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Table 4 External cross-validation of published bioimpedance-based equations for the prediction of ALM in 195 Asian Korean people in the current study

From: Two-megahertz impedance index prediction equation for appendicular lean mass in Korean older people

  Predicted ALM
(kg)
R2a Biasb
(kg)
LoA
(kg)
Pc TE
(kg)
Subjective Rating Ry-y’, meand PIA
(%)
Measured ALM 17.44 ± 3.71       Male Female   
Supine position
 Kim@2MHz_BWA2.0 17.45 ± 3.58 0.931 -0.01 ± 0.97 -1.92, 1.90 .875 0.97 Excellent Very good 0.131 (P = .068) 82.1
 Vermeiren, et al. [15] 15.66 ± 3.37 0.918 1.78 ± 1.08 -0.33, 3.89 .000 2.08 Poor Poor 0.319 (P = .000) 32.8
 Scafoglieri, et al. [17] 17.51 ± 1.86 0.630 -0.07 ± 2.50 -4.98, 4.84 .702 2.50 Poor Poor 0.776 (P = .000) 28.2
 Sergi, et al. [16] 23.62 ± 3.42 0.836 -6.18 ± 1.50 -9.12, -3.23 .000 6.36 Poor Poor 0.199 (P = .005) 00.5
 Kyle, et al. [19] 22.65 ± 4.09 0.847 -5.21 ± 1.60 -8.36, -2.07 .000 5.45 Poor Poor -0.245 (P = .000) 00.5
 Kim, et al. [20] 9.41 ± 2.37 0.885 8.03 ± 1.68 4.74, 11.32 .000 8.21 Poor Poor 0.806 (P = .000) 00.0
 Peniche, et al. [18] 16.57 ± 3.99 0.845 0.87 ± 1.57 -2.21, 3.94 .000 1.79 Fair Poor -0.185 (P = .010) 55.4
  1. aR2 = the coefficient of determination shared by measured and predicted ALM, bPredicted minus measured value, cP-value for paired t-test that bias = 0, dRy-y’, mean = correlation coefficient between the bias and the mean of the reference and predicted ALM