Pre-Term Delivery increases future risks of cardiometabolic
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Women who deliver pre-term have been reported to have increased future risks of cardiometabolic disorders. However, their long-term risks of ischemic heart disease (IHD) and whether such risks are due to shared familial factors are unclear. A better understanding of these risks may help improve long-term clinical follow-up and interventions to prevent IHD in women.

The purpose of this study was to determine the long-term risks of IHD in women by pregnancy duration. The study was conducted of all 2,189,190 women with a singleton delivery who were followed up for IHD. In 47.5 million person-years of follow-up, 49,955 (2.3%) women were diagnosed with IHD. In the 10 years following delivery, the aHR for IHD associated with pre-term delivery was 2.47, and further stratified was 4.04 for extremely pre-term, 2.62 for very pre-term (28 to 33 weeks), 2.30 for late pre-term (34 to 36 weeks), and 1.47 for early-term (37 to 38 weeks), compared with full-term (39 to 41 weeks). These risks declined but remained significantly elevated after additional follow-up.

These findings did not appear attributable to shared genetic or environmental factors within families. Additional pre-term deliveries were associated with further increases in risk. In this large national cohort, pre-term delivery was a strong independent risk factor for IHD. This association waned over time but remained substantially elevated up to 40 years later. Pre-term delivery should be recognized as a risk factor for IHD in women across the life course.

Source: https://www.onlinejacc.org/content/76/1/57/F2
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