Table 3 Characteristics of the patients with MRSA infection and MRSA colonization

Number of patients

420

758

Age, median (IQR), years

68 (49, 76)

61 (1, 75)

0.0002

Male sex, n (%)

262 (64.0%)

467 (63.0%)

n.s.

Categories of summation of the Charlson Comorbidity Index

0, indicating low

131 (31.0%)

263 (35.0%)

n.s.

1 or 2, indicating medium

166 (40.0%)

329 (43.0%)

n.s.

3 or 4, indicating high

95 (23.0%)

125 (16.0%)

0.01

≥ 5, indicating very high

28 (6.7%)

41 (5.4%)

n.s.

Charlson Comorbidity Index

C1_Myocardial infarction

4 (1.0%)

16 (2.1%)

n.s.

C2_Congestive heart failure

50 (12.0%)

104 (14.0%)

n.s.

C3_Peripheral vascular disease

52 (12.0%)

54 (7.1%)

0.004

C4_Cerebrovascular disease

17 (4.0%)

60 (7.9%)

0.01

C5_Dementia

7 (1.7%)

17 (2.2%)

n.s.

C6_Chronic pulmonary disease

21 (5.0%)

37 (4.9%)

n.s.

C7_Rheumatic disease

11 (2.6%)

14 (1.8%)

n.s.

C8_Peptic ulcer disease

16 (3.8%)

32 (4.2%)

n.s.

C9_Mild liver disease

19 (4.5%)

22 (2.9%)

n.s.

C10_Diabetes without chronic complication

57 (14.0%)

81 (11.0%)

n.s.

C11_Hemiplegia or paraplegia

2 (0.5%)

3 (0.4%)

n.s.

C12_Renal disease

52 (12.0%)

51 (6.7%)

0.002

C13_Diabetes with chronic complication

21 (5.0%)

21 (2.8%)

0.07

C14_Malignancy

121 (29.0%)

215 (28.0%)

n.s.

C15_Leukemia

6 (1.4%)

10 (1.3%)

n.s.

C16_Lymphoma

4 (1.0%)

9 (1.2%)

n.s.

C17_Moderate or severe liver disease

4 (1.0%)

6 (0.8%)

n.s.

C18_Metastatic solid tumor

16 (3.8%)

26 (3.4%)

n.s.

C19_AIDS/HIV

0 (0%)

1 (0.1%)

n.s.

ICU admission

210 (50.0%)

394 (52.0%)

n.s.

Mechanical ventilation

143 (34.0%)

287 (38.0%)

n.s.

HD or HF

43 (10.0%)

46 (6.1%)

0.01

In-hospital mortality

46 (11.0%)

52 (6.9%)

0.02

Length of stay, median (IQR), days

43 (24, 77)

27 (14, 52)

< 0.00001

Hospital charges, median (IQR), US dollars

$ 24,733 (11,136,　56,484)

$ 15,952 (6,880,　35,603)

< 0.00001