Table 6.

Associations between PSG sleep measures and evening- and morning levels of stimulated monocytic expression of TNF and IL-6.

	Group	BDI	PCS	TNF 23:00	IL-6 23:00	TNF 8:00	IL-6 8:00
Sleep continuity
Total sleep time (min)	−.31	.02	−.07	.15	−.00	−.28	.01
Sleep onset latency (min)	−.08	−.29	−.18	.82*	−.04	−.27	−.21
Wake after sleep onset (min)	.50*	.19	.26	−.81*	−.02	.66*	.03
Number of awakenings	.44*	.19	.37+	−.85*	−.08	.87**	−.19
Sleep efficiency (%)	−.49	−.17	−.25	.74*	.05	−.64*	−.05
Sleep architecture
NREM sleep
Stage 1 (%)	−.14	.21	−.07	−.71*	−.08	.42	.11
Stage 2 (%)	−.27	.11	−.12	.19	−.17	−.21	.04
Stage 3 (%)	.22	.00	.04	.02	.41	.13	−.22
Stage 4 (%)	.21	−.15	.03	−.08	.33	.45	−.60*
SWS (%)	.26	−.07	.05	−.03	.45+	.33	−.46
REM (%)	.14	−.17	.16	.11	−.33	−.35	.52+

Abbreviations: BDI = Beck depression inventory II, NREM = non-rapid-eye-movement, PCS = physical component summary, PSG = polysomnographic, REM = rapid-eye-movement, SF-36 = short form (36) health survey, SWS = slow wave sleep.

Numbers are standardized betas.

⁺p<.10,

^*p<.05,

^**p<.01