Table 6. Analysis of technical difficulty in calculating RRI as a function of the KDIGO stage.
KDIGO: Kidney disease improving global outcomes.
| KDIGO Stage | Technical difficulty | P-value | |
| No (n=122) | Yes (n=32) | ||
| 1 | 58(47.5%) | 7(21.9%) | 0.033 |
| 2 | 23(18.9%) | 9(28.1%) | |
| 3 | 46(33.6%) | 16(50%) | |