Table 4.
Relationship between intradialytic percentage change in extracellular water measured by bioelectrical impedance and pre-dialysis variables collected for the 31 patients
| r 2 | r | 95% CI | P | |
|---|---|---|---|---|
| Age, years |
0.02 |
-0.15 |
-0.48 to 0.21 |
0.40 |
| SAPS II at ICU admission |
0.001 |
-0.03 |
-0.38 to 0.32 |
0.85 |
| Length of ICU stay before measurements, days |
0.002 |
-0.05 |
-0.30 to 0.40 |
0.77 |
| Weight, kg |
< 0.001 |
-0.002 |
0.35 to 0.35 |
0.98 |
| Height, cm |
< 0.001 |
0.07 |
-0.28 to 0.41 |
0.68 |
| Body mass index, kg/cm2 |
< 0.001 |
0.01 |
-0.34 to 0.36 |
0.94 |
| Body temperature, °C |
0.10 |
-0.32 |
-0.60 to 0.004 |
0.08 |
| Plasma sodium concentration, mmol/L |
0.09 |
0.31 |
-0.05 to 0.59 |
0.09 |
| Plasma creatinine concentration, μmol/L |
< 0.001 |
-0.07 |
-0.41 to 0.28 |
0.69 |
| Plasma osmolality, mmol/kg |
0.02 |
-0.16 |
-0.48 to 0.20 |
0.39 |
| Ultrafiltration, L |
0.05 |
-0.22 |
-0.53 to 0.14 |
0.23 |
| Dialysate temperature, °C |
< 0.001 |
0.01 |
-0.34 to 0.36 |
0.94 |
| Dialysate sodium concentration, mmol/L | 0.03 | 0.17 | -0.21 to 0.26 | 0.34 |
P value <0.05 was considered significant, number = 31. CI, confidence interval (95%); SAPS II, Simple Acute Physiology Score.