention and control groups
As illustrated in Table 
Pre-post-intervention between and within intervention and control groups scores of emotion regulation, GSE, and self-esteem

The multivariate analysis (Table 
Best fitting multiple linear regression model for the reappraisal and suppression scoresr-square = 0.05Model ANOVA: F = 5.03, p = 0.007Variables entered and excluded: age, gender, education, job, marital status, residence, age at start, duration of use, number of substances, LOSr-square = 0.18Model ANOVA: F = 14.50, p < 0.001Variables entered and excluded: age, gender, education, job, marital status, residence, age at start, number of substances, LOSAs regards GSE score, Table 
Best fitting multiple linear regression model for the GSE and self-esteem scoresr-square = 0.26Model ANOVA: F = 22.37, p < 0.001Variables entered and excluded: age, gender, education, job, marital status, residence, age at start, duration of use, LOSr-square = 0.26Model ANOVA: F = 33.72, p < 0.001Variables entered and excluded: age, gender, education, job, marital status, residence, age at start, duration of use, number of substances, LOS