Associations Between Mothers' and Their Children's Weights at 4 Years of Age

Area of Science:

• Pediatrics
• Public Health
• Obstetrics

Background:

• Childhood obesity is a growing epidemic with significant long-term health consequences.
• Maternal factors during pregnancy are increasingly recognized as crucial determinants of offspring's long-term health outcomes.
• Understanding the interplay of maternal weight and infant characteristics is vital for developing effective prevention strategies.

Purpose of the Study:

• To investigate the association between maternal pre-pregnancy body mass index (BMI) and gestational weight gain with offspring overweight and obesity at age 4.
• To identify key maternal weight characteristics that serve as predictors for childhood obesity.
• To explore potential interactions between maternal BMI and infant birth weight in relation to childhood obesity risk.

Main Methods:

• Utilized data from 321 mother/child pairs from a postpartum weight retention cohort study.
• Employed chi-square and logistic regression analyses to assess predictor variables.
• Examined maternal pre-pregnancy BMI, net gestational weight gain, and infant birth weight as potential predictors.

Main Results:

• Maternal pre-pregnancy BMI and infant birth weight were significant positive predictors of offspring obesity at age 4.
• A significant interaction effect was observed: obese mothers with low birth weight infants (<3 kg) had a higher proportion of obese children.
• Net gestational weight gain was not directly associated with childhood obesity but correlated with infant birth weight in normal and overweight women.

Conclusions:

• Preconception BMI reduction in overweight/obese women is a critical strategy for preventing childhood obesity.
• Preventing excessive gestational weight gain is recommended for all pregnant women to mitigate offspring obesity risk.
• Targeting maternal weight status before and during pregnancy is essential for addressing the childhood obesity epidemic.