Table 2.

Polysomnographic variables.

	Women no OSA	Women OSA	p-value		Men no OSA	Men OSA	p-value		Sex × LnAHI interaction p value
			Unadj.	Adj.*			Unadj.	Adj.*
Sleep period time (SPT, min)	465 (453–477)	468 (447–477)	0.587	0.749	490 (453–502)	471 (437–498)	0.721	0.994	0.979
Total sleep time (TST, min)	445 (427–460)	433 (399–455)	0.053	0.403	454 (410–491)	433 (404–470)	0.200	0.677	0.638
Sleep efficiency (%)	92 (87–97)	86 (84–93)	0.041	0.159	94 (86–96)	88 (83–94)	0.123	0.968	0.764
Sleep latency (min)	15 (11–22)	17 (10–26)	0.692	0.550	14 (7–22)	14 (10–25)	0.445	0.193	0.165
N1 (min)	24 (20–33)	28 (17–38)	0.997	0.707	31 (11–33)	40 (22–51)	0.012	0.108	0.043
N2 (min)	257 ± 7	258 ± 8	0.939	0.269	278 ± 9	269 ± 8	0.505	0.244	0.813
N3 (min)	61 (28–82)	50 (24–65)	0.563	0.822	33 (7–82)	11 (2–37)	0.040	0.069	0.092
REM (min)	106 ± 5	90 ± 6	0.037	0.039	106 ± 9	101 ± 6	0.619	0.811	0.424
Wake after sleep onset (min)	18 (9–34)	34 (19–59)	0.023	0.252	11 (6–32)	26 (11–53)	0.103	0.548	0.383

Data are given as mean ± SEM for normally distributed continuous variables, and median (interquartile range) for non-normally distributed continuous variables. For non-normally distributed variables, the results of the statistical analysis reported were obtained after appropriate transformation to normality.

^*Adjusted for age, LnBMI and race/ethnicity.

Sleep period time: interval between sleep onset and final morning awakening. Total sleep time: sleep period time minus duration of wake after sleep onset. Sleep latency: time from lights off to sleep onset. Sleep efficiency: total sleep time as percentage of the time allocated to sleep (i.e., the interval between lights off and lights on); N1, NREM stage 1; N2, NREM stage 2; N3, slow-wave sleep; REM, rapid eye movement sleep. Bold values indicate statistically significant p-values. Italic values indicate trends for statistical significance of p-value