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A potential role for allostatic load in preeclampsia

Vanessa J Hux1, James M Roberts

  • 1Vanderbilt University School of Medicine, Nashville, TN, USA, vanessa.hux@osumc.edu.

Maternal and Child Health Journal
|June 19, 2014
PubMed

Insights

Early pregnancy allostatic load (AL), a measure of physiologic risk and chronic stress, is linked to higher preeclampsia risk. Higher AL scores significantly increase the odds of developing preeclampsia.

Area of Science:

  • Reproductive Medicine
  • Cardiovascular Health
  • Stress Physiology

Background:

  • Preeclampsia is a serious pregnancy disorder with unknown causes, leading to maternal/fetal complications and future cardiovascular disease.
  • Existing risk factors like obesity are known, but early pregnancy markers for preeclampsia remain crucial for prediction.
  • Allostatic load (AL) quantifies cumulative physiologic wear and tear from chronic stress, offering a potential predictive measure.

Purpose of the Study:

  • To investigate the association between allostatic load (AL) measured early in pregnancy and the subsequent development of preeclampsia.
  • To determine if pregnancy-specific AL is a stronger predictor of preeclampsia than obesity.

Main Methods:

  • A case-control study matched 38 preeclamptic cases with 75 controls (<15 weeks gestation).
  • Allostatic load (AL) was calculated using 9 cardiovascular, metabolic, and inflammatory markers.
  • Conditional logistic regression and Akaike Information Criterion (AIC) were used for statistical comparison.

Main Results:

  • Women who developed preeclampsia had significantly higher early pregnancy AL scores (1.25 ± 0.68 vs. 0.83 ± 0.62, p = 0.002).
  • Higher AL was associated with increased odds of preeclampsia (OR 2.91, 95% CI 1.50-5.65).
  • The AL model demonstrated a better fit for predicting preeclampsia compared to obesity (AIC difference >2).

Conclusions:

  • Elevated allostatic load (AL) in early pregnancy is a significant predictor of increased preeclampsia risk.
  • AL may reflect the impact of maternal systemic function and chronic stress on preeclampsia development.
  • This study highlights AL as a promising early marker for identifying women at risk of preeclampsia.

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