Table III.
Concordance analysis for FM (%) and FFM [kg] measurements ADP/DXA and BIS/DXA
| Variable | HF (n = 52) | HFrEF (n = 33) | HFpEF (n = 19) | REF (n = 20) | All (n = 72) |
|---|---|---|---|---|---|
| FM (%) from ADP vs. DXA: | |||||
| CCC | 0.76 | 0.76 | 0.74 | 0.91 | 0.86 |
| 95% CI | 0.64–0.85 | 0.59–0.86 | 0.47–0.88 | 0.81–0.96 | 0.79–0.90 |
| R | 0.87 | 0.89 | 0.80 | 0.92 | 0.89 |
| xD ±1.96 SD | –3.92 ±8.08 | –4.70 ±7.74 | –2.68 ±8.21 | 0.1 ±7.65 | –2.71 ±8.08 |
| Cb | 0.91 | 0.89 | 0.91 | 1.0 | 0.95 |
| FFM [kg] from ADP vs. DXA: | |||||
| CCC | 0.93 | 0.92 | 0.93 | 0.97 | 0.95 |
| 95% CI | 0.88–0.96 | 0.85–0.96 | 0.84–0.97 | 0.92–0.99 | 0.91–0.97 |
| R | 0.94 | 0.94 | 0.94 | 0.98 | 0.95 |
| xD ±1.96 SD | 1.30 ±7.30 | 1.60 ±6.20 | 0.70 ±9.10 | –1.8 ±5.80 | 0.40 ±7.50 |
| Cb | 0.99 | 0.98 | 0.99 | 0.99 | 0.99 |
| FM (%) from BIS vs. DXA: | |||||
| CCC | 0.69 | 0.79 | 0.53 | 0.71 | 0.74 |
| 95% CI | 0.54–0.80 | 0.61–0.89 | 0.24–0.73 | 0.45–0.86 | 0.63–0.82 |
| R | 0.81 | 0.91 | 0.80 | 0.83 | 0.88 |
| xD ±1.96 SD | 4.82 ±8.26 | 3.59 ±7.64 | 6.51 ±8.15 | 4.47 ±9.30 | 4.71 ±8.54 |
| Cb | 0.79 | 0.86 | 0.72 | 0.85 | 0.82 |
| FFM [kg] from BIS vs. DXA: | |||||
| CCC | 0.73 | 0.59 | 0.82 | 0.91 | 0.79 |
| 95% CI | 0.60–0.82 | 0.38–0.75 | 0.66–0.91 | 0.80–0.96 | 0.71–0.86 |
| R | 0.89 | 0.79 | 0.97 | 0.97 | 0.92 |
| xD ±1.96 SD | –7.2 ±10.2 | –6.90 ±12.10 | –7.70 ±6.60 | –5.20 ±6.90 | –6.60 ±9.50 |
| Cb | 0.82 | 0.75 | 0.85 | 0.93 | 0.86 |
CCC – Lin’s concordance correlation coefficient, CI – confidence interval, R – Pearson’s correlation, xD – mean of differences between DXA FM (%)/FFM [kg] and ADP FM (%)/FFM [kg] and BIS FM (%)/FFM [kg] respectively (analogous to Bland-Altman), Cb – bias correction factor.