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Table 1 Patient characteristics of all study patients (N = 1,568) and patients with and without AKI

From: Six-month survival and quality of life of intensive care patients with acute kidney injury

  Data available (of 1,568) All patients (N = 1,568) No AKI patients (N = 933) AKI patients (N = 635)
   N (%) or median (IQR) N (%) or median (IQR) N (%) or median (IQR)
 Age (years) 1,568 65 (53 to 74) 64 (50 to 73) 66 (56 to 76)
 Gender (male) 1,568 1015 (64.7) 583 (62.5) 432 (68.0)
 Baseline serum/plasma creatinine (μmol/l) 1,088 78 (63 to 95) 77 (61 to 93) 79 (65 to 101)
Co-morbidity
 Chronic obstructive pulmonary disease 1,560 169 (10.8) 91 (9.8) 78 (12.3)
 Hypertension 1,567 759 (48.4) 411 (44.1) 348 (54.8)
 Arteriosclerosis 1,554 236 (15.1) 116 (12.6) 120 (18.9)
 Diabetes 1,568 359 (22.9) 200 (21.4) 159 (25.0)
 Systolic heart failure 1,561 219 (14.0) 115 (12.3) 104 (16.5)
 Chronic kidney disease 1,562 127 (8.1) 48 (5.1) 79 (12.4)
Admission type
 Emergency 1,540 1,287 (82.1) 751 (81.9) 536 (86.0)
 Surgical 1,568 618 (39.4) 377 (40.4) 241 (38.0)
APACHE II Diagnostic group
 Cardiovascular, operative   355 (22.6) 208 (22.3) 147 (23.2)
 Cardiovascular, non-operative   231 (14.7) 121 (13.0) 110 (17.3)
 Respiratory tract, non-operative   184 (11.7) 115 (12.3) 69 (10.9)
 Gastrointestinal tract, operative   152 (9.7) 86 (9.2) 66 (10.4)
 Metabolic   133 (8.5) 93 (10.0) 40 (6.3)
 Sepsis   99 (6.3) 43 (4.6) 56 (8.8)
 Gastrointestinal tract, non-operative   92 (5.9) 48 (5.1) 44 (6.9)
 Neurological, non-operative   85 (5.4) 69 (7.4) 16 (2.5)
 Trauma   70 (4.5) 52 (5.6) 18 (2.8)
 Other (<5% each)   167 (10.7) 98 (10.5) 69 (10.9)
Severity and outcome
 SOFA (first 24 hours, points) 1,568 7 (5 to 10) 6 (4 to 8) 9 (6 to 11)
 SAPS II score (points) 1,568 36 (27 to 49) 32 (25 to 43) 42 (33 to 58)
 Length of ICU stay (days) 1,568 2.8 (1.6 to 5.4) 2.1 (1.3 to 4.4) 3.8 (2.0 to 7.1)
 Length of hospital stay (days) 1,566 9 (5 to 17) 8 (5 to 14) 11 (5 to 19)
 Six-month mortality 1,568 378 (24.1) 154 (16.5) 224 (35.3)
  1. APACHE II, Acute Physiology and Chronic Health Evaluation II; SAPS II, Simplified Acute Physiology Score; SOFA, Sequential Organ Failure Assessment.