Central fat accretion and insulin sensitivity: differential relationships in parous and nulliparous women.

Academic Article

Abstract

  • BACKGROUND/OBJECTIVES: Childbearing is associated with a disproportionate accumulation of visceral fat and an increased risk of metabolic disease. However, it is unknown whether the visceral fat accretion associated with pregnancy modifies a woman's risk for metabolic disease. The purpose of this study was to test whether the association between abdominal fat and insulin sensitivity differs by parity status in healthy overweight women. SUBJECTS/METHODS: Intra-abdominal adipose tissue (IAAT) via CT, body composition by DXA, insulin sensitivity via intravenous glucose tolerance test and minimal model (SI), HOMA-IR, and cardiorespiratory fitness (VO2max) were assessed in 212 non-diabetic, premenopausal, overweight non-Hispanic white and African-American women. RESULTS: Nulliparous women (n=98) were younger, had less IAAT and higher VO2max, but similar SI, HOMA-IR and leg fat, compared to parous (n=114). In nulliparous women, IAAT was negatively associated with SI, controlling for age, race and body fat mass (r=-0.40, P<0.001), but this relationship was attenuated in parous women (r=-0.15, P=0.16). In multiple linear regression analysis, leg fat and IAAT were significant predictors of SI in nulliparous, but not parous women. CONCLUSIONS: Results suggest that greater IAAT in parous women does not lead to greater insulin resistance; rather, transient insulin resistance during pregnancy may encourage intra-abdominal fat accumulation that is metabolically benign. This underscores the need to consider parity when assessing cardiometabolic risk.
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    Keywords

  • Adiposity, Adult, Analysis of Variance, Body Composition, Body Fat Distribution, Body Mass Index, Cross-Sectional Studies, Female, Humans, Insulin, Insulin Resistance, Intra-Abdominal Fat, Leg, Parity, Pregnancy, Reproductive History
  • Digital Object Identifier (doi)

    Author List

  • Ingram KH; Hunter GR; James JF; Gower BA
  • Start Page

  • 1214
  • End Page

  • 1217
  • Volume

  • 41
  • Issue

  • 8