Table 6.
Prediction equations to estimate 24 h Na using correction applied for both spot Na and spot Cr using the Kawasaki equation (mmoL/day).
| Statistics | Measured 24 h Urinary Sodium Excretion | Kawasaki Spot 1 | Kawasaki Mean Day 1 and 2 | Kawasaki Adjusted Day 1 and 2 | Kawasaki Mean Day 1, 2, and 3 | Kawasaki Adjusted Day 1, 2, and 3 |
|---|---|---|---|---|---|---|
| Minimum | 32.00 | 130.04 | 203.27 | 212.56 | 281.76 | 245.04 |
| p5 | 49.00 | 288.74 | 341.67 | 331.53 | 357.15 | 341.13 |
| p10 | 56.00 | 349.23 | 373.04 | 403.65 | 366.99 | 422.93 |
| p25 | 66.00 | 445.93 | 428.95 | 524.98 | 415.92 | 526.37 |
| p50 | 107.00 | 680.59 | 615.32 | 685.76 | 620.88 | 671.39 |
| p75 | 154.00 | 913.44 | 838.75 | 824.38 | 834.91 | 791.88 |
| p90 | 201.00 | 1033.24 | 939.30 | 907.04 | 990.56 | 904.10 |
| p95 | 220.00 | 1060.30 | 940.61 | 961.78 | 1001.26 | 953.36 |
| IQR | 88.00 | 467.50 | 409.79 | 299.39 | 418.99 | 265.51 |
| Maximum | 232.00 | 1360.01 | 975.35 | 1102.78 | 1013.84 | 1048.92 |
| Mean | 115.00 | 693.41 | 633.74 | 660.08 | 635.66 | 654.93 |
| SD | 56.33 | 290.66 | 227.94 | 210.98 | 223.79 | 198.86 |
| p-value * | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | |
| Spearman correlation coefficient | 0.1650 | 0.3192 | 0.2292 | 0.2806 | 0.2085 | |
| p-value correlation | 0.4518 | 01377 | 0.2927 | 0.1946 | 0.3397 |
* p-value of difference between measured 24 h urinary sodium excretion and each prediction equation using Kawasaki was assessed by Wilcoxon’s signed rank test. Na: sodium, Cr: creatinine.