Table 7. Odds Ratio of AKI stages in predicting hospital mortality according to AKIN, RIFLE, and KDIGO criteria.
| Score | n | Hospital mortality (%) | Beta coefficient | Standard error | Odds rations (95% CI) | p |
|---|---|---|---|---|---|---|
| AKIN | ||||||
| No AKI | 90 | 39 | – | – | 1 (reference) | – |
| AKIN-1 | 15 | 53 | 0.097 | 0.950 | 1.101 (0.171–7.094) | 0.919 |
| AKIN-2 | 40 | 68 | 1.275 | 0.438 | 3.580 (1.518–8.442) | 0.004 |
| AKIN-3 | 97 | 85 | 2.188 | 0.386 | 8.922 (4.189–19.002) | <0.001 |
| Constant | – | – | −0.502 | 0.264 | 0.605 | 0.057 |
| RIFLE | ||||||
| No AKI | 84 | 31 | – | – | 1 (reference) | – |
| RIFLE-R | 13 | 62 | 1.312 | 0.618 | 3.112 (1.105–12.470) | 0.044 |
| RIFLE-I | 40 | 70 | 1.689 | 0.420 | 5.413 (2.377–12.327) | <0.001 |
| RIFLE-F | 105 | 86 | 2.644 | 0.367 | 14.075 (6.852–28.911) | <0.001 |
| Constant | – | – | −0.842 | 0.239 | 0.431 | <0.001 |
| KDIGO | ||||||
| No AKI | 79 | 28 | – | – | 1 (reference) | – |
| KDIGO-1 | 16 | 63 | 1.153 | 0.592 | 3.167 (0.992–10.111) | 0.042 |
| KDIGO-2 | 40 | 70 | 1.712 | 0.422 | 5.542 (2.422–12.677) | <0.001 |
| KDIGO-3 | 107 | 86 | 2.679 | 0.370 | 14.567 (7.057–30.070) | <0.001 |
| Constant | – | – | −0.865 | 0.243 | 0.421 | <0.001 |
Abbreviation: AKI, acute kidney injury, RIFLE, risk of renal failure, injury to kidney, failure of kidney function, loss of kidney function, and end-stage renal failure; AKIN, acute kidney injury network; KDIGO, kidney disease improving global outcomes.
Values in bold are statistically significant (P-value < 0.05).