Table 4.

Mediation Effect

Variable	Safety Performance						Negative Emotions		Work Engagement
	Model 1	Mode 2	Model 3	Model 4	Model 5	Model 6	Model 7	Model 8	Model 9	Model 10
Age	0.011	0.025	0.006	0.022	−0.005	0.014	−0.046	−0.059	−0.007	0.007
Education	−0.035	−0.031	−0.041	−0.028	−0.046	−0.03	−0.029	−0.033	−0.013	−0.008
Length of service	0.063	0.051	0.038	0.025	0.045	0.03	−0.053	−0.041	0.083	0.07
LMX mean	0.109*	0.104*	0.056	0.016	0.053	0.008	−0.157**	−0.153**	0.250***	0.245***
LMXD		−0.241***	−0.170**	−0.152**				0.228***		−0.246***
Negative emotions			−0.314***		−0.353***
Work engagement				0.361***		0.401***
R2	0.018	0.076	0.166	0.190	0.139	0.168	0.032	0.083	0.070	0.131
ΔR2	0.018	0.058	0.090	0.114	0.121	0.150	0.032	0.051	0.070	0.060
F	1.638	5.780***	11.639***	13.648***	11.355***	14.183***	2.902*	6.389***	6.653***	10.542***

Notes: ***p 0.001 level, **p, 0.01 level, *p, 0.05 level.

Abbreviations: LMX, leader-member exchange; LMXD¸ leader-member exchange differentiation.