TABLE 4.

Numbers of nonelective reasons for pumping and survival of HM-feeding durations for mothers in the imputed data set¹

Comparison, nonelective reasons for pumping compared with 0,2 n	Adjustment	HR (95% CI)	P
1
Feeding any HM	Adjusted3	1.12 (1.05, 1.21)	0.001
FAB	Adjusted4	2.07 (1.77, 2.42)	<0.0001
Feeding exclusive HM	Adjusted5	1.14 (1.09, 1.20)	<0.0001
2
Feeding any HM	Adjusted3	1.18 (1.01, 1.27)	<0.0001
FAB	Adjusted4	2.13 (1.80, 2.52)	<0.0001
Feeding exclusive HM	Adjusted5	1.23 (1.16, 1.30)	<0.0001
3–5
Feeding any HM	Adjusted3	1.36 (1.25, 1.49)	<0.0001
FAB	Adjusted4	3.34 (2.86, 4.04)	<0.0001
Feeding exclusive HM	Adjusted5	1.55 (1.45, 1.65)	<0.0001

¹FAB, feeding at the breast; HM, human milk.

²In all models, survival analyses were used to compare the survival HM feeding, FAB, and feeding HM exclusively between the frequency group of interest and the comparison group.

³Full models were adjusted for mothers’ age, marital status (married, widowed, divorced, separated, or never married), the level of education achieved (high school or less, some college, or college or greater), and the level of satisfaction with their most-used pump (high compared with low-to-medium).

⁴Full models were adjusted for mothers’ age, the level of education achieved (high school or less, some college, or college or greater), the level of satisfaction with their most-used pump (high compared with low-to-medium), and whether their most-used pump was used or new when they obtained it.

⁵Full models were adjusted for mothers race/ethnicity (white, black, Asian/Pacific Islander, Hispanic, or other), BMI category (normal weight, overweight, or obese), hours worked per week on return to work (0, 1–19, 20–34, or ≥35), timing of first pumping episode, whether mothers’ most-used pumps were new or used, and mothers’ level of satisfaction with their most-used pump (high compared with low-to-medium).