The American journal of clinical nutrition
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Comparative Study
Validity of body mass index compared with other body-composition screening indexes for the assessment of body fatness in children and adolescents.
Validation studies of height- and weight-based indexes of body fatness in children and adolescents have examined only small samples of school-age children. ⋯ For children and adolescents aged 2-19 y, the performance of BMI-for-age is better than that of RI-for-age in predicting underweight and overweight but is similar to that of weight-for-height.