EPIDEMIOLOGY OF BMI REBOUND

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This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The purpose of this study is to precisely determine the age of children at Body Mass Index (BMI) rebound and evaluate potential correlates of the timing of BMI rebound in a cohort of children beginning at age 3 years. Better understanding of the epidemiology of BMI rebound could lead to improved identification of children at high risk of future obesity prior to excess weight gain. Elucidation of the determinants of the timing of BMI rebound could lead to the development of strategies to prevent the development of obesity. A major objective is to evaluate the relationship of changes in BMI with changes in body composition using dual energy x-ray absorptiometry (DXA). We will examine the association of the timing of BMI rebound and the percent body fat at the time of BMI rebound with gender, ethnic group, and socioeconomic status. We will evaluate the potential determinants of the timing of BMI rebound including diet, physical activity, and parental body mass index. We will examine the relationship of the timing of BMI rebound to percent body fat, distribution of body fat, blood pressure, plasma lipid and lipoprotein concentrations, fasting insulin, glucose and leptin levels and left ventricular mass at age 7 years.