Characteristics

(n = 526)

Group A (n = 418)

Percent

Group B

(n = 108)

Percent

p value

Mean age

45.3

72.7

Male

322

77%

78

72%

0.99

Female

96

23%

30

28%

0.99

VATS

207

49.5%

53

49%

0.99

Open

211

50.5%

55

51%

0.99

Empyema stage II

145

34.6%

34

31.4%

0.99

Empyema stage III

273

65.4%

74

68.6%

0.99

Myocardial infarct

9

2.1%

5

4.6%

0.25

Asthma

133

32%

25

23%

0.09

COPD

17

4%

5

4.6%

0.99

Renal failure

7

1.6%

4

3.7%

0.24

History of TIA

2

0.4%

3

2.7%

0.06

Smoking history

257

61%

54

50%

0.03