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Table 1 Basic patient characteristics

From: Incidence, timing and outcome of AKI in critically ill patients varies with the definition used and the addition of urine output criteria

Characteristic of patients (N = 1376)  
Age (years; mean (sd)) 60 (16)
Male sex (N (%)) 864 (62.8)
Body Mass Index (kg/m2, mean(sd)) 26 (5.2)
APACHE IV (mean(sd)) 52 (25)
Admission type
 • Medical (N (%)) 461 (33.5)
 • Surgical (N (%)) 914 (66.4)
  ◦ scheduled (N (%)) 727 (52.8)
  ◦ emergency (N (%)) 187 (13.6)
Co morbidity
 • diabetes mellitus (N (%)) 221 (16.1)
 • chronic kidney disease (N (%)) 58 (4.2)
 • chronic dialysis (N (%)) 24 (1.7)
ICU LoS (days; median [IQR]) 2 [2.0–3.0]
ICU mortality (N (%)) 77 (5.6)
Hospital mortality (N (%)) 129 (9.4)
Serum creatinine at admission (μmol/l; median [IQR]) (N = 1369) 73 [58–93]
Acute kidney injury in first 7 days of admission
 • RIFLE (N (%)) 210 (15.2)
  ◦ With UO criteria (N (%))
 • AKIN (N (%))
475 (34.5)
294 (21.4)
  ◦ With UO criteria (N (%)) 524 (38.1)
 • KDIGO (N (%)) 281 (20.4)
  ◦ With UO criteria (N (%)) 517 (37.6)
 • Urine output RIFLE (N (%)) 265 (19.3)
 • Urine output AKIN (N (%)) 230 (16.7)
 • Urine output KDIGO (N (%)) 236 (17.2)
Renal replacement therapy (N (%)) 62 (4.5)
  1. IQR interquartile range
  2. N number of patients
  3. APACHE IV Acute Physiology and Chronic Health Evaluation IV
  4. ICU intensive care unit
  5. LoS length of stay
  6. UO urine output