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Table 4 Preoperative dichotomous variables

From: A comparative analysis of predictive models of morbidity in intensive care unit after cardiac surgery – Part II: an illustrative example

Acronym

Description

Training set

Testing set

  

N

%

N

%

Gender

Sex (female)

141

25.9

133

24.4

COPD

Chronic obstructive pulmonary disease

51

9.4

46

8.4

PAH

Pulmonary artery hypertension

10

1.8

17

3.1

Arrhy

Arrhythmia

77

14.1

81

14.9

CHF

Congestive heart failure

24

4.4

31

5.7

PVD

Peripheral vascular disease

122

22.4

98

18.0

TIA

Transient ischemic attacks

34

6.2

21

3.9

PVS

Previous vascular surgery

49

9.0

42

7.7

LMSS

Left main stem stenosis

343

62.9

332

60.9

Endoc

Endocarditis

1

0.2

2

0.4

Pre-IABP

Intra aortic balloon pump

14

2.6

13

2.4

AMI-1m

Acute myocardial infarction within a month

124

22.8

114

20.9

Diab

Diabetes

104

19.1

94

17.2

REDO-1

One previous heart operation

10

1.8

19

3.5

REDO-2

Two previous heart operations

2

0.4

0

0.0

LVEF-35%

Left ventricular ejection fraction < 35%

52

9.5

47

8.6

EM

Emergency

42

7.7

51

9.4