Table 2.

Zero order correlations among key variables. Values for men (upper number) and women (lower number) are shown separately.

Variable	PSQI	Sleep duration	Sleep latency	Sleep efficiency	Positive relations	IL-6
PSQI global score
Actigraphy
Sleep duration	–0.05
	–0.17*
Sleep latency	0.18*	–0.35***
	0.23**	–0.23***
Sleep efficiency	–0.26**	0.70***	–0.72***
	–0.37***	0.53***	–0.60***
Positive relations with others	–0.25***	–0.05	–0.19*	0.16*
	–0.18***	0.10	–0.12#	0.19**
Serum IL-6	0.11*	0.07	0.02	–0.07	0.03
	0.14***	–0.18**	0.25**	–0.29***	–0.09*
Serum E-selectin	0.15**	–0.11	–0.05	–0.07	–0.06	0.18***
	0.11**	–0.04	0.06		–0.13**	0.20***

^#P < 0.10

^*P < 0.05

^**P < 0.01

^***P < 0.001.