Table 3.

Hierarchical regression analyses predicting mental well-being.

Variables	R	R2	Adjusted R2	$\beta$	t	F change	F
Step 1
Job position	.27	.07	.05	–		3.08	3.08**
Expert				−.31	−2.38*
Senior expert				−.33	−2.75*
Manager				−.27	−2.49***
Step 2
Job strain	.38	.14	.12	.26	4.85**	23.57	5.57**
Step 3
Sleep quality	.56	.31	.29	.36	8.59**	73.92	13.64**
Work-life balance	.59	.35	.33	−.20	−4.26**	18.21	14.79**
Exercise	.60	.37	.34	−.12	−2.51*	6.30	14.33**
Decision latitude	.61	.38	.35	−.12	−1.99*	3.97	13.67**

*p$<$ .05, **p$<$ .01.