Table 1: Comparison of preoperative clinical variables and postoperative outcomes by groups of patients receiving bilateral internal thoracic artery.

 

Unmatched groups

Sequential ITA

Matched groups

Sequential ITA

 

No

Yes

 

 

No

Yes

 

 

Variable

N = 820

N = 824

SMD

P value

N = 334

N = 334

SMD

P value

Propensity score

0.35 ± 0.23

0.65 ± 0.21

-1.391

< 0.001

0.55 ± 0.21

0.55 ± 0.21

-0.004

0.996

Age-year

64 ± 9

64 ± 9

0.003

0.939

64 ± 10

64 ± 9

-0.032

0.682

Male gender

655 (80%)

706 (86%)

-0.132

0.005

285 (85%)

275 (82%)

0.081

0.293

Heart failure NYHA ≥ 2

85 (10%)

91 (11%)

-0.032

0.783

40 (12%)

40 (12%)

0

1

3-vessel disease

595 (73%)

606 (74%)

-0.023

0.653

245 (73%)

239 (72%)

0.022

0.603

Left main lesion

181 (22%)

165 (20%)

0.049

0.308

74 (22%)

74 (22%)

0

1

LV ejection fraction-%

59 ± 12

61 ± 12

-0.102

0.042

60 ± 12

60 ± 12

-0.028

0.722

Diabetes

88 (11%)

124 (15%)

-0.119

0.009

45 (13%)

47 (14%)

-0.029

0.822

Associated RCA vein graft

338 (41%)

261 (32%)

0.182

< 0.001

133 (40%)

120 (36%)

0.083

0.109

Distal Anastomoses

2.8 ± 0.6

3.4 ± 0.6

-1.632

< 0.001

2.5 ± 0.6

3.4 ± 0.5

-1.521

< 0.001

Arterial Anastomoses

2 ± 0

3.1 ± 0.4

-3.872

< 0.001

2 ± 0

3.1 ± 0.3

-3.93

< 0.001

Complete Revascularization

472 (58%)

485 (59%)

-0.02

0.594

207 (62%)

196 (59%)

0.061

0.384

Clamp Time-min.

44 ± 12

55 ± 12

-0.913

< 0.001

52 ± 12

51 ± 11

0.062

0.42

CPB time-min.

61 ± 17

70 ± 16

-0.584

< 0.001

69 ± 16

67 ± 15

0.087

0.257

1-month Mortality

14 (1.7%)

6 (0.7%)

0.092

0.07

8 (2.4%)

3 (0.9%)

0.118

0.135

Mean Follow-up-year

12.5 ± 6.8

12.4 ± 6.6

0.014

0.837

11.9 ± 6

12.4 ± 6

-0.083

0.09

ITA: Internal Thoracic Artery; SMD: Standardized Mean Difference; NYHA: New York Heart Association; LV: Left Ventricular; Min: Minutes; RCA: Right Coronary Artery; CPB: Cardiopulmonary Bypass