Table 2.

Association Between Single Highest Ever Duration of Breastfeeding Reported Across All Live Births (HIGH-EVER) and Coronary Artery Disease Status Using Logistic Regression, Before and After Covariate Adjustment and Multiple Imputation of Missing Covariates

	UnadjustedOR (95% CI)	pb	Complete caseOR (95% CI)a	pb	Multiple imputationOR (95% CI)a	pb
Maximum duration of breastfeedingc
Ref: never child/pregnant
1+ child; never breastfed	2.32 (1.18–4.57)	0.01	1.79 (0.81–3.94)	0.06	1.75 (0.82–3.71)	0.04
1–4 months	2.51 (1.43–4.42)		2.78 (1.43–5.39)		2.62 (1.4–4.91)
5–9 months	1.1 (0.58–2.06)		1.04 (0.5–2.15)		1.02 (0.51–2.02)
10–18 months	1.14 (0.64–2.02)		1.22 (0.63–2.37)		1.3 (0.69–2.44)
19+ months	1.64 (0.81–3.33)		1.72 (0.69–4.26)		2.04 (0.93–4.5)
Maximum duration of breastfeedingd
Ref: child +, never breastfed
1–4 months	1.08 (0.51–2.3)	0.06	1.57 (0.63–3.92)	0.14	1.5 (0.62–3.59)	0.12
5–9 months	0.47 (0.21–1.06)		0.53 (0.2–1.39)		0.52 (0.21–1.29)
10–18 months	0.49 (0.23–1.05)		0.71 (0.29–1.76)		0.77 (0.32–1.84)
19+ months	0.71 (0.3–1.68)		0.89 (0.29–2.76)		1.12 (0.41–3.07)
Maximum duration of breastfeedinge
Ref: 1–4 months
5–9 months	0.44 (0.21–0.89)	0.06	0.33 (0.14–0.8)	0.09	0.34 (0.15–0.79)	0.07
10–18 months	0.45 (0.23–0.88)		0.47 (0.21–1.06)		0.53 (0.25–1.14)
19+ months	0.65 (0.3–1.43)		0.57 (0.2–1.65)		0.76 (0.31–1.9)

^aAdjusted for age, race, BMI, tobacco use, hypertension, systolic BP, hyperlipidemia, total cholesterol, HDL, triglycerides, and diabetes.

^bWald chi-square test for breastfeeding variable.

^cIn complete case models, 65 of 643 observations deleted because of missing data.

^dIn complete case models, 41 of 382 observations deleted because of missing data.

^eIn complete case models, 37 of 332 observations deleted because of missing data.