Table 5

Multiple hierarchical linear regression models of variables

Variables	Psychological stress		Sleep quality				Subjective health
Variables	M1	M2	M3	M4	M5	M6	M7	M8	M9	M10
Control variables
Age	0.019	0.065	0.059	0.068	0.024	0.053	−0.029	−0.021	−0.070	−0.042
Gender	−0.001	−0.026	−0.009	−0.011	0.007	−0.005	0.013	0.012	0.032	0.022
Service years	−0.057	−0.061	0.007	−0.020	0.011	−0.016	0.076	0.048	0.082	0.056
Education	0.041	0.039	0.072**	0.093***	0.074***	0.092***	0.042	0.062**	0.044	0.060**
Marital status	0.028	0.033	−0.039	−0.025	−0.041	−0.027	−0.039	−0.025	−0.042	−0.028
Professional categories	0.090**	0.043	−0.044	0.000	−0.010	0.010	−0.081*	−0.038	−0.042	−0.024
Mediating variable
Psychological stress				−0.488***		−0.448***		−0.479***		−0.424***
Independent variable
WPV		0.378***			−0.275***	−0.106***			−0.307***	−0.146***
F	4.099***	55.047***	2.163*	97.365***	26.769***	89.137***	2.130*	93.109***	33.397***	89.762***
R ²	0.011***	0.153***	0.006*	0.242***	0.081***	0.250***	0.006*	0.233***	0.098***	0.251***
ΔR ²	0.011***	0.141***	0.006*	0.236***	0.075***	0.244***	0.006*	0.227***	0.093***	0.246***

*p<0.05; **p<0.01; ***p<0.001 (two-tailed).
WPV, workplace violence.