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Table 1 Pre-intra-and postoperative characteristics among patients with and without SWI

From: Superficial and deep sternal wound infection after more than 9000 coronary artery bypass graft (CABG): incidence, risk factors and mortality

Variables Group 1* (n = 9157) Group 2** (n = 44) P value
Age (mean ± SD) 58.5 ± 9.7 60.1 ± 8.7 0.173
BMI (mean ± SD) 27 ± 4 28.3 ± 4 0.032
Female % 25.5 52.3 < 0.001
Smoking % 39.5 34.1 0.467
Diabetes % 33.7 59.1 < 0.001
Hypercholesterolemia % 61 65.9 0.508
Hypertension % 49.7 90.9 < 0.001
PVD % 1.8 2.8 0.666
Length of preoperative hospital stay (days) (mean ± SD) 8.2 ± 4.9 9.4 ± 6.1 0.098
CCS (Functional class) (mean ± SD) 2.1 ± 0.8 2.6 ± 0.7 < 0.001
LVEF (mean ± SD) 49.1 ± 10.2 50.7 ± 11.2 0.260
Graft number (mean ± SD) 3.6 ± 0.9 3.6 ± 1 0.928
Cross clamp time (minute) (mean ± SD) 42.4 ± 41.5 45 ± 16.4 0.686
Perfusion time (minute) (mean ± SD) 70.1 ± 26 75.2 ± 23.5 0.207
Re-exploration for bleeding 1% 13.6% < 0.001
Intubation time (hours) (mean ± SD) 8.9 ± 13.6 54.1 ± 172.1 < 0.001
  1. Body mass index, BMI; Peripheral vascular disease, PVD; Canadian Cardiovascular Society classification, CCS; left ventricular ejection fraction, LVEF
  2. * Without sternal wound infection
  3. ** With sternal wound infection