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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