Table 3.

Multivariable analysis: predictors of breastfeeding initiation (logistic regression) and lactation score (linear regression)

Variable	Initiation of Breastfeeding (n = 450)		Lactation score (n = 274)
	Adjusted odds ratio	Confidence interval	Effect size	P-value
Age (years)	1.01	(0.96, 1.06)	0.02	0.83
Racea
Black	0.81	(0.46, 1.42)	−3.13	0.006
Educationb
College degree	1.27	(0.72, 2.23)	1.20	0.31
Postgraduate degree	2.77	(1.26, 6.08)	2.11	0.12
Marital statusc
Married	1.38	(0.78, 2.45)	−1.01	0.44
Plan to work outside home (at 6 mo pp)d
Parttime	0.69	(0.31, 1.54)	−1.49	0.30
Fulltime	0.60	(0.33, 1.21)	−4.26	0.0005
Parity	1.30	(0.94, 1.81)	1.85	0.006
Current smokinge
Yes	0.45	(0.18, 1.14)	−7.06	0.008
Postpartum depressiong
Yes	0.77	(0.36, 1.67)	−1.44	0.42
Delivery typef
Cesarean section	0.78	(0.48, 1.25)	−0.69	0.47
Gestational age (weeks)	1.12	(1.01, 1.25)	0.65	0.002
Gestational weight gain (kg)	1.01	(0.97, 1.02)	−0.0004	0.99
Body mass index (kg/m2)	0.96	(0.92, 0.99)	−0.22	0.01
Intervention arm			0.14	0.87
Intercept (R-square)			16.7	(0.24)

Significant P-values in bold

^aReference categories: all other races;

^bhigh school graduate or less;

^csingle;

^ddo not plan to work outside the home;

^enonsmoker;

^fvaginal delivery;

^gnot depressed