Low risk

Intermediate risk

High risk

p

Age (years)

55.8

67.9

75.6

<0.00001

Gender (% male)

76%

57%

46%

<0.00001

COPD (% yes)

6.9%

15.6%

25.6%

<0.00001

Extra-cardiac arteriopathy (% yes)

1.0%

2.8%

16.4%

<0.00001

Neurological dysfunction (% yes)

4.7%

8.4%

12.6%

<0.00001

Previous cardiac surgery (% yes)

0%

2.6%

15.8%

<0.00001

Creatinine > 200 µg (% yes)

0%

1.2%

4.5%

Low = Inter (0.06)

Inter < High (0.0002)

Low < High (<0.00001)

LV function (% good, moderate, poor)

94%

6%

0%

87%

11%

2%

75%

18%

7%

<0.00001

Recent MI (% yes)

0.8%

6.1%

13.5%

<0.00001

Emergency surgery (% elective, urgent, emergency, salvage)

91%

9%

0%

0%

89%

10%

1%

0%

79%

18%

3%

0%

Low = Inter (0.1467)

Inter < High (<0.00001)

Low < High (<0.00001)