title: Outcome of coronary artery bypass grafting in patients without major risk factors and patients with at least one major risk factor for coronary artery disease.
abstract: BACKGROUND
  Coronary artery bypass grafting (CABG) has become a safer procedure in recent years.
  
  
  OBJECTIVE
  We aimed to compare complications and early outcome of CABG in patients without history of general risk factors with those in patients with at least one general risk factor for coronary artery disease (CAD).
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Postoperative in-hospital complications, 30-day mortality rate and length of stay in hospital of 708 patients without preoperative general risk factors undergoing CABG in three university hospitals were assessed and compared with 10,844 patients undergoing CABG with at least one general risk factor as controls. In addition, the association of the studied variables with patients' early outcome was evaluated.
  
  
  METHODS
  SPSS software with Pearson's chi2 test; independent sample t test, Mann-Whitney test and univariate analysis were used.
  
  
  RESULTS
  All studied in-hospital complications were similar between the two groups. Thirty days mortality rate (0.7% in study group and 1.4% in control group) was similar between groups, whereas prolonged length of stay (>12 days) was more frequent in control group (61.33% vs. 71.36%, P<0.0001). Atrial fibrillation (P<0.0001) was a strong predictor for prolonged length of stay in hospital.
  
  
  CONCLUSIONS
  Most aspects of early complications after CABG, as well as 30-day mortality rate, were similar between patients with and without general risk factors for coronary artery disease undergoing CABG.
authors.affiliation: Department of Epidemiology, Medical Sciences/ University of Tehran, Tehran, Iran.
authors.forename: Younes
authors.initials: Y
authors.lastname: Nozari
authors.forename: Ali
authors.initials: A
authors.lastname: Hashemlu
authors.forename: Zinat Nadia
authors.initials: ZN
authors.lastname: Hatmi
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Sheikhvatan
authors.forename: Amir
authors.initials: A
authors.lastname: Iravani
authors.forename: Ali
authors.initials: A
authors.lastname: Bazdar
authors.forename: Nasir
authors.initials: N
authors.lastname: Babakhan
authors.forename: Nazanin Gholami
authors.initials: NG
authors.lastname: Ghasri
mesh_terms: D001281:Atrial Fibrillation; D016022:Case-Control Studies; D001026:Coronary Artery Bypass; D003324:Coronary Artery Disease / Q000401:mortality / Q000601:surgery*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007492:Iran; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011379:Prognosis; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome