Table 2.

Stepwise linear regression results for psychological distress.

Variable	n	Psychological distress Median (IQR1)	β2	T	P3	R2 corr. 4	ΔR2 corr. 5
STEP 1
Sex
Female	703	15 (5)	1
Male	833	14 (4)	-0.09	–3.70	<0.001
Age group, years
18–39	693	15 (5)	1
40–59	600	14 (4)	-0.15	-5.81	<0.001
60 and above	243	13 (4)	-0.25	-9.38	<0.001
Income, €/month
<1300	270	16 (5)	1
1300–1799	296	15 (5)	-0.03	-1.02	0.306
1800–2800	474	14 (5)	-0.14	-4.07	<0.001
>2800	496	14 (4)	-0.17	-5.05	<0.001	0.09
STEP 2
HRQoL6			-0.21	-8.69	<0.001	0.15	0.06
STEP 3
Activity level
Inactive	188	15 (6)	1
Minimally active	438	15 (5)	-0.01	-0.25	0.806
HEPA7	910	14 (5)	-0.10	-2.86	0.004	0.15	0.01
STEP 4
Affective valence			-0.15	-6.43	<0.001	0.18	0.03

¹IQR, interquartile range; ²β, standardized regression coefficient; ³p, p-value of t-test; ⁴ R² corr., variance explained by the model (corrected value); ⁵ΔR² corr., change in variance explained by the model (corrected value); ⁶HRQoL, Health Related Quality of Life; ⁷HEPA, Health Enhancing Physically Active.