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Table 2 Summary of regression and Bland-Altman analysis before and after weight-loss compared to DXA

From: Validity of air-displacement plethysmography in the assessment of body composition changes in a 16-month weight loss program

  Regression Bland-Altman
  Intercept Slope R2 SEE Bias 95% Limits p Value
Before weight-loss
ADP %fat 6.6671 0.937 0.845 2.056 -4.0123 0.128 to 8.152 0.648
After weight-loss (16 months)
ADP %fat 4.9561 0.969 0.884 2.183 -3.7603 0.600 to 8.120 0.408
Δ (before – after weight-loss)
ADP %fat -0.6181 0.902 0.763 2.182 0.252 -4.168 to 4.672 0.665
  1. 1 Significantly different from 0 (p ≤ 0.05).
  2. 2 Significantly different from 1 (p ≤ 0.001).
  3. 3 Bland-Altman analysis bias is the mean difference between ADP and DXA (p ≤ 0.001) with the trend between DXA and ADP not significant at any time point (i.e. no bias between techniques was observed).