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Table 3 Hazard ratios of baseline characteristics for all-cause mortality among coronary artery bypass surgery patients (univariate analysis)

From: Elevated preoperative neutrophil/lymphocyte ratio as a predictor of increased long-term survival in minimal invasive coronary artery bypass surgery compared to sternotomy

Variable Hazard ratio (95% confidence interval) p Value
Male 0.63 (0.45–0.87) 0.005
Age (per year) 1.06 (1.06–1.09) <0.001
Race (Caucasian) 1.40 (0.78-2.53) 0.26
Body Mass Index (kg/m2) (31+)   
18–25 1.35 (0.90–2.03) 0.14
26–30 1.11 (0.75–1.64) 0.60
Ejection fraction (%) 1.01 (0.99–1.02) 0.46
Hypertension 1.31 (0.89–1.93) 0.17
Smoking 0.89 (0.65–1.23) 0.48
Chronic pulmonary disease 2.02 (1.37–2.96) <0.001
Prior myocardial infarction 1.00 (0.73–1.37) 0.99
Prior coronary angioplasty 1.16 (0.81–1.65) 0.41
Prior coronary artery bypass graft 0.67 (0.21–2.09) 0.48
Congestive heart failure 1.64 (1.11–2.43) 0.01
Prior cerebrovascular event 1.79 (1.22–2.62) 0.003
Family history of coronary artery disease 0.56 (0.39–0.80) 0.001
Renal Failure on Dialysis 3.95 (2.19–7.12) <0.001
Diabetes Mellitus 1.60 (1.17–2.21) 0.004
Peripheral arterial disease 1.39 (0.91–2.14) 0.12
Pre-Operative CCS 1.01 (0.87–1.18) 0.85
Pre-Operative NYHA 0.86 (0.71–1.06) 0.15
Pre-Operative Leukocyte 1.05 (0.99–1.11) 0.11
Pre-Operative Neutrophils 1.08 (1.02–1.15) 0.01
Pre-Operative Lymphocytes 0.69 (0.55–0.88) 0.003
Pre-Operative Monocytes 1.46 (0.91–2.36) 0.11
Pre-Operative Creatinine 1.20 (1.09–1.31) <0.001
Pre-Operative Glucose 1.00 (1.00–1.01) <0.001
Pre-Operative NLR 1.09 (1.06–1.13) <0.001
Operative and postoperative data   
Internal mammary artery used 0.35 (0.21–0.57) <0.001
Number of conduits used for bypass 0.96 (0.82–1.13) 0.64
Renal failure on dialysis 6.80 (3.91–11.80) <0.001
Cardiopulmonary bypass 1.76 (1.11–2.79) 0.01
New onset atrial fibrillation 2.03 (1.41–2.91) <0.001
Septicemia 6.95 (3.54–13.65) <0.001
  1. CCS Canadian Cardiovascular Society Angina classification system, NLR neutrophil lymphocyte ratio, NYHA  New York Heart Association Functional Classification.