Race/Ethnicity-Specific Associations of Urinary Phthalates with Childhood Body Mass in a Nationally Representative Sample

EHP: February 4, 2013

Background: Phthalates have antiandrogenic effects and may disrupt lipid and carbohydrate metabolism. Racial/ethnic subpopulations have been documented to have varying urinary phthalate concentrations and prevalences of childhood obesity.

Objective: We examined associations between urinary phthalate metabolites and body mass outcomes in a nationally representative sample of US children and adolescents.

Methods: We performed stratified and whole-sample cross-sectional analyses of 2,884 children 6-19 years of age who participated in the 2003-2008 National Health and Nutrition Examination Survey. Multivariable linear and logistic analyses of body mass index Z-score, overweight, and obesity were performed against molar concentrations of low-molecular weight (LMW), high-molecular weight (HMW) and di-2-ethylhexylphthalate (DEHP) metabolites, controlling for gender, television watching, caregiver education, caloric intake, poverty-income ratio, race/ethnicity, serum cotinine, and age group. Sensitivity analysis examined robustness of results to removing sample weighting, normalizing phthalate concentrations for molecular weight and examination of different dietary intake covariates. Read More