Table 3.

Mediated regression analysis for PS and ISI on PTSD.

Variable	Model 1 (PTSD)		Model 2 (ISI)		Model 3 (PTSD)
	β	t	β	t	β	t
PS	0.458	11.685***	0.482	12.458***	0.163	4.564***
ISI					0.613	17.190***
R2	0.210		0.232		0.499
F	136.541***		155.216***		255.143***

PS, perceived stress; ISI, insomnia severity index; CF, compassion fatigue.

^***P < 0.001.