TABLE 3.

Predicting inability to fully breastfeed for 4 and 6 mo postpartum among the Norwegian women in the MoBa study¹

		4 mo postpartum, OR (95% CI)		6 mo postpartum, OR (95% CI)
Prepregnancy BMI and GWG group2	n	Crude model	Adjusted model3	Crude model	Adjusted model3
Normal
Within recommendations	12,958	1	1	1	1
Below recommendations	7056	1.10 (1.03, 1.16)	1.09 (1.02, 1.16)	1.02 (0.94,1.11)	1.02 (0.94, 1.10)
Above recommendations	12,589	1.22 (1.16, 1.29)	1.08 (1.02, 1.13)	1.25 (1.16, 1.34)	1.08 (1.01, 1.16)
Underweight
Within recommendations	654	1.35 (1.15, 1.58)	1.19 (1.01, 1.40)	1.13 (0.90, 1.41)	0.94 (0.75, 1.18)
Below recommendations	440	1.20 (0.99, 1.46)	1.12 (0.92, 1.37)	0.85 (0.67, 1.09)	0.78 (0.61, 1.00)
Above recommendations	359	1.61 (1.30, 1.98)	1.15 (0.92, 1.42)	1.87 (1.31, 2.69)	1.21 (0.84, 1.74)
Overweight
Within recommendations	2254	1.45 (1.32, 1.59)	1.42 (1.29, 1.56)	1.31 (1.14, 1.49)	1.29 (1.12, 1.47)
Below recommendations	954	1.52 (1.33, 1.74)	1.46 (1.28, 1.68)	1.18 (0.98, 1.43)	1.13 (0.93, 1.38)
Above recommendations	7516	1.61 (1.52, 1.70)	1.44 (1.36, 1.53)	1.53 (1.40, 1.67)	1.36 (1.24, 1.48)
Obese
Within recommendations	953	1.91 (1.67, 2.18)	1.67 (1.45, 1.91)	1.50 (1.22,1.84)	1.33 (1.08, 1.64)
Below recommendations	807	2.15 (1.87, 2.48)	1.97 (1.70, 2.28)	1.57 (1.25, 1.97)	1.48 (1.17, 1.86)
Above recommendations	2763	2.75 (2.53, 2.99)	2.27 (2.08, 2.48)	1.86 (1.62, 2.13)	1.50 (1.31, 1.73)

¹Among those who initiated breastfeeding, n = 49,309. GWG, gestational weight gain; MoBa, Norwegian Mother and Child Cohort Study.

²Prepregnant BMI was categorized as normal, underweight, overweight, or obese grades I–III according to WHO classifications, and GWG was expressed as within, below, or above the GWG recommended by the Institute of Medicine (11). The latter recommendation takes prepregnancy BMI into account.

³Adjusted for income, education, age, smoking, parity, diabetes, and cesarean delivery.