Developmental origins of childhood overweight: potential public health impact

Area of Science:

• Pediatrics
• Public Health
• Epidemiology

Background:

• Childhood overweight is a significant public health concern with known modifiable risk factors.
• Previous research has examined individual risk factors, but not their combined impact on childhood overweight.
• Understanding the synergistic effects of pre- and postnatal determinants is crucial for effective prevention strategies.

Purpose of the Study:

• To investigate the combined influence of maternal smoking during pregnancy, gestational weight gain, breastfeeding duration, and infant sleep duration on the risk of childhood overweight at age 3.
• To quantify the probability of overweight based on different combinations of these four modifiable risk factors.

Main Methods:

• Prospective cohort study (Project Viva) of 1,110 mother-child pairs.
• Logistic regression models were used to assess the association between four modifiable risk factors and child overweight (BMI for age and sex ≥95th percentile) at age 3.
• Covariates included maternal BMI, maternal education, child race/ethnicity, and household income.

Main Results:

• The probability of a child being overweight at age 3 ranged from 6% with favorable levels of all four factors to 29% with adverse levels.
• Maternal smoking during pregnancy affected 9.8% of mothers, and 50% experienced excessive gestational weight gain.
• In infancy, 73% of pairs breastfed for less than 12 months, and 31% of infants slept less than 12 hours daily.

Conclusions:

• Favorable levels of maternal smoking, gestational weight gain, breastfeeding duration, and infant sleep duration are associated with a substantially lower risk of childhood overweight.
• Interventions targeting these combined behaviors during pregnancy and infancy hold significant potential for preventing childhood overweight.
• A multi-faceted approach addressing these modifiable factors is recommended for early childhood obesity prevention.