Table 1 Baseline and intraoperative characteristics

Number of patients

554

229

Demographics

 Age (yr)

63.9 ± 9.2

63.7 ± 9.4

0.852

 Male sex

431 (77.8)

179 (78.2)

0.910

 Body mass index (kg/m²)

24.6 ± 3.1

24.6 ± 3.1

0.706

 EuroSCORE (logistic)

3.6 ± 3.6

3.5 ± 5.1

0.050

 Diabetes mellitus

263 (47.5)

99 (43.2)

0.279

 Hypertension

365 (65.9)

151 (65.9)

0.988

 Smoker, current

174 (31.4)

58 (25.3)

0.090

 Previous myocardial infarction

69 (12.5)

43 (18.8)

0.022

 Congestive heart failure

16 (2.9)

12 (5.2)

0.107

 s/p PTAC c stent

108 (19.5)

50 (21.8)

0.458

 Cerebrovascular disease

145 (26.2)

44 (19.2)

0.038

 Peripheral vascular disease

61 (11.0)

18 (7.9)

0.183

 eGFR <60 ml/min/1.73 m²

81 (14.6)

35 (15.3)

0.812

 Liver disease

25 (4.5)

2 (0.9)

0.011

 Left main coronary artery disease

128 (23.1)

48 (21.0)

0.513

 Coronary angiography <5 days

177 (31.9)

78 (34.1)

0.566

 Hematocrit (%)

38.5 ± 4.8

38.7 ± 5.4

0.710

 Creatinine (mg/dl)

1.0 ± 0.4

1.0 ± 0.4

0.469

 Total bilirubin (mg/dl)

0.8 ± 0.3

0.6 ± 0.3

<0.001

 Albumin (g/dl)

3.9 ± 0.4

3.8 ± 0.5

0.105

 Uric acid (mg/dl)

5.5 ± 1.5

5.6 ± 1.6

0.745

Left ventricular ejection fraction (%)

56.4 ± 10.0

57.1 ± 10.5

0.165

 ACEI or ARB

249 (44.9)

105 (45.9)

0.817

 β-blocker

381 (68.8)

152 (66.4)

0.513

 Calcium channel blocker

416 (75.1)

159 (69.4)

0.103

 Insulin

127 (22.9)

43 (18.8)

0.200

 Oral hypoglycemic agent

209 (37.7)

85 (37.1)

0.873

 Statin

431 (77.8)

202 (88.2)

0.001

 Aspirin

418 (75.5)

201 (87.8)

<0.001

 Clopidogrel

298 (53.8)

146 (63.8)

0.010

 Diuretics

104 (18.8)

43 (18.8)

0.999

 Anesthesia time (min)

295 [267–335]

300 [275–340]

0.151

 Operation time (min)

228 [200–267]

230 [200–262]

0.882

 Grafts per patient (n)

3 [2–4]

3 [2–3]

0.015