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Table 1 Dichotomous variables entered in the score model

From: A bootstrap approach for assessing the uncertainty of outcome probabilities when using a scoring system

Acronym Description Training N (%) Testing N (%)
O2ER O2 extraction ratio ≥40% 116 (21.3%) 129 (23.7%)
Card-ID Cardiac inotropic drugs 74 (13.6%) 69 (12.7%)
PVD Peripheral vascular disease 116 (21.3%) 104 (19.1%)
EM Emergency 45 (8.3%) 48 (8.8%)
VCO2 CO2 production <180 ml/min 256 (47.0%) 261 (47.9%)
CPBt Cardio-pulmonary bypass time ≥2 hours 223 (40.9%) 203 (37.2%)
AD Anti-arrhythmic drugs 29 (5.3%) 27 (5.0%)
IABP Intra aortic balloon pump 11 (2.0%) 10 (1.8%)
MVR Mitral valve replaced with artificial valve 8 (1.5%) 12 (2.2%)
CHF Congestive heart failure 25 (4.6%) 30 (5.5%)
MR Mitral valve repaired surgically 12 (2.2%) 8 (1.5%)
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