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Being born too small, too early, or both: does it matter for risk of hypertension in the elderly?

Anna-Karin E Bonamy1, M Norman, M Kaijser

  • 1Department of Woman and Child Health, Karolinska Institutet, Stockholm, Sweden. anna-karin.edstedt.bonamy@ki.se

American Journal of Hypertension
|August 16, 2008
PubMed

Insights

Low birth weight increases hypertension risk due to poor fetal growth, not preterm birth. This finding highlights fetal growth as a key factor in adult high blood pressure development.

Area of Science:

  • Epidemiology
  • Public Health
  • Cardiovascular Research

Background:

  • Low birth weight is a known risk factor for developing high blood pressure later in life.
  • The specific contributions of preterm birth versus poor fetal growth to this risk are not fully understood.

Purpose of the Study:

  • To investigate the independent effects of preterm birth and poor fetal growth on the risk of adult hypertension.
  • To differentiate the impact of gestational duration and fetal growth on long-term hypertension risk.

Main Methods:

  • Analysis of 250,000 Swedish birth records (1925-1949).
  • Inclusion of subjects born preterm (<35 weeks gestation) and/or with low birth weight (≤2,000g girls, ≤2,100g boys), plus controls.
  • Hypertension diagnosis data sourced from the Swedish Hospital Discharge Register (1987-2006).

Main Results:

  • A negative association was observed between birth weight and hypertension risk (P=0.0005).
  • Poor fetal growth (small for gestational age) significantly increased hypertension risk by 54%.
  • No significant association was found between gestational duration (preterm birth) and hypertension risk.

Conclusions:

  • For individuals born in the early 20th century, poor fetal growth, not preterm birth, is the primary driver of the association between low birth weight and adult hypertension.
  • This suggests fetal growth restriction is a critical determinant of future cardiovascular health.
Abstract

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