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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.