Table 2. Patient outcomes within training and testing cohort.
Outcomes within the training and test cohort. Values are N (%). P values represent differences across the three test cohorts.
| YNHH Training Set | YNHH Validation Set | SRH | BH | P value | |
|---|---|---|---|---|---|
| N | 60,701 | 30,599 | 43,534 | 35,025 | <0.001 |
| AKI (any stage) | 11,593 (19.1) | 5,772 (18.9) | 7,416 (17.0) | 3,977 (11.4) | <0.001 |
| AKI Stage 1 | 9,366 (15.4) | 4,657 (15.2) | 6,194 (14.2) | 3,157 (9.0) | <0.001 |
| AKI Stage 2 | 1,578 (2.6) | 758 (2.5) | 916 (2.1) | 542 (1.5) | <0.001 |
| AKI Stage 3 | 657 (1.1) | 364 (1.2) | 308 (0.7) | 295 (0.8) | <0.001 |
| Sustained AKI | 6,196 (10.2) | 3,056 (10.0) | 3,463 (8.0) | 2,070 (5.9) | <0.001 |
| Renal replacement therapy | 341 (0.6) | 204 (0.7) | 117 (0.3) | 135 (0.4) | <0.001 |
| Death | 1,698 (2.8) | 868 (2.8) | 696 (1.6) | 760 (2.2) | <0.001 |
Abbreviations: AKI, acute kidney injury; BH, Bridgeport Hospital; SRH, Saint Raphael's Hospital; YNHH, Yale New Haven Hospital.