Table 1.

Demographic data of the sample, N = 130.

	Frequency (%)	M (SD)	Min/Max
Age		43.31 (11.09)	18/64
Female	28 (21.53%)
Male	102 (78.46%)
Educational background
No degree	6 (4.61%)
Basic degree	11 (8.46%)
Secondary school (10th class or vocational training)	80 (61.53%)
High school	27 (20.76)
University diploma	6 (4.61)
Number of SUD diagnoses *		2.27 (1.002)	1/6
1	26 (20.0%)
2	63 (48.5%)
3 or more	41 (31.5%)
Number of psychiatric diagnoses		0.68 (0.828)	0/4
0	64 (49.2%)
1	50 (38.5%)
2 or more	16 (12.3%)

Demographic characteristics of the sample, frequencies, and percentages of co-morbidities regarding psychiatric diagnoses in the patients; tobacco addiction was not included in the calculation. * We excluded nicotine dependence from the SUD diagnoses as tobacco smoking was not prohibited in the clinic and, hence, patients were not checked on abstinence from nicotine uptake.