In Reply We thank Gallant et al for their interest in our recent publication regarding the association of body mass index (BMI) with thyroid cancer in children with thyroid nodules. We agree that differences in design may account for some discrepancies between our study and theirs. Different methods of calculating BMI z-scores might play a role, although our selection of the Centers for Disease Control and Prevention nomograms reflects their wide use in clinical practice. Similarly, our use of nodule diameter rather than nodule volume reflec ts current recommendations for thyroid nodule evaluation, and is unlikely to be relevant given the excellent correlation of these measures in our cohort (r = 0.97; 95% CI, 0.96-0.97).
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