Table 1 Patient demographics and perioperative characteristics. `expressed in n, (range) *expressed in %, (range)

Age

64

58–71

66

56–73

68

59–77

71

60–78

71

61–78

Female

24.58%

19.52 − 30.45%

21.65%

17.30 − 26.74%

26.65%

22.28 − 31.52%

34.71%

30.00 − 39.74%

26.27%

21.85 − 31.23%

BMI

28

25–33

28

25–32

28

25–32

28

25–33

29

26–33

Smoking History

56.78%

50.40 − 62.94%

64.95%

59.31 − 70.20%

56.73%

51.49 − 61.83%

53.44%

48.30 − 58.51%

63.28%

57.99 − 68.26%

Diabetes

27.54%

22.23 − 33.56%

29.55%

24.60 − 35.03%

28.65%

24.16 − 33.61%

35.81%

31.05 − 40.87%

31.94%

27.18 − 37.11%

Dyslipidaemia

57.63%

51.25 − 63.76%

69.07%

63.54 − 74.10%

68.77%

63.73 − 73.41%

66.67%

61.67 − 71.32%

70.75%

65.67 − 75.36%

Hypertension

70.73%

64.17 − 76.53%

78.01%

72.90 − 82.39%

72.21%

67.29 − 76.65%

74.10%

69.36 − 78.34%

72.54%

67.53 − 77.04%

Cerebrovascular disease

8.47%

5.38 − 13.09%

11.34%

8.19 − 15.50%

10.03%

7.30 − 13.63%

8.82%

6.32 − 12.19%

10.45%

7.61 − 14.19%

Peripheral vascular disease

5.93%

3.44 − 10.04%

6.87%

4.49 − 10.37%

7.16%

4.90 − 10.36%

5.23%

3.37 − 8.02%

5.37%

3.42 − 8.33%

Previous MI

35.17%

28.96 − 41.92%

43.64%

38.06 − 49.38%

44.99%

39.85 − 50.24%

29.48%

25.02 − 34.37%

22.99%

18.81 − 27.79%

History of CHF

30.51%

24.61 − 37.12%

25.77%

21.08 − 31.09%

24.93%

20.68 − 29.73%

33.06%

28.42 − 38.05%

27.16%

22.68 − 32.16%

Cardiogenic shock

1.27%

0.40 − 3.93%

3.44%

1.88 − 6.21%

1.15%

0.45 − 2.91%

2.75%

1.50 − 4.99%

2.69%

1.42 − 5.03%

Prior CTS intervention

6.78%

4.07 − 11.08%

13.40%

9.96 − 17.79%

15.47%

12.05 − 19.64%

23.42%

19.36 − 28.04%

20.30%

16.34 − 24.93%

Category of surgery

236

291

349

363

335

CABG

60.17%

53.81 − 66.20%

58.42%

52.68 − 63.94%

49.86%

44.64 − 55.08%

34.44%

29.74 − 39.47%

31.94%

27.18 − 37.11%

Valve

22.03%

17.21 − 27.74%

25.09%

20.46 − 30.37%

34.96%

30.15 − 40.10%

55.10%

49.96 − 60.14%

54.93%

49.58 − 60.17%

CABG + Valve

7.63%

4.88 − 11.74%

10.31%

7.32 − 14.34%

8.88%

6.33 − 12.33%

8.54%

6.08 − 11.87%

8.06%

5.60 − 11.47%

Other

10.17%

6.93 − 14.69%

6.19%

3.95 − 9.57%

6.30%

4.20 − 9.36%

1.93%

0.94 − 3.93%

5.07%

3.19 − 7.97%

Death*

1.89%

0.13 − 8.62%

2.92%

0.61 − 9.09%

2.84%

0.94 − 6.93%

1.67%

0.30 − 5.67%

2.06%

0.26 − 7.82%

Rerturn to theatre*

4.07%

1.05 − 10.10%

10.82%

3.87 − 20.49%

8.45%

3.37 − 16.59%

6.31%

2.69 − 12.24%

9.29%

5.49 − 15.79%

CPB time (min)

86.50

73–125

91.50

74–132

83.50

63–129

90.50

70–133

92.00

69–134

LOS > 14 (days)

5.50

4–10

5.00

4–9

5.00

4–8

5.50

4–8

6.00

2–9