Table 2.

Hazard ratios for heart failure^* by pregnancy complications in the first birth.

Complications in the first birth	Number of women	Number of events / women-years at risk	Age-adjusted models†	Fully adjusted models‡
			Hazard ratio (95% confidence interval)	Hazard ratio (95% confidence interval)
By hypertensive disorder of pregnancy status only
No HDP	475,269	499 / 5,883,782	Reference	Reference
HDP§	33,153	66 / 399,858	1.92 (1.49–2.48)**	1.83 (1.41–2.36)**
Gestational hypertension	8,827	15 / 114,919	1.38 (0.82–2.30)	1.41 (0.84–2.35)
Preeclampsia	24,326	51 / 284,939	2.17 (1.63–2.90)**	2.00 (1.50–2.68)**
By hypertensive disorder of pregnancy, small-for-gestational age delivery, and preterm delivery status
No HDP	475,269	499 / 5,883,782	Reference	Reference
HDP alone§	22,585	42 / 273,255	1.78 (1.30–2.44)**	1.72 (1.26–2.36)#
HDP with preterm and/or SGA delivery§	10,568	24 / 126,603	2.22 (1.48–3.35)**	2.04 (1.35–3.08)#
Gestational hypertension alone	6,948	10 / 89,863	1.19 (0.63–2.22)	1.21 (0.65–2.27)
Gestational hypertension with SGA and/or preterm birth	1,879	5 / 25,056	2.02 (0.84–4.88)	2.06 (0.85–4.98)
Preeclampsia alone	15,637	32 / 183,393	2.11 (1.48–3.02)**	1.99 (1.39–2.84)**
Preeclampsia with SGA and/or preterm birth	8,689	19 / 101,547	2.28 (1.44–3.61)**	2.04 (1.28–3.23)#

^*Heart failure endpoint is a composite of heart-failure related hospitalization and heart failure-related death

^†Age-adjusted models are adjusted only for maternal age at the last birth

^‡Fully adjusted models are adjusted for maternal birth year, maternal age at first birth, maternal age at last birth, chronic diabetes diagnosis prior to last birth, and final party

^§HDP includes both gestational hypertension and preeclampsia

^||P<0.05,

^#P<0.01,

^**P<0.001