| | Risk factor | AKIN I (n = 50) | AKIN II (n = 210) | AKIN III (n = 220) | value |
| | Gender (%) | f: 58; m: 42 | f: 46.2; m: 53.8 | f: 41.8; m: 58.2 | 0.11 | | Age (mean years ± SEM) | 71.5 ± 2.1 | 74.5 ± 0.8 | 72.7 ± 0.9 | 0.18 | | DOS (mean days ± SEM) | 13.7 ± 1.4 | 15.3 ± 1.2 | 14.2 ± 0.8 | 0.69 | | Preexisting CKD (%) | 46 | 68,3 | 58,6 | 0.007 | | AKI onset (outpatient vs. in-hospital, %) | o: 54.2; i: 45.8 | o: 64.7; i: 35.3 | o: 63.8; i: 36.2 | 0.38 | | Dialysis due to AKI (%) | 0 | 0,5 | 12 | <0.001 | | Survival (%) | 88 | 78,6 | 65 | <0.001 | | Renal recovery (%) | 32 | 27,1 | 17,8 | 0.023 | | Creatinine initially (micromole/L ± SEM) | 124 ± 6.4 | 169 ± 4.6 | 329 ± 17.4 | <0.001 | | CRP initially (mg/L ± SEM) | 61.2 ± 11.3 | 91.5 ± 7.7 | 100.9 ± 7.6 | 0.07 | | Vasopressor (%) | 16 | 25,2 | 39,3 | <0.001 | | Invasive ventilation (%) | 16 | 24,3 | 32,9 | 0,02 | | Arterial hypertension (%) | 84 | 90 | 90 | 0,42 | | Coronary artery disease (%) | 34 | 36,7 | 30,5 | 0,39 | | Chronic heart failure (%) | 38 | 45,2 | 38,2 | 0,29 | | Diabetes mellitus (%) | 36 | 36,2 | 38,6 | 0,85 | | Obesity (%) | 18 | 17,1 | 12,7 | 0,37 | | Neoplasia (%) | 18 | 31,6 | 30,6 | 0,15 |
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