Table 3 Patient characteristics and outcome of patients grouped by the definition used to classify AKI by serum creatinine criteria
Characteristic of patients | Group 1 No AKI N = 1078 | Group 2 RIFLE, AKIN & KDIGO AKI N = 212 | Group 3 AKIN & KDIGO AKI N = 70 | Group 4 AKIN AKI N = 14 | p value |
|---|---|---|---|---|---|
Age (years; mean (sd)) | 63 (19) | 67 (20) | 68 (15) | 54 (28) | <0.05 (*) |
Male sex (N (%)) | 681 (63.1) | 122 (57.5) | 52 (74.3) | 8 (57.1) | 0.078 |
Body Mass Index (kg/m2; mean (sd)) | 25.8 (5.6) | 26.2 (5.6) | 26 (6.2) | 25.6 (4.7) | 0.013 (****) |
APACHE IV score (mean (sd)) | 43 (25) | 76 (30) | 56 (26.5) | 51.5 (36.5) | 0.001 (***) |
Admission type | |||||
• Medical (N (%)) | 308 (28.6) | 114 (53.8) | 26 (37.1) | 12 (85.7) | 0.001 |
• Surgical | |||||
◦ Scheduled (N (%)) | 640 (59.4) | 53 (25) | 32 (45.7) | 2 (14.3) | |
◦ Emergency (N (%)) | 129 (12) | 45 (21.2) | 12 (17.1) | 0 (0) | |
Co morbidity | |||||
• diabetes mellitus (N (%)) | 149 (13.8) | 62 (29.2) | 9 (12.9) | 1 (7.1) | 0.001 |
• chronic kidney disease (N (%)) | 5 (0.5) | 48 (22.6) | 4 (5.7) | 0 (0) | 0.001 |
• chronic dialysis (N (%)) | 0 (0) | 23 (10.8) | 1 (1.4) | 0 (0) | 0.001 |
ICU Length of stay (days; median [IQR]) | 2 (2–3) | 4 (2–8) | 2 (2–4) | 13 (4–13) | 0.001 (****) |
ICU mortality (N (%)) | 37 (3.4) | 30 (14.1) | 7 (10) | 3 (21.4) | 0.001 |
Hospital mortality (N (%)) | 64 (5.9) | 51 (24.1) | 11 (15.7) | 3 (21.4) | 0.001 |