Table 7.

Multivariate logistic regression for study variables impacting postoperative daytime serum melatonin

Variable	Coefficient	p	R Square	F	P
Estrogen receptors	0.26	0.8	0.3	3.4	0.008
Progesterone receptors	0.21	0.11
Her/neu receptors	0.019	0.15
Depression severity	0.14	0.9
Insomnia	−0.1	0.4
Sleepiness	−0.1	0.4
Chronotype	0.48	0.004

Note: Bold value indicate statistical significance.