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Table 2 Mutlviariable Cox regression analysis for 1-year all-cause mortality after CABG

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

Variable Multivariable model P-value
HR (95% CI)
CRRT 7.69 (6.54, 9.05)  < 0.001
Age, year 1.06 (1.05, 1.07)  < 0.001
Sex, Male 1.07 (0.95, 1.20) 0.258
Residence at CABG   
 Capital city Capital city 1  
 Other metropolitan city 1.00 (0.85, 1.19) 0.977
 Other area 1.05 (0.91, 1.20) 0.525
Economic status at CABG   
 Q1 1  
 Q2 1.07 (0.90, 1.26) 0.460
 Q3 0.99 (0.83, 1.17) 0.880
 Q4 0.93 (0.80, 1.09) 0.356
Total hospital bed number   
 Q1 ≤ 904 1  
 905 ≤ Q2 ≤ 1119 1.07 (0.93, 1.22) 0.369
 1120 ≤ Q3 ≤ 2413 0.99 (0.83, 1.17) 0.880
 2414 ≤ Q4 0.93 (0.80, 1.09) 0.356
Charlson comorbidity index at CABG   
 0–3 1  
 4–5 0.98 (0.82, 1.17) 0.832
  ≥ 6 1.22 (1.04, 1.43) 0.014
Urgent or Emergency CABG 0.96 (0.83, 1.10) 0.521
Intraoperative CPB use   
 Off Pump CABG 1  
 On Pump CABG 1.95 (1.73, 2.19)  < 0.001
The number of coronary artery graft The number of coronary artery graft   
 1 1  
  ≥ 2 0.69 (0.61, 0.78)  < 0.001
The year of CABG   
 2012 1  
 2013 0.98 (0.81, 1.17) 0.786
 2014 0.86 (0.71, 1.03) 0.104
 2015 0.83 (0.70, 1.00) 0.044
 2016 0.83 (0.70, 0.99) 0.038
 2017 0.78 (0.64, 0.95) 0.015
  1. C-index 0.83 (0.81, 0.84)
  2. CABG coronary artery bypass grafting; HR hazard ratio; CI confidence interval; CRRT continuous renal replacement therapy; CPB cardiopulmonary bypass; CKD chronic kidney disease; RRT renal replacement therapy