Step

Variable

Odds ratio (95% CI)

p value

1

History of MI

8.75 (1.68 - 45.53)

0.0001

2

Age 65 or higher

2.20 (1.43 - 3.38)

0.0001

3

Albumin < 3.4 gm/dL

2.01 (1.37 - 2.93)

0.0001

4

Hypertension w/meds

2.14 (1.36 - 3.34)

0.0002

5

History of COPD

2.76 (1.53 - 5.00)

0.001

6

Prothrombin time > 13.5

1.86 (1.23 - 2.81)

0.002

7

Op time > 373 min

1.73 (1.18 - 2.52)

0.005

8

Creatinine > 1.3 mg/dL

2.30 (1.28 - 4.14)

0.004