Abstract
Objective: To analyze the precision of five anthropometric skinfold formulas at predicting percent body fat (% BF) in female PKU adolescents when compared with standard results from ADP. Design: Skinfold and ADP measurements were recorded from a cross-section of female PKU patients, aged 10–19 years. ADP was chosen as the comparative standard. Anthropometric values were used to calculate % BF with formulas created by Slaughter, Peterson, Wilmore, Durnin, and Jackson. Bland-Altman agreement analysis determined the efficacy of formulas versus ADP at predicting % BF. Results: Formulas by Peterson and Durnin had the smallest estimation errors (7% and 3%); Slaughter's had the greatest estimation error (19%). Peterson's formula had the smallest mean difference from ADP and the smallest standard deviation (0.76±4.8), whereas Slaughter's had the largest (−7.7±7.4). All formulas, except for Peterson's (P=0.23), showed a statistically significant difference (P<0.05) from ADP. Conclusions: This investigation revealed Peterson's equation to have superior precision in calculating % BF within the female adolescent PKU population. Slaughter's equation was the least reliable at accurately determining %BF. Therefore, Peterson's formula is recommended when performing anthropometric analysis of body composition in the female PKU adolescent population. Funded by: Emory Hospital General Clinical Research Center
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