Association of prenatal medical risk with breastfeeding outcomes up to 12 months in the All Our Families community-based birth cohort

Table 4 Association between prenatal medical risk and breastfeeding duration

	Breastfeeding to 4 months			Breastfeeding to 12 months			Time to Breastfeeding Cessation
	M1 OR (95% CI)	M2 OR (95% CI)	M3 OR (95% CI)	M1 OR (95% CI)	M2 OR (95% CI)	M3 OR (95% CI)	M1 HR (95% CI)	M2 HR (95% CI)	M3 HR (95% CI)
Risk score	0.93 (0.89, 0.97)	0.92 (0.88, 0.96)	0.94 (0.90, 0.99)	0.92 (0.87, 0.96)	0.90 (0.86, 0.95)	0.93 (0.87, 0.98)	1.06 (1.03, 1.09)	1.06 (1.04, 1.09)	1.05 (1.02, 1.08)
Risk category
High	0.76 (0.62, 0.92)	0.74 (0.60, 0.90)	0.83 (0.67, 1.04)	0.75 (0.60, 0.93)	0.72 (0.57, 0.90)	0.80 (0.63, 1.02)	1.23 (1.09, 1.39)	1.26 (1.11, 1.42)	1.16 (1.02, 1.33)
Risk type
Pre-pregnancy	0.60 (0.47, 0.77)	0.60 (0.47, 0.77)	0.63 (0.49, 0.80)	0.70 (0.53, 0.93)	0.71 (0.53, 0.94)	0.74 (0.56, 0.99)	1.34 (1.15, 1.55)	1.33 (1.15, 1.54)	1.31 (1.13, 1.52)
Past obstetric	1.10 (0.86, 1.41)	0.97 (0.73, 1.27)	1.19 (0.88, 1.61)	0.90 (0.69, 1.16)	0.76 (0.57, 1.01)	0.87 (0.64, 1.18)	1.07 (0.93, 1.23)	1.17 (1.01, 1.37)	1.06 (0.89, 1.25)
Current obstetric	0.72 (0.59, 0.88)	0.74 (0.61, 0.91)	0.74 (0.59, 0.93)	0.67 (0.54, 0.84)	0.68 (0.54, 0.86)	0.67 (0.52, 0.87)	1.29 (1.14, 1.45)	1.27 (1.13, 1.44)	1.28 (1.12, 1.46)
Substance use	0.42 (0.29, 0.60)	0.47 (0.32, 0.68)	0.47 (0.32, 0.68)	0.36 (0.20, 0.63)	0.36 (0.20, 0.64)	0.36 (0.20, 0.64)	1.91 (1.53, 2.38)	1.83 (1.46, 2.30)	1.82 (1.45, 2.29)

M1 = model 1, crude. M2 = model 2, adjusted for sociodemographic vulnerability and parity. M3 = model 3, adjusted for sociodemographic vulnerability, parity, mode of delivery, and gestational age. All covariates were binary, except gestational age which was continuous
Risk scores represent each woman’s integer score on the Antepartum Risk Score tool (comprised of 46 weighted risk factors), and corresponds to the severity of prenatal medical risk
Time to breastfeeding cessation represents the amount of time, in weeks, between birth and self-report of stopping any breastfeeding (exclusively or in combination with other food sources)
Hosmer and Lemeshow tests performed on all M3 logistic regression models were P > 0.05, indicating satisfactory model fit

ISSN: 1746-4358