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Table 3 DXA Cross-sectional performance criteria* at the period of stability and prior to competition

From: Accuracy of DXA in estimating body composition changes in elite athletes using a four compartment model as the reference method

 

Slope

Intercept

r

s.e.e.

Agreement

     

Bias

Limits

Trend

%FMPeriod of Stability

1.03b

-3.24a

0.78

2.63

2.9

7.9, -2.2

-0.26

%FMPrior to Competition

0.97b

-3.38a

0.72

2.65

3.7

8.8, -1.4

-0.40

FMPeriod of Stability

0.95b

-1.57a

0.82

1.94

2.1

5.8, -1.7

-0.46

FMPrior to Competition

0.94b

-2.09a

0.78

1.89

2.6

6.2, -1.1

-0.29

FFMPeriod of Stability

1.09b

-3.14a

0.96

1.88

-2.7

1.1, -6.4

-0.42

FFMPrior to Competition

1.00b

3.51a

0.95

1.98

-3.2

0.6, -7.0

-0.15

  1. Abbreviations: %FM: relative fat mass; FM: fat mass; FFM: fat-free mass;
  2. *Performance criteria: slope, intercept, coefficient of correlation (r), standard error of estimation (s.e.e.) and the agreement (bias, limits and trend) between %FM, FM and FFM from the reference method and DXA
  3. aSignificantly different from 0, p < 0.05.
  4. bSignificantly different from 1, p < 0.05.