Table 1 Comparison of preoperative clinical variables and postoperative outcome by patients groups

Age -- year

64 ± 10

66 ± 10

64 ± 10

61 ± 9

0.001

Male sex

3142 (85%)

750 (77%)

1599 (84%)

793 (95%)

0.001

Heart Failure NYHA ≥ 2

526 (14%)

293 (30)%

176 (9%)

57 (7%)

0.001

Diabetes

590 (16%)

210 (17%)

311 (16%)

69 (8%)

0.004

3-vessel disease

2657 (72%)

553 (57%)

1282 (68%)

822 (99%)

0.001

Left main lesion

620 (17%)

170 (18%)

352 (19%)

98 (12%)

0.005

LV ejection fraction %

59 ± 13

51 ± 16

60 ± 12

61 ± 12

0.001

Distal Anastomoses

3 ± 0.8

2.9 ± 0.9

2.9 ± 0.8

3.4 ± 0.6

0.001

Distal Arterial Anastomoses

2.4 ± 1

1.2 ± 0.4

2.5 ± 0.6

3.4 ± 0.6

0.001

 DAA = 1

795 (22%)

795 (82%)

0

0

0.001

 DAA = 2

1142 (31%)

163 (16.9%)

979 (52%)

0

 DAA = 3

1337 (36%)

9 (0.9%)

813 (43%)

515 (62%)

 DAA ≥ 4

411 (11%)

2 (0.2%)

91 (5%)

318 (38%)

Single ITA

1208 (33%)

969 (100%)

239 (13%)

0

N/A

Both ITA

2477 (67%)

0

1644 (87%)

833 (100%)

N/A

Sequential ITA

1377 (37%)

162 (17%)

895 (48%)

320 (38%)

0.001

Associated GEA

1072 (29%)

0

239 (13%)

833 (100%)

N/A

Associated Vein

1572 (43%)

969 (100%)

599 (32%)

4 (5%)

0.001

Complete Revascularization

2284 (62%)

460 (47%)

1130 (60%)

694 (83%)

0.001

Clamp Time – min.

51 ± 14

44 ± 12

49 ± 14

59 ± 13

0.01

CPB time – min.

68 ± 21

66 ± 17

65 ± 17

76 ± 27

0.01

1-month Mortality

59 (1.6%)

21 (2.1%)

27 (1.4%)

11 (1.3%)

0.432

Mean Follow-up--year

13.1 ± 7.3

11.5 ± 7.4

12.9 ± 6.9

15.1 ± 7.5

0.001

Lost of follow-up at 1 year

112 (3%)

34 (3.5%)

52 (2.7%)

26 (3.1%)

0.321