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Table 1 Comparision of the demographic, socioeconomic, and clinical information between CRRT group and control group

From: Postoperative acute kidney injury requiring continuous renal replacement therapy and outcomes after coronary artery bypass grafting: a nationwide cohort study

Variable CRRT (n = 214) Control (n = 14,901) P-value
Age, year 69.4 (10.6) 65.6 (10.2)  < 0.001
Sex, Male 124 (57.9) 10,951 (73.5)  < 0.001
Residence at CABG    0.768
 Capital city 45 (21.0) 3399 (22.8)  
 Other metropolitan city 38 (17.8) 2730 (18.3)  
 Other area 131 (61.2) 8772 (58.9)  
Income level at CABG    0.073
 Q1 42 (19.6) 2679 (18.0)  
 Q2 52 (24.3) 3528 (23.7)  
 Q3 32 (15.0) 3320 (22.3)  
 Q4 88 (41.1) 5374 (36.1)  
Charlson comorbidity index at CABG     < 0.001
 0–3 23 (10.7) 3264 (21.9)  
 4–5 59 (27.6) 4060 (27.2)  
  ≥ 6 132 (61.7) 7577 (50.8)  
Intraoperative CPB use     < 0.001
 Off Pump CABG 43 (20.1) 8011 (53.8)  
 On Pump CABG 171 (79.9) 6890 (46.2)  
The number of coronary artery graft     < 0.001
 1 51 (23.8) 2405 (16.1)  
  ≥ 2 163 (76.2) 12,496 (83.9)  
Total number of hospital bed     < 0.001
 Q1 ≤ 904 65 (30.4) 3723 (25.0)  
 905 ≤ Q2 ≤ 1119 70 (32.7) 3870 (26.0)  
 1120 ≤ Q3 ≤ 2413 62 (29.0) 4547 (30.5)  
 2414 ≤ Q4 17 (7.9) 2761 (18.5)  
Length of hospital stay for CABG, day 18.0 (10.6) 15.5 (7.9)  < 0.001
Newly diagnosis of CKD requiring RRT 17 (7.9) 431 (2.9)  < 0.001
Urgent or Emergency CABG 34 (15.9) 2464 (16.5) 0.800
The year of CABG    0.883
 2012 31 (14.5) 2450 (16.4)  
 2013 29 (13.6) 2183 (14.7)  
 2014 37 (17.3) 2384 (16.0)  
 2015 41 (19.2) 2889 (19.4)  
 2016 45 (21.0) 3168 (21.3)  
 2017 31 (14.5) 1827 (12.3)  
  1. CABG coronary artery bypass grafting; CRRT continuous renal replacement therapy; CPB cardiopulmonary bypass; CKD chronic kidney disease; RRT renal replacement therapy