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Table 4 Agreement data for percent fat derived using TGV prediction equations

From: Validity of new child-specific thoracic gas volume prediction equations for air-displacement plethysmography

  Regression Residual Plot
  R2 SEE r P Mean difference(95%CI)
European American
Girls      
%FAT(adult) 0.97 1.52 0.07 0.65 2.5 (5.6;0.6)
%FAT (child-specific) 0.98 1.36 0.25 0.11 0.3 (3.3;-2.6)
Boys      
%FAT (adult) 0.97 1.84 0.19 0.44 1.4 (5.2;-2.5)
%FAT (child-specific) 0.98 1.60 0.27 0.27 0.1 (3.6;-3.3)
African American
Girls      
%FAT (adult) 0.98 1.20 -0.01 0.78 2.8 (5.2;0.5)
%FAT (child-specific) 0.98 1.11 0.19 0.38 0.8 (3.1;-1.5)
Boys      
%FAT (adult) 0.99 1.16 -0.19 0.42 1.0 (3.3;-1.2)
%FAT (child-specific) 0.99 1.13 -0.20 0.41 -0.1 (2.1;-2.4)
European
Girls      
%FAT (adult) 0.96 1.09 -0.00 0.97 1.7 (5.3;-2.0)
%FAT (child-specific) 0.95 1.24 0.28 0.11 0.1 (2.5;-2.4)
Boys      
%FAT (adult) 0.95 1.86 0.22 0.12 -0.7 (3.0;-4.35)
%FAT (child-specific) 0.98 1.16 0.04 0.77 -0.8 (2.4;-4.1)
  1. %FAT; percent body fat by air-displacement plethysmography.
  2. %FAT(adult); Percent body fat derived using thoracic gas volume predicted from adult-based proprietary equations (developed using Crapo et al. prediction of functional residual capacity and tidal volume constants for males and females) [18].
  3. %FAT (child-specific); Percent body fat derived using thoracic gas volume predicted from child-specific equations by Fields et al. [16].
  4. Dependent variable is percent body fat derived using measured thoracic gas volume.
  5. r; The Pearson correlation coefficient between the regression residuals and the criterion; criterion is percent body fat from measured thoracic gas volume).
  6. P value indicates if the r value is significant and hence, the presence of bias.
  7. SEE; Standard error of the estimate.
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