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Table 1 Prevalence of preoperative risk factors

From: Risk factors for mediastinitis after cardiac surgery – a retrospective analysis of 1700 patients

Variable

Mediastinitis (n)

Σ (n)

p

 

No

Yes

  

Age (years)

64.1 ± 10.2

66.5 ± 8.73

1700

0.71

Gender

    

Male

1175

37

1212

n.s.

Female

479

8

487

 

Body mass index (kg/m2)

28.0

29.8

1700

0.008

Hypertension

    

No

273

7

280

n.s.

Yes

1381

38

1419

 

Diabetes mellitus

    

No

1086

23

1109

0.05

Yes

568

22

590

 

Active Smoking

    

No

858

15

873

n.s.

Yes

295

11

306

 

COPD

    

No

1507

35

1542

0.006

Yes

147

10

157

 

Peripheral vascular disease

    

No

1465

39

1504

n.s.

Yes, untreated

132

3

135

 

Yes, treated

56

3

59

 

Ejection fraction (% ± SD)

59.6 ± 15.8

58.7 ± 15.0

1700

n.s.

Previous cardiac surgery

    

No

1607

45

1652

n.s.

Yes

47

0

47

 

NYHA class

    

I

113

3

116

n.s.

II

882

19

901

 

III

566

20

586

 

IV

55

2

57

 

CCS class

    

I

100

0

100

0.02

II

725

15

740

 

III

686

23

709

 

IV

104

7

111

 

Renal insufficiency

    

No

1318

30

1348

n.s.

Yes, compensated

309

14

323

 

Yes, dialysis

16

1

17

 

Status post renal transplantation

4

0

4

 

Hemoglobin (mmol/l ± SD)

8.6 ± 1.1

8.4 ± 1.2

1697

n.s.

Creatinine (μmol/l ± SD)

96.7 ± 64.9

109.1 ± 58.7

1690

n.s.

Blood urea nitrogen (mmol/l ± SD)

6.8 ± 3.2

7.5 ± 4.4

1672

n.s.

Surgical technique

    

cardiopulmonary bypass

1276

32

1308

n.s.

OPCAB

276

9

285

 

PACAB

18

0

18

 

MIDCAB

84

4

88

 

Number of bypasses (n ± SD)

2.6 ± 1.2

2.7 ± 1.1

1699

n.s.

Use of LIMA

    

No

479

9

488

n.s.

Yes

1175

36

1211

 

Bilateral IMA use

    

No

1587

40

 

0.02

Yes

67

5

  

Total arterial revascularization

    

No

1276

31

1307

n.s.

Yes

378

14

392

 
  1. Prevalence of preoperative risk factor among the study population. Data are shown either as absolute numbers or as mean ± SD. Besides several demographic data, there are also variables describing clinical conditions and surgical technique.