Table 4.

Hierarchical multiple linear regression analysis results

Variables	Model 1 (β)	Model 2 (β)	Model 3 (β)
Gender	-0.430	-0.100	-0.090
Whether an only child	0.078	0.086	0.067
Practice environment	-0.177	-0.285	-0.243
Job burnout			0.238
R 2	0.043	0.105	0.159
F	8.934***	23.260***	28.120***

Notes: (i) Model 1: the effect of the independent variable on the mediator variable; (ii)Model 2: the total effect of the independent variable on the effect of the dependent variable; (iii) Model 3: the effect of the independent variable and the mediator variable on the dependent variable when they are included together in the regression model; (iv) ***means P < 0.001