title: Risk factors for prolonged hospital stay after isolated coronary artery bypass grafting.
abstract: BACKGROUND
  Characteristics of the patient and the coronary artery bypass grafting may predispose individuals to prolonged hospitalization, increasing costs and morbidity and mortality.
  
  
  OBJECTIVE
  The objective of this study was to evaluate individual and perioperative risk factors of prolonged hospitalization in intensive care units and wards.
  
  
  METHODS
  We conducted a case-control study of 104 patients undergoing isolated coronary artery bypass grafting with cardiopulmonary bypass. Patients hospitalized >3 days in the intensive care unit or >7 days in the ward were considered for the study. The association between variables was estimated by the chi-square test, odds ratio and logistic regression; P <0.05 was considered statistically significant.
  
  
  RESULTS
  Hospital stay >3 days in the intensive care unit occurred for 22.1% of patients and >7 days in the ward for 27.9%. Among preoperative factors, diabetes (OR=3.17) and smoking (OR=4.07) were predictors of prolonged intensive care unit stay. Combining the pre-, intra-and postoperative variables, only mechanical ventilation for more than 24 hours (OR=6.10) was predictive of intensive care unit outcome. For the ward outcome, the preoperative predictor was left ventricular ejection fraction <50% (OR=3.04). Combining pre- and intraoperative factors, diabetes (OR=2.81), and including postoperative factors, presence of infection (OR=4.54) were predictors of prolonged hospitalization in the ward.
  
  
  CONCLUSIONS
  Diabetes and smoking were predictors of intensive care unit outcome, and ejection fraction <50% of ward outcome. For the set of perioperative factors, prolonged hospitalization after isolated coronary artery bypass grafting was associated with mechanical ventilation >24 hours for the intensive care unit and presence of infection for the ward.
authors.forename: Elayne Kelen de
authors.initials: EK
authors.lastname: Oliveira
authors.forename: Aída Luiza Ribeiro
authors.initials: AL
authors.lastname: Turquetto
authors.forename: Pedro Luiz
authors.initials: PL
authors.lastname: Tauil
authors.forename: Luiz Fernando
authors.initials: LF
authors.lastname: Junqueira
authors.forename: Luiz Guilherme Grossi
authors.initials: LG
authors.lastname: Porto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002315:Cardiopulmonary Bypass; D016022:Case-Control Studies; D001026:Coronary Artery Bypass / Q000706:statistics & numerical data*; D048909:Diabetes Complications; D005260:Female; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data; D007431:Intraoperative Complications / Q000209:etiology*; D007902:Length of Stay / Q000706:statistics & numerical data*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D059035:Perioperative Period; D011237:Predictive Value of Tests; D012121:Respiration, Artificial; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D018709:Statistics, Nonparametric; D013997:Time Factors