Table 1.

Comparisons by menopausal status of polysomnography measures and log power in all night NREM and REM EEG. Averages and one-way ANOVA results.

	Average			ANOVA Results
	Pre and Early (n = 189)	Late Peri (n = 73)	Post (n = 59)	F2,318	P value
Stage 1 (%)	7.0	7.6	7.4	0.34	0.71
Stage 2 (%)	64.5	63.5	66.0	1.77	0.17
Slow wave sleep (%)	3.6	3.9	2.8	1.12	0.33
Stage REM (%)	24.9	25.1	23.8	1.11	0.33
Total sleep time (min)	386	380	388	0.34	0.71
Log NREM delta power (μV2)	2.18	2.20	2.22	1.14	0.32
Log REM delta power (μV2)	1.57	1.61	1.59	1.32	0.27
Log NREM beta power (μV2)	0.483a	0.555b	0.551b	6.34	0.0020
Log REM beta power (μV2)	0.532a	0.632b	0.633b	8.27	0.0003

^a,bMeans sharing a common superscript (or lacking a superscript) do not differ significantly at α < 0.05 (Tukey multiple comparison).