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Table 3 Characteristics of the matched patients with acute kidney injury (N = 662) and their propensity-matched controls (N = 662)

From: Three-year mortality in 30-day survivors of critical care with acute kidney injury: data from the prospective observational FINNAKI study

Characteristic Matched AKI patients Matched non-AKI patients Standardized difference
Male gender 462/662 (69.8) 462/662 (69.8) 0
Age 63 [53–73] 63 [52–72] 1.6
Normal functional performance 332 (50.3) 342 (51.7) −2.4
Disabled to work but no need for assistance 244 (37.0) 242 (36.6) 0.62
Some assistance required 65 (9.8) 61 (9.2) 2.0
Totally dependent on assistance 19 (2.9) 17 (2.6) 1.8
Pre-ICU risk factors for AKI    
 Hypotension 151/662 (22.8) 146/622 (22.1) 1.6
 Cardiogenic shock 25/662 (3.8) 21/662 (3.2) 3.2
 Acute liver failure 12/662 (1.8) 12/662 (1.8) 0
 Colloids 220/662 (33.2) 215/662 (32.5) 1.4
 Diuretics 214/662 (32.3) 193/662 (29.2) 6.7
 Angiotensin-converting-enzyme inhibitors 186/662 (28.1) 169/662 (25.5) 5.9
 Radiocontrast dye 146/662 (22.1) 156/662 (23.6) −3.5
 Massive transfusion 24/662 (3.6) 20/662 (3.0) 3.4
 Non-steroid anti-inflammatory drugs 60/662 (9.1) 67/662 (10.1) −3.4
 Rhabdomyolysis 20/662 (3.0) 16/662 (2.4) 3.7
Chronic kidney disease 46/658 (7.0) 32/659 (4.9) 9.0
Hypertension 349/659 (53.0) 336/659 (51.0) 3.8
Arteriosclerosis 93/657 (14.2) 88/654 (13.5) 2.0
Chronic obstructive pulmonary disease 62/660 (9.4) 70/657 (10.7) −4.0
Heart failure 71/654 (10.9) 62/658 (9.4) 4.3
Chronic liver failure 20/658 (3.0) 15/654 (2.3) 4.4
Diabetes mellitus 160/661 (24.2) 163/660 (24.7) 2.8
Malignancy 14/619 (2.3) 18/627 (2.9) −3.9
Rheumatoid disease 25/658 (3.8) 31/657 (4.7) −4.5
Thrombophilia 38/661 (5.7) 39/658 (5.9) −0.86
Emergency admission 557/662 (84.1) 560/662 (84.6) −1.3
Operative admission 267/662 (40.3) 265/662 (40.0) 0.61
Severe sepsis 207/662 (31.3) 207/662 (31.3) 0
Mechanical ventilation 469/662 (70.8) 452/662 (68.3) 5.4
Vasoactive drugs 450/662 (68.9) 426/662 (64.4) 7.6
SAPS II without age and renal components 20.0 [14.0–27.0] 20.0 [14.0–27.0] 1.3
  1. Categorical data are presented as an absolute number/count (percentage) and continuous data as median with IQR
  2. AKI acute kidney injury, ICU intensive care unit, non-op non-operative, post-op postoperative, SAPS Simplified Acute Physiology Score