Pregnancy-related factors may signal additional protection or risk of future cardiovascular diseases

BMC Women's Health

Table 4 Survival analysis for breastfeeding as a predictor of cardiovascular death and surrogate outcomes for women with pregnancy history in the National Health and Nutrition Examination Survey, 1999–2006

	CVD Death				CVD deaths + surrogate CVD
	Unadjusted		Adjusted		Unadjusted		Adjusted
	HR (95% CI)	p value	HR (95% CI)	p value	HR (95% CI)	p value	HR (95% CI)	p value
Cause-specific survival model	0.75 (0.44–1.27)	0.28	0.76 (0.45─1.27)	0.30	0.72 (0.48–1.06)	0.10	0.77 (0.52─1.14)	0.19
Competing risks survival model	0.76 (0.45–1.30)	0.32	0.79 (0.48─1.33)	0.38	0.77 (0.52–1.12)	0.17	0.77 (0.52─1.14)	0.20

Cause-specific models were censored at the time of death of non-CVD or end of follow-up period. Competing risks models were censored at the end of follow-up period regardless of non-CVD death. Models were adjusted for marital status, education level, body mass index, parity, age at first birth, weekly hours of physical activity, Healthy Eating Index 2015, and Pooled Cohort Equation 10-year estimated CVD risk
CI, confidence interval; CVD, cardiovascular disease; HR, hazard ratios

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