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)

Agreement (L)

Weight (kg) ± SD

Height (cm) ± SD

Method

± SD (L)

Slope

Intercept

r

r²

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

* 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.

Moon et al. Nutrition & Metabolism 2008 5:7   doi:10.1186/1743-7075-5-7