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Debate about the relative roles of genetics and environment in the genesis of childhood obesity continues. To examine the possible effect of maternal health lifestyle on childhood obesity risk, researchers prospectively assessed obesity in nearly 1300 nonobese children (ages 9–14 years) of participants in the Nurses' Health Study II. Maternal lifestyle factors deemed low-risk were normal body-mass index (BMI), healthy diet, regular exercise, no current smoking, and low-to-moderate alcohol intake. Findings were as follows:
Five percent of the cohort became obese during a median follow-up of 5 years.
Children of mothers with a BMI ≥30 had a threefold higher risk for becoming obese compared with children of mothers with a BMI <25.
Children of for…