Table 2 Baseline characteristics of patients in the low MIC group vs. the high MIC group

Median age [range]

64 [18–89]

55 [18–99]

0.35*

 Race

  White

15

51.7

89

36.2

0.14*

  Black

11

37.9

141

57.3

  Asian

1

3.5

4

1.6

  Other/unknown

2

6.9

12

4.9

 Co-morbidity

  Median Charlson index [range]

0 [0–2]

0 [0–2]

0.44*

  Having at least one Charlson conditions

8

27.6

54

22.0

0.49

  Acute myocardial infarction

1

3.5

4

1.6

0.43*

  Congestive heart failure

3

10.3

8

3.3

0.10*

  Peripheral vascular disease

0

0.0

6

2.4

0.99*

  Cerebrovascular disease

2

6.9

12

4.9

0.65*

  Dementia

0

0.0

3

1.2

0.99*

  COPD

1

3.5

14

5.7

0.99*

  Rheumatoid disease

0

0.0

1

0.4

0.99*

  Peptic ulcer

0

0.0

1

0.4

0.99*

  Mild liver disease

1

3.5

0

0.0

0.11*

  Moderate/severe liver disease

0

0.0

0

0.0

–

  Diabetes

1

3.5

3

1.2

0.36*

  Hemiplegia or paraplegia

0

0.0

1

0.4

0.99*

  Renal disease

2

6.9

6

2.4

0.20*

  Cancer

1

3.5

12

4.9

0.99*

  Metastatic cancer

0

0.0

7

2.9

0.99*

  AIDS

0

0.0

0

0.0

–