Table 2.
Pre- and post-dialysis bioelectrical measurements, water compartments, body cell mass and fat-free mass for the 31 ICU patients evaluated for body composition
| Measurements | Pre-dialysis | Post-dialysis | P value |
|---|---|---|---|
| R1 (5 Khz), Ω (±SD) |
366.7 ± 73.7 |
407.1 ± 88.3 |
<0.001 |
| R2 (1 Mhz), Ω (±SD) |
425.9 ± 94.2 |
471.9 ± 116.3 |
<0.001 |
| Height2/R1, cm2/Ω (±SD) |
80.1 ± 23.6 |
72.4 ± 21.1 |
<0.001 |
| Height2/R2, cm2/Ω (±SD) |
69.7 ± 21.5 |
63.3 ± 20.5 |
<0.001 |
| Weight, kg (±SD) |
68.4 ± 11.2 |
65.1 ± 10.8 |
<0.001 |
| ECW, kg (±SD) |
22.8 ± 7.8 |
20.9 ± 7.1 |
<0.001 |
| ICW, kg (±SD) |
17.9 ± 4.4 |
16.6 ± 4.5 |
<0.001 |
| ECW/ICW (±SD) |
1.26 ± 0.2 |
1.26 ± 0.2 |
0.84 |
| BCM, kg (±SD) |
24.3 ± 3.8 |
24.0 ± 3.8 |
0.61 |
| FFMa, kg (±SD) |
49.1 ± 10.2 |
46.8 ± 9.4 |
0.03 |
| BCM/weight, % |
36.2 ± 6.3 |
37.5 ± 6.9 |
<0.001 |
| BCM/FFM, % | 50.5 ± 6.8 | 52.1 ± 7.2 | <0.001 |
aIncluding bone mineral. BCM, body cell mass; BIA, bioelectrical impedance analysis; ECW, extracellular water; FFM, fat-free mass; ICW, intracellular water; SD, standard deviation.