Table S2.

Results of univariate and bivariate analysis of NREM log beta EEG power relations to potential covariates

	Univariate	Multivariate
	P value	Covariate P value	Status P value
Hot flash frequency	0.0081	0.12	0.030
Overall health	0.028	0.043	0.0033
SSRI use	0.039	0.050	0.0025
BMI	0.045	0.053	0.0029
BP meds in past 2 wks	0.072	0.14	0.0034
Caffeinated drinks per day	0.095	0.20	0.0086
Upset by workload	0.10	0.21	0.0089
Race/ethnicity-site	0.13	0.12	0.0018
How hard to provide basics	0.14	0.12	0.0013
Quality of life	0.16	0.15	0.0019
Body pain	0.18	0.052	0.0023
Social support	0.18	0.14	0.0016
Nap duration	0.19	0.30	0.0049
IDS	0.35	0.48	0.0029
Log AHI	0.70	0.71	0.0026
Age	0.85	0.38	0.0021

Univariate analysis examined the relation of beta to each covariate alone. Bivariate analysis examined the relation of beta to menopausal status with each covariate controlled and to each covariate with menopausal status controlled. Comparing “Status P” to the one-way ANOVA status P-value of 0.0020 for NREM shows that the only measureable change in these P-values came from adding “hot flash frequency.”