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Table 1 The whole set of dichotomous preoperative, intraoperative and postoperative variables considered a priori as likely predictors

From: A straightforward approach to designing a scoring system for predicting length-of-stay of cardiac surgery patients

Variable 99% confidence interval of odds ratio
Gender 0.659-1.21
Emergency 1.44-6.57
Urgency 0.970-2.39
Blood hypertension 0.987-1.87
Treated diabetes 0.884-1.70
Acute myocardial infarction 1.57-6.38
Recent myocardial infarction (<7 days) 0.663-2.96
Preoperative intra-aortic balloon pump 2.79-9.63
Tachycardia 0.885-5.47
Cardiogenic shock 3.15-21.85
Cardiac massage 0.988-21.62
Endocarditis 0.394-8.77
Unstable angina 0.729-1.47
Heart failure 1.90-5.25
Chronic dialysis 3.51-36.70
Previous cerebrovascular events 0.998-3.01
Chronic obstructive pulmonary disease 1.07-2.80
Anti-platelet drugs 0.545-0.984
Dicumarole therapy 1.39-4.18
Heparin therapy 0.873-1.57
Thrombolytic therapy 0.125-3.88
Combined cardiovascular surgery 2.19-4.21
Repeated cardiac surgery 1.63-4.68
Aortocoronary bypass 0.712-1.32
Plastic valve prosthesis 1.48-3.14
Valve substitution 1.22-2.72
Plastic surgery for aortic valve 0.241-8.86
Aortic valve substitution 1.06-1.96
Plastic surgery for tricuspid valve 1.50-7.70
Surgical procedure different from isolated coronary artery bypass graft 1.52-2.74
Aortic arch pathology 0.776-4.30
Carotid endarterectomy 0.382-2.55
Addition of blood to cardiopulmonary bypass circuit 1.96-3.59
Use of fresh frozen plasma 2.24-4.11
Significant bleeding (>100 ml) 0.728-1.39
Low postoperative cardiac output 12.3-23.9
  1. The variables in italics were eliminated from the model because their corresponding odds ratios were not significantly different from 1 (p < 0.01).