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Table 1 Subject descriptive characteristics and the validation of BIS for predicting total body water compared to deuterium oxide (n = 28, 14 men, 14 women)

From: Total body water estimations in healthy men and women using bioimpedance spectroscopy: a deuterium oxide comparison

            Agreement (L)
  Weight (kg) x ¯ ± SD Height (cm) x ¯ ± SD Method x ¯ ± SD (L) Slope Intercept r r 2 SEE (L) TE (L) CE /Bias Upper Limits Lower Limits Trend
All Subjects 72.8 ± 17.58 174.6 ± 8.7 4000B 38.28 ± 10.71 0.897 6.19* 0.96 0.92 2.99 3.81 2.26* 8.39 -3.88 -0.70
    SFB7 40.63 ± 10.69 0.920 3.18 0.98 0.96 2.12 2.21 -0.09 4.31 -4.50 -1.32
    D2O 40.54 ± 10.05           
Men 87.10 ± 12.52 181.2 ± 6.4 4000B 47.51 ± 6.43 0.767 12.59 0.81 0.66 3.75 4.05 1.50 9.15 -6.15 -0.13
    SFB7 49.81 ± 6.29 0.879 5.22 0.91 0.83 2.70 2.73 -0.80 4.49 -6.11 -0.15
    D2O 49.01 ± 6.11           
Women 58.49 ± 6.67 168.1 ± 4.9 4000B 29.05 ± 3.68 1.014 2.62 0.88 0.77 2.05 3.56 3.01* 6.87 -0.85 0.55
    SFB7 31.44 ± 4.00 0.991 0.92 0.94 0.88 1.50 1.52 0.62 3.45 -2.20 0.43
    D2O 32.06 ± 3.68           
  1. * Represents significance at (p ≤ 0.025), SFB7 = Imp™ SFB7, 4000B = XiTRON 4000B, CE/Bias = constant (mean) error,TE = total error, SEE = standard error of estimate, r = Pearson product-moment correlation coefficient, Limits = 95% limits of agreement (CE ± 1.96 SD of residual scores (predicted – actual)), Trend = relationship between the difference of D2O and BIS method (SFB7, 4000B) and the mean of both methods.