Table 2 Body composition obtained by MRI or DXA as a reference and predicted by BIA obtained in a standing and lying position with ‘8-electrode’ segmental or conventional wrist-to-ankle technique in the Caucasian population. Goodness of fit of BIA equations was assessed by R2 and precision by the PE

From: Quantification of whole-body and segmental skeletal muscle mass using phase-sensitive 8-electrode medical bioelectrical impedance devices

 

Mean±s.d.

PE

R2

MRI

 SMM total body (kg)

26.8±6.9

  

 SMM arms (kg)

3.41±1.09

  

 SMM legs (kg)

11.46±2.59

  

 VAT (l)

1.6±1.4

  

DXA

 LST arms (kg)

6.00±1.95

  

 LST legs (kg)

18.07±3.92

  

BIA standing segmental

 SMM total body (kg)

26.8±6.8

1.2

0.97

 SMM arms (kg)

3.41±1.07

0.27

0.94

 SMM legs (kg)

11.45±2.45

0.76

0.91

 VAT (l)

1.6±1.2

0.6

0.81

 LST arms (kg)

6.04±1.93

0.42

0.95

 LST legs (kg)

18.15±3.88

0.81

0.96

BIA supine segmental

 SMM total body (kg)

26.8±6.8

1.2

0.97

 SMM arms (kg)

3.41±1.06

0.26

0.94

 SMM legs (kg)

11.46±2.47

0.73

0.92

 VAT (l)

1.6±1.2

0.6

0.80

 LST arms (kg)

5.99±1.90

0.42

0.95

 LST legs (kg)

18.07±3.81

0.83

0.95

BIA supine wrist–ankle

 SMM total body (kg)

26.7±6.7

1.3

0.96**

 VAT (l)

1.6±1.2

0.6

0.79

  1. Abbreviations: BIA, bioelectrical impedance analysis; BMI, body mass index; DXA, dual X-ray absorptiometry; LST, lean soft tissue; MRI, magnetic resonance imaging; PE, pure error; R2, determination coefficient; SMM, skeletal muscle mass; VAT, visceral adipose tissue.
  2. **P<0.01, significant difference in correlation from supine segmental BIA.
Back to article page