Comparison of the selected pre- and intraoperative variables between SVGD (+) and SVGD (−) patients.

aCategorical variables are presented as the number (%) and continuous variables as the mean ± standard deviation;ball severely stenotic or occluded native coronary arteries were grafted.Abbreviations: BMI = body mass index; CAD = coronary artery disease; CCAB = conventional coronary artery bypass (in the extracorporeal circulation); COPD = chronic obstructive pulmonary disease; HDL = high density lipoproteins; LDL = low density lipoproteins; LVEF = left ventricular ejection fraction (by echocardiography); OPCAB = off-pump coronary artery bypass; PCI = percutaneous coronary intervention; PLT = platelet count; RBC = red blood cell count; SVGD = saphenous vein graft disease; WBC = white blood cell (leucocyte) count.