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Table 1 Comparisons of demographic and clinical variables in patients with and without postoperative AKI in isolated CABG cohort

From: Predictors of acute kidney insufficiency post isolated coronary artery bypass grafting surgery

Variables No AKI group
(N 1813)
AKI group
(N 101)
p value
Age, years    
 ≤ 65 925 (51.02) 30 (29.7)  
 65–80 788 (43.5) 56 (55.5)  
 > 80 100 (5.5) 15 (14.9) < 0.0001
Gender (male) 1490 (77.9) 80 (79.2) 0.44
Body mass index (kg/m2) 30.2 ± 17.3 30.1 ± 14.9 0.99
Positive smoking history 1231 (67.9) 59 (58.4) 0.04
Family history of IHD 803 (44.4) 45 (44.6) 0.96
Hypertension 1488 (82.1) 96 (95.1) 0.0008
Dyslipidemia 1529 (84.4) 88 (87.1) 0.45
Respiratory disease 323 (16.9) 21 (20.8) 0.67
Diabetes mellitus 770 (42.5) 65 (64.4) < 0.0001
Cerebrovascular disease 152 (8.4) 14 (13.9) 0.057
Peripheral vascular disease 149 (8.2) 19 (18.8) 0.0003
Acute myocardial infarction < 30 days 1133 (62.5) 75 (74.3) 0.017
Moderate to severe LVD 304 (16.8) 24 (24.1) 0.06
Congestive heart failure 232 (12.8) 31 (30.7) < 0.0001
Cardiogenic shock 39 (2.2) 10 (9.9) < 0.0001
NYHA grade III & IV 137 (7.6) 23 (22.8) < 0.0001
Urgency of surgery    
 Elective 1225 (67.6) 65 (64.4)  
 Urgent 507 (28.0) 25 (24.8)  
 Emergent 80 (4.4) 8 (7.9) < 0.0001
CPB time (min) 100.76 ± 47.39 106 ± 56.8 0.23
Aortic cross clamp time (min) 71.3 ± 31.2 69.3 (39.3) 0.54
Intra-aortic balloon pump 100 (5.5) 20 (19.8) < 0.0001
  1. Categorical variables are presented as number (%) and continuous variables as mean (SD)
  2. AKI acute kidney insufficiency, CABG coronary artery bypass grafting, IHD ischemic heart disease, LVD left ventricular dysfunction, NYHA New York Heart Association, CPB cardiopulmonary bypass