Table 5.
Concordance of AKI designation
| Definition | Comparison | No AKI by RIFLE, AKIN, or CK | AKI Stage by RIFLE, AKIN, or CK | ||
|---|---|---|---|---|---|
| Risk/Stage 1 | Injury/Stage 2 | Failure/Stage 3 | |||
| KDIGO | RIFLE | ||||
| No AKI | 21,561 (0.6) | 0 (N/A) | 0 (N/A) | 0 (N/A) | |
| Stage 1 | 488 (3.9) | 2573 (5.6) | 0 (N/A) | 0 (N/A) | |
| Stage 2 | 1 (0) | 0 (N/A) | 722 (13.4) | 0 (N/A) | |
| Stage 3 | 20 (15.0) | 19 (42.1) | 20 (50.0) | 455 (35.4) | |
| KDIGO | AKIN | ||||
| No AKI | 21,561 (0.6) | 0 (N/A) | 0 (N/A) | 0 (N/A) | |
| Stage 1 | 365 (4.9) | 2696 (5.4) | 0 (N/A) | 0 (N/A) | |
| Stage 2 | 9 (11.1) | 0 (N/A) | 714 (13.4) | 0 (N/A) | |
| Stage 3 | 2 (0) | 12 (8.3) | 9 (0) | 491 (36.9) | |
| KDIGO | CK | ||||
| No AKI | 21,561 (0.6) | 0 (N/A) | 0 (N/A) | 0 (N/A) | |
| Stage 1 | 2114 (3.6) | 721 (8.0) | 217 (12.0) | 9 (33.3) | |
| Stage 2 | 390 (8.0) | 139 (18.0) | 147 (21.1) | 47 (21.3) | |
| Stage 3 | 126 (6.4) | 69 (34.8) | 150 (51.3) | 169 (43.2) | |
Shown are a cross-tabulation of patients with AKI according to KDIGO, RIFLE, and AKIN. Values in parentheses represent percent in-hospital mortality. KDIGO, Kidney Disease Improving Global Outcomes; AKIN, Acute Kidney Injury Network; CK, creatinine kinetics; RIFLE, Risk Injury Failure Loss ESRD; N/A, not applicable.