Table 3 Hierarchical multiple linear regression analysis examining the contribution of sociodemographic and clinical variables to each QoL domain (as measured with the WHOQOL-Bref)^a.

	Overall QoL	Psychological	Physical	Social relations	Environmental
Predictors	β	β	β	β	β
Sex	−0.02	−0.07**	0.05	−0.03	0.01
Age	−0.05	−0.10**	0.03	−0.11**	0.06
Marital status (ref: single)
married	0.02	0.01	0.07	0.10	0.03
divorced	0.03	−0.01	0.02	0.04	−0.05
widowed	0.03	0.03	0.01	0.04	0.07
Education (ref: lowest)
middle	0.03	0.00	0.05	−0.05	0.06
high	0.02	−0.04	0.07	−0.06	0.11*
Employment status (ref: employed)
unemployed	−0.07	−0.14**	−0.08**	−0.01	−0.02
on sick leave	−0.06	−0.16**	−0.03	0.04	−0.01
retired	0.01	−0.08*	−0.01	0.03	0.00
Income^b (ref: <12€):
12–24€	0.03	0.01	−0.01	0.03	0.09**
24–36€	0.04	0.06	0.04	0.04	0.11**
>36€	0.09*	0.08*	0.05	0.03	0.15**
Clinical symptoms
Depression (PHQ-9)	−0.40**	−0.30**	−0.64**	−0.49**	−0.23**
Anxiety (GAD-7)	−0.04	−0.11**	−0.11**	0.03	−0.14**
Somatization (PHQ-15)	0.04	−0.29**	0.10*	0.10	−0.03
Step 1 (R²)	0.046	0.114	0.083	0.023	0.107
Step 2 (Δ R²)	0.153	0.350	0.400	0.160	0.118
Model significance (Step 2)	F_16,1219 = 18.88**	F_16,1219 = 66.03**	F_16,1219 = 79.93**	F_16,1219 = 17.07**	F_16,1219 = 22.13**

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