Birth weight and subsequent body mass index in children: an international cross-sectional study. Mitchell, E., A., Stewart, A., W., Braithwaite, I., Hancox, R., J., Murphy, R., Wall, C., & Beasley, R. Pediatric Obesity, 12(4):280-285, 2017.
Birth weight and subsequent body mass index in children: an international cross-sectional study [pdf]Paper  abstract   bibtex   
Background: The reported association between birth weight and subsequent body mass index (BMI) is conflicting. Objectives: To examine the relationship between birth weight and BMI in children aged 6-7 years. Methods: Secondary analysis of data from a multi-centre, multi-country, cross-sectional study (International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three). Parents/guardians of children aged 6-7 years completed questionnaires about their children's birth weight, current height and weight and whether their mother smoked in the first year of the child's life. A general linear mixed model was used to determine the association between BMI and birth weight. Results: A total of 72 111 children (17 countries) were included in the analysis. There was a positive association of birth weight with BMI (for each kg increase in birth weight the BMI at 6-7 increased by 0.47 (SE 0.02) kg/m2; p < 0.0001) with a clear gradient by birth weight category. There was no statistically significant interaction between birth weight and Gross National Income (GNI). Conclusions: There is a positive linear relationship between birth weight and BMI in 6-7 year old children, which is present in both high and low income countries. Copyright © 2016 World Obesity Federation

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