Table 2.

Descriptive statistics of variables in the model and Shapiro–Wilk test of normality (N = 1,118).

	Variables	M (SD)	Min	Max	Skew.	Kurt.	S−W
Substance use	PSU	0.61 (1.17)	0	13	3.51	23.94	0.57*
	PAU	0.33 (0.80)	0	4	2.61	6.12	0.46*
Anxiety and depression symptoms	HADS-A	8.31 (4.78)	0	21	0.39	−0.44	0.08*
	HADS-D	5.90 (4.38)	0	21	0.76	0.04	0.12*
QoL domains	General QoL	3.81 (0.92)	1	5	−0.44	−0.23	0.23*
	Health satisfaction	3.88 (0.99)	1	5	−0.68	−0.04	0.23*
	Physical health	15.77 (3.03)	4.57	20	−0.77	0.33	0.10*
	Psychological health	14.63 (3.50)	4	20	−0.56	−0.38	0.10*
	Social relationships	14.89 (3.69)	4	20	−0.47	−0.35	0.10*
	Environment	15.71 (2.71)	5.50	20	−0.72	0.44	0.08*

PSU, psychoactive substance use increase; PAU, problematic alcohol use; QoL, quality of life; HADS-A, Hospital Anxiety Depression Scale—Anxiety; HADS-D, Hospital Anxiety Depression Scale—Depression; Skew., skewness; Kurt., kurtosis; S−W, Shapiro−Wilk normality test.

^*p < 0.001.