Table 2 Patient characteristics and outcome of patients grouped by AKI definition and on positive urine output criteria alone or with serum creatinine criteria
Definition | RIFLE (N = 326) | AKIN (N = 310) | KDIGO (N = 308) | ||||||
|---|---|---|---|---|---|---|---|---|---|
UO only (N = 265) | UO and SCr (N = 61) | p-value | UO only (N = 230) | UO and SCr (N = 80) | p-value | UO only (N = 236) | UO and SCr (N = 72) | p-value | |
Characteristics of patients | |||||||||
Age (years; mean (sd)) | 62 (15) | 63 (15) | 0.753 | 62 (15) | 62 (15) | 0.978 | 62 (15) | 63 (14) | 0.478 |
Male sex (N (%)) | 173 (54) | 34 (10) | 0.185 | 149 (48) | 45 (15) | 0.182 | 153 (50) | 41 (13) | 0.265 |
Body Mass Index (kg/m2; mean (sd)) | 27 (5) | 26 (6) | 0.184 | 27 (5.2) | 26 (5.7) | 0.051 | 27 (5.3) | 26 (5.8) | 0.118 |
APACHE IV score (mean (sd)) | 54 (25) | 75 (22) | 0.000 | 52 (23) | 72 (26) | 0.000 | 52 (23) | 74 (26) | 0.000 |
Admission type | |||||||||
• medical (N (%)) | 105 (32) | 22 (6.7) | 0.009 | 88 (28) | 31 (10) | 0.052 | 95 (31) | 22 (7.1) | 0.006 |
• surgical | |||||||||
◦ scheduled (N (%)) | 124 (38) | 21 (6.4) | 112 (36) | 30 (9.7) | 112 (36) | 30 (9.7) | |||
◦ emergency (N (%)) | 36 (11) | 18 (5.5) | 30 (9.7) | 19 (6.1) | 29 (9.4) | 20 (6.5) | |||
Co morbidity | |||||||||
• diabetes mellitus (N (%)) | 47 (14) | 11 (3.4) | 1 | 40 (13) | 12 (3.9) | 0.729 | 41 (13) | 11 (3.6) | 0.857 |
• chronic kidney disease (N (%)) | 3 (0.9) | 2 (0.6) | 0.236 | 2 (0.6) | 3 (0.9) | 0.110 | 2 (0.6) | 3 | 0.085 |
• chronic dialysis (N (%)) | 0 (0) | 0 (0) | na | 0 (0) | 0 (0) | na | 0 (0) | (0.97) 0 (0) | na |
ICU Length of stay (days; median [IQR]) | 3 [2–6] | 6 [3–11] | 0.000 | 3 [2–5] | 6 [3–11] | 0.000 | 3 [2–6] | 5 [3–9.8] | 0.000 |
ICU mortality (N (%)) | 13 (4.0) | 6 (1.8) | 0.139 | 8 (2.6) | 11 (3.5) | 0.002 | 10 (3.2) | 9 (2.9) | 0.021 |
Hospital mortality (N (%)) | 24 (7.4) | 13 (4.0) | 0.012 | 17 (5.5) | 19 (6.1) | 0.000 | 19 (6.2) | 17 (5.5) | 0.001 |