Table 3 Subgroup analysis of Charlson Comorbidity Index

COPD

8/61

4/6

p = 0.0401*

Nothing

18/51

0/10

p = 0.1056

Myocard Infarction

8/61

3/7

p = 0.1397

Peripheral Vascular Disease

10/59

0/10

p = 0.3455

Diabetes without complications

17/52

4/6

p = 0.4430

Solid Tumor without metastases

5/64

1/9

p = 0.5687

Moderate/severe Kidney Failure

13/56

1/9

p = 0.6812

Cerebrovascular Disease

3/66

0/10

p > 0.9999

Connective Tissue Disease

0/69

0/10

p > 0.9999

Peptic Ulcer Disease

0/69

0/10

p > 0.9999

Mild Liver Disease

1/68

0/10

p > 0.9999

Dementia

1/68

0/10

p > 0.9999

Diabetes with organ damage

8/61

1/9

p > 0.9999

Hemiplegia

0/69

0/10

p > 0.9999

Leukemia

0/69

0/10

p > 0.9999

Lymphoma

1/68

0/10

p > 0.9999

Moderate/severe Liver Disease

4/65

0/10

p > 0.9999

Solid Tumor with metastases

2/67

0/10

p > 0.9999

AIDS

0/69

0/10

p > 0.9999

Chronic Heart Failure

19/50

2/8

p > 0.9999