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Body Mass Index, Adverse Pregnancy Outcomes, and Cardiovascular Disease Risk.

Sadiya S Khan1, Lucia C Petito1, Xiaoning Huang1

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This summary is machine-generated.

Adverse pregnancy outcomes (APOs) are markers, not primary causes, of postpartum cardiovascular disease (CVD) risk in obese individuals. Obesity increases postpartum CVD risk, but APOs mediate only a small portion of this association.

Keywords:
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Area of Science:

  • Reproductive Health
  • Cardiovascular Health
  • Obesity Medicine

Background:

  • Obesity is a known risk factor for adverse pregnancy outcomes (APOs) and cardiovascular disease (CVD).
  • The role of APOs as mediators versus markers in the obesity-CVD relationship remains unclear.
  • This study investigates the link between body mass index, APOs, and postpartum CVD risk factors.

Purpose of the Study:

  • To examine the association between early pregnancy body mass index (BMI) and postpartum CVD risk factors.
  • To determine if APOs mediate the relationship between obesity and postpartum CVD risk.
  • To assess the proportion of the obesity-CVD risk association mediated by specific APOs.

Main Methods:

  • Utilized data from the nuMoM2b Heart Health Study, including first-trimester participants.
  • Adjudicated APOs (hypertensive disorders of pregnancy, preterm birth, small-for-gestational-age birth, gestational diabetes).
  • Employed mediation analyses to assess the role of APOs in the association between early pregnancy BMI and postpartum CVD risk factors (hypertension, hyperlipidemia, diabetes).

Main Results:

  • Early pregnancy obesity was significantly associated with higher incidence of postpartum hypertension, hyperlipidemia, and diabetes.
  • APOs were associated with increased postpartum hypertension and hyperlipidemia.
  • Hypertensive disorders of pregnancy mediated only a small proportion (13%) of the association between obesity and incident hypertension; no significant mediation by other APOs was observed.

Conclusions:

  • APOs appear to be markers of prepregnancy CVD risk rather than predominant causes of postpartum CVD risk.
  • The mediation effect of APOs on the association between obesity and postpartum CVD risk is limited.
  • Findings highlight the complex interplay between obesity, pregnancy, and long-term cardiovascular health.