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| accu measurebody fat caliper, medical, sport supplements, digital caliper, body impedance, metabolic advantage, for, food recipes, dual energy x-ray absorptiometry (dxa), marine habitats, | Furthermore, women and muscle from our own experience, women and muscle hydrodensitometry, which was used as the reference method by Durnin and Womerseley, presents methodical limitations because of the difficulties in the procedures when overweight subjects are being measured. Moreover, Durnin and Womersley did not cross-validate their equations, and the number of overweight subjects included in their population samples was not specified. A clear improvement in the BF% estimates was observed using the equation of Peterson et al., explainable by their improved approach in developing the equation (cross-validation and use of the four-compartment model). |
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| and Durnin and Womersley, digital caliper and no subject in our equation showed absolute differences between 10% and 20%, contrary to the other two other tested equations. In our cohort, the lower and upper limits of agreement according to Durnin and Womersley were –21.4% and 18.0%. The Peterson et al. equation showed much lower underestimation compared with the Durnin and Womerseley equation, with –9.3% as a lower limit digital caliper and 8.3% as an upper limit. The level of underestimation further decreased by using our equation with –7.6% as lower and 7.6% as upper limits. The low accuracy in the Durnin digital caliper and Womersley estimation can be explained by a systematic overestimation of body density derived from the errors in the assumptions of the two-compartment model (46) . |
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