Maternal smoking during pregnancy in relation to child overweight: follow-up to age 8 years

Aimin Chen1, Michael L Pennell, Mark A Klebanoff

  • 1Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA. chen17@niehs.nih.gov

Insights

Maternal smoking during pregnancy is linked to an increased risk of childhood overweight. This association is detectable before age 8, impacting children

Area of Science:

  • Pediatric Health
  • Public Health
  • Reproductive Health

Background:

  • Existing research suggests a link between maternal smoking during pregnancy and offspring overweight.
  • The magnitude and age of onset for this association remain unclear.

Purpose of the Study:

  • To investigate the relationship between maternal smoking during pregnancy and offspring weight, height, and body mass index (BMI).
  • To determine the age at which this association becomes detectable.

Main Methods:

  • Analysis of prospective data from 34,866 children in the US Collaborative Perinatal Project.
  • Examination of maternal pregnancy smoking in relation to offspring anthropometric measurements at ages 1, 3, 4, 7, and 8 years.

Main Results:

  • Offspring of smokers exhibited lower birth weight, followed by rapid weight gain.
  • Children of smokers showed consistently decreased height and an increased risk of overweight, particularly girls.
  • At age 7, the odds of being in the 85th percentile for BMI were higher in children of mothers who smoked heavily during pregnancy.

Conclusions:

  • Maternal smoking during pregnancy is associated with a modest increase in the risk of childhood overweight.
  • This increased risk is evident before the age of 8 years.
Abstract

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