Table 4.

Association between maternal supine sleep position and breathing in pregnant women.

	Minimum Oxygen Saturation
Maternal Parameters	Model 1: Unadjusted			Model 2: Adjusted
	Regression Coefficient	SE	P	Regression Coefficient	SE	P
Supine position	−0.02	0.01	.01	−0.02	0.01	.02
BMI at enrollment	−0.22	0.05	<.01	−0.22	0.05	<.01
Current smoking	−1.35	0.9	.16	−1.60	0.9	.08

BMI = body mass index.