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Associations of childcare type, age at start, and intensity with body mass index trajectories from 10 to 42 years of age in the 1970 British Cohort Study

Pediatric Obesity May 10, 2020

Costa S, Bann D, Benjamin‐Neelon SE, et al. - Utilizing data from a large UK birth cohort study, researchers explored the correlations of childcare type, age at start, and intensity with body mass index (BMI) trajectories from ages 10 to 42 years. Also, a combined age at start and intensity exposure was investigated. The sample consisted of 8,234 people in the 1970 British Cohort Study, who had data on childcare attendance (no, yes), type (formal, informal), age at start (4‐5, 3‐3.99, 0‐2.99 years old), and intensity (1, 2, 3, 4‐5 days/week) reported at age 5 years and 32,563 BMI observations. Among participants attending childcare 1 to 2 days a week, those beginning at the age of 3 to 3.99 years had a BMI of 0.197 kg/m2 higher at the age of 10 years than those starting at theage of 4 to 5 years and those starting at the age of 0 to 2.99 years had a BMI of 0.289 kg/m2 higher. A similar dose‐response pattern for intensity was found when holding age at start constant. Findings suggested that children who begin childcare earlier and/or attend more often may be at higher risk of obesity over the long term.

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