Amount of variation of lead, cadmium, mercury, and arsenic exposure explained by diet among children versus adults.

Abbreviations: DMA, dimethylarsinic acid; MMA, monomethylarsonic acid. a: base model covariates include age (continuous, years), sex, body mass index (continuous, for children Z-score and kg/m2 for adults), serum cotinine (continuous, µg/L), and age of home (built before 1978 versus after 1978). b: further adjusted for employment status (not working versus part- or full-time). c: dietary data includes the 49 foods and water variables as independent variables (10 g/day). d: further adjusted for urinary creatinine (continuous, mg/dL) to account for urinary dilution. e: excludes arsenobetaine and arsenocholine. Amount of variation of lead, cadmium, mercury, and arsenic exposure explained by diet among children versus adults.