Table 2.

Predictors of changes in mental distress in patients with SUDs at follow-up (N = 97)^a

Predictor	Beta (95% CI)b	P-value
Socio-demographic variables
Gender (female)	0.10 (-0.22/0.340)	0.561
Age, years	-0.01 (-0.04/0.01)	0.248
Compulsory admission	-0.28 (-0.60/0.05)	0.100
Duration of most problematic substance use, years	0.02 (-0.01/0.05)	0.110
Follow-up variables
Abstinence in the last 30 days of follow-up	0.49 (0.18/0.80)	0.002

^a Mental distress was measured with the Global Score Index (GSI) of the Symptoms Checklist (SCL-90-R). Changes in mental distress were computed by subtracting the GSI determined at follow-up from the GSI determined at admission; a ‘positive score change’ refers to an improvement in mental distress

^b Unstandardized beta coefficient with 95% Confidence Interval (CI) and R² = 0.1, derived from a multiple linear regression with simultaneous entry of variables (the "enter" method)