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Table 2 Comparison of pre-, intro- and post-operative data between the two groups

From: Risk factors for endotracheal re-intubation following coronary artery bypass grafting

  Re-intubation Non-re-intubation P 
  n = 97 n = 1147  
Preoperation    
Female 25(25.8%) 268(23.4%) 0.65
Age (years) 64.6 ± 7.2 62.5 ± 8.1 0.05
BMI (kg/m2) 25.8 ± 2.3 24.8 ± 1.8 0.04
Smoking history 36(37.1%) 325(28.3%) 0.38
AMI 15(15.5%) 67(5.8%) 0.09
Renal dysfunction 5(5.1%) 32(2.8%) 0.25
Hypertension 43(44.3%) 526(45.9%) 0.71
Diabetes 29(29.9%) 214(18.7%) 0.12
Severe COPD 26(26.8%) 52(4.5%) 0.01
LVEF 0.52 ± 0.11 0.55 ± 0.08 0.02
LVEDD 52.9 ± 7.9 51.3 ± 5.5 0.07
CHF 21(21.6%) 48(4.2%) 0.01
PaO2 (mmHg) 72.9 ± 11.5 68.3 ± 8.6 0.04
PaCO2 (mmHg) 41.3 ± 4.1 40.9 ± 3.6 0.09
Hypoalbuminemia 2(2.1%) 21(1.8%) 0.81
Ventricular aneurysm 3(3.1%) 25(2.2%) 0.54
Left main trunk disease 8(8.2%) 79(6.9%) 0.74
Number of diseased vessels2.8 ± 0.8   2.7 ± 0.6 0.37
Intro-operation    
Use of CPB 36(37.1%) 389(33.9%) 0.79
CPB time 110.8 ± 18.6 109.5 ± 15.8 0.45
ACC time 70.4 ± 13.7 68.2 ± 12.3 0.4
Bypass graftings 3.2 ± 0.8 3.1 ± 0.7 0.88
Operation time 187.4 ± 37.9 183.9 ± 40.7 0.55
Post-operation(before re-intubation)    
Relative hypoxemia 41(42.3%) 102(8.9%) 0.02
Pneumonia 23(23.7%) 68(5.9%) 0.02
Relative hypercapnia 17(17.5%) 57(5%) 0.08
LCOS 4(4.1%) 46(4%) 0.89
AMI 1(1%) 3(0.3%) 0.08
IABP 3(3.1) 68(5.9%) 0.32
AF 15(15.5%) 87(7.6%) 0.53
VF 1(1%) 2(0.1%) 0.08
AKI 8 (8.2%) 19(1.7%) 0.01
Stroke 2(2.1%) 25(2.2) 0.96
Re-operation for bleeding 5(5.1%) 52(4.5%) 0.57
Infection of incision 2(2.1%) 18(1.6) 0.47
TMVT (days) 3.8 ± 2.5 1.6 ± 0.5 0.01
  1. BMI: body mass index; AMI: acute myocardial infarction; COPD: chronic obstructive pulmonary diseases; LVEF: left ventricular ejection fraction; LVEDD: left ventricular end-diastolic dimension; CHF: chronic heart failure; CPB: cardiopulmonary bypass; ACC: aortic cross clamping; LCOS: low cardiac output syndrome; IABP; intro-aortic balloon pump; AF: atrial fibrillation; VF: ventricular fibrillation; AKI: acute kidney injury; TMTV: total mechanical ventilation time.