Table 6.

Results from adjusted linear regression models quantifying the association between breastfeeding duration (< 2 weeks vs. ≥ 2 weeks) and blood pressure measured at the postpartum clinic visit.

	Active (N = 408)		Control (N = 394)		All (N = 802)
	Regression coefficient (95% CI)	P	Regression coefficient (95% CI)	P	Regression coefficient (95% CI)	P
Model 1 a
Postpartum SBP	−2.72 (−5.92, 0.48)	0.09	−4.24 (−7.66, −0.82)	0.02	−3.52 (−5.85, −1.19)	0.003
Postpartum DBP	−3.10 (−5.43, −0.77)	0.009	−−0.99 (−3.50, 1.51)	0.43	−2.05 (−3.76, −0.35)	0.02
Model 2 b
Postpartum SBP	−1.59 (−5.11, 1.92)	0.37	−3.81 (−7.65, 0.03)	0.05	−2.71 (−5.29, −0.14)	0.04
Postpartum DBP	−2.03 (−4.59, 0.53)	0.12	−0.66 (−3.48, 2.16)	0.64	−1.39 (−3.27, 0.50)	0.15
Model 3 c
Postpartum SBP	−1.52 (−5.02, 1.98)	0.40	−3.00 (−6.83, 0.83)	0.12	−2.36 (−4.92, 0.19)	0.07
Postpartum DBP	−2.12 (−4.66, 0.41)	0.10	−0.03 (−2.85, 2.79)	0.98	−1.10 (−2.97, 0.76)	0.24

CI, confidence interval; SBP, systolic blood pressure; DBP, diastolic blood pressure.

All models compare breastfeeding duration (dichotomized as < 2 weeks breastfeeding vs. ≥ 2 weeks) as a predictor for blood pressure measurements at the postpartum visit.

^aAdjusted for delivery blood pressure.

^bAdjusted for delivery blood pressure, mother’s insurance, body mass index, pre-existing diabetes, maternal education, marital status.

^cAdjusted for delivery blood pressure, mother’s insurance, body mass index, pre-existing diabetes, maternal education, marital status, race/ethnicity, and smoking.