Multilevel analysis of BMI growth trajectories of US school children: Features and risk factors

SSM - Population Health
Maria Stack Hankey, Yasuo Miyazaki

Abstract

Childhood obesity continues to be a major focus of public health efforts in the United States, where nearly 17% of children are obese. In this study, we focused on two significant features that characterize U.S. society-school mobility and a single-parent family structure-and how they relate to childhood obesity/overweight. Using a nationally representative sample from the Early Childhood Longitudinal Study-Kindergarten (ECLS-K) class of 1998, we examined the body mass index (BMI) growth trajectories of children to determine how these two key features interacted with demographic characteristics of gender, race/ethnicity, and socio-economic status (SES), which are known to be associated with BMI. We analyzed five waves of data from kindergarten through fifth grade of 9041 students applying a two-level hierarchical linear model (HLM). Results indicated that children who changed schools more than two times from kindergarten to fifth grade had higher BMI growth trajectories compared to children who changed only once or did not change schools. To our knowledge, no prior studies have examined this association. Results also indicated children in single-parent families were more likely to have higher BMI growth trajectories compared to...Continue Reading

Software Mentioned

HLM7
ECLS

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