Table 3.

Associations of maternal anthropometrics with log-transformed breast milk C-Reactive Protein at one and three months postpartum^a

	Model 1b				Model 2c				Model 3d
Maternal Characteristics	N	β	SE	p-value	N	β	SE	p-value	N	β	SE	p-value
Pre-pregnancy body mass index, kg/m2	134	0.430	0.099	<0.001	132	0.488	0.105	<0.001	–	–	–	–
Gestational weight gain, kg	134	0.035	0.108	0.748	132	0.026	0.110	0.816	132	0.102	0.103	0.327
Exceeds gestational weight gain guidelinese	134	0.682	0.205	0.001	132	0.667	0.209	0.002	132	0.513	0.198	0.011
Postpartum weight loss at 1 and 3 months, kgf	133	−0.102	0.082	0.215	132	−0.117	0.082	0.157	132	−0.117	0.079	0.138

^aAll continuous independent variables (pre-pregnancy body mass index, gestational weight gain, and postpartum weight loss) were standardized to a mean of 0 and a standard deviation of 1. Bolded values are statistically significant (p<0.05).

^bModel 1 is the crude model.

^cModel 2 adjusts for maternal education and gestational age at delivery.

^dModel 3 adjusts for covariates in Model 2, as well as pre-pregnancy BMI.

^eCalculated using the 2009 Institute of Medicine gestational weight gain guidelines, based on pre-pregnancy BMI.

^fPostpartum weight loss was calculated as maternal weight at delivery minus maternal weight at one or three months postpartum, and was entered into the mixed effects models as a time-varying independent variable.