RT Journal A1 Trasande L, Attina TM, Blustein J T1 BIsphenol a and obesity in children and adolescents—reply JF JAMA JO JAMA YR 2013 FD January 9 VO 309 IS 2 SP 134 OP 135 DO 10.1001/jama.2012.91939 UL http://dx.doi.org/10.1001/jama.2012.91939 AB In Reply: In our analysis of data from the 2003-2008 National Health and Nutrition Examination Survey (NHANES), we found associations of urinary BPA (but not other chemically similar environmental phenols) with body mass index z score and obesity in children and adolescents, whether the urinary concentration was categorized in quartiles or analyzed as a continuous variable. Dr Brent asserts that we failed to account for the lipophilic nature of BPA and therefore its propensity to be stored in the adipose tissue of obese individuals (especially compared with other environmental phenols), invalidating our use of their urinary concentrations as tests of specificity.