title: Impact of preoperative statin therapy on adverse postoperative outcomes in patients undergoing cardiac surgery: a meta-analysis of over 30,000 patients.
abstract: OBJECTIVE
  To determine the strength of evidence for preoperative statin use for prevention of adverse postoperative outcomes in patients undergoing cardiac surgery.
  
  
  RESULTS
  After literature search in major databases, 19 studies were identified [three RCT (randomized prospective clinical trials), 16 observational] that reported outcomes of 31 725 cardiac surgery patients with (n = 17 201; 54%) or without (n = 14 524; 46%) preoperative statin therapy. Outcomes that were analysed included early all-cause mortality (30-day mortality), myocardial infarction (MI), atrial fibrillation (AF), stroke and renal failure. Odds ratio (OR) with 95% confidence intervals (95%CI) were reported using fixed or random effect models and publication bias was assessed. Preoperative statin therapy resulted in a 1.5% absolute risk reduction (2.2 vs. 3.7%; P < 0.0001) and 43% odds reduction for early all-cause mortality (OR 0.57; 95%CI: 0.49-0.67). A significant reduction (P < 0.01) in statin pretreated patients was also observed for AF (24.9 vs. 29.3%; OR 0.67, 95%CI: 0.51-0.88), stroke (2.1 vs. 2.9%, OR 0.74, 95%CI: 0.60-0.91), but not for MI (OR 1.11; 95%CI: 0.93-1.33) or renal failure (OR 0.78, 95%CI: 0.46-1.31). Funnel plot and Egger's regression analysis (P = 0.60) excluded relevant publication bias.
  
  
  CONCLUSIONS
  Our meta-analysis provides evidence that preoperative statin therapy exerts substantial clinical benefit on early postoperative adverse outcomes in cardiac surgery patients, but underscores the need for RCT trials.
authors.affiliation: Department of Cardiothoracic Surgery, Heart Center, University Hospital of Cologne, Kerpener Strasse 62, 50924 Cologne, Germany. oliver.liakopoulos@uk-koeln.de
authors.forename: Oliver J
authors.initials: OJ
authors.lastname: Liakopoulos
authors.forename: Yeong-Hoon
authors.initials: YH
authors.lastname: Choi
authors.forename: Peter L
authors.initials: PL
authors.lastname: Haldenwang
authors.forename: Justus
authors.initials: J
authors.lastname: Strauch
authors.forename: Thorsten
authors.initials: T
authors.lastname: Wittwer
authors.forename: Hilmar
authors.initials: H
authors.lastname: Dörge
authors.forename: Christof
authors.initials: C
authors.lastname: Stamm
authors.forename: Gernot
authors.initials: G
authors.lastname: Wassmer
authors.forename: Thorsten
authors.initials: T
authors.lastname: Wahlers
mesh_terms: D003324:Coronary Artery Disease / Q000601:surgery*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000627:therapeutic use*; D011183:Postoperative Complications / Q000517:prevention & control*; D011184:Postoperative Period; D011292:Premedication; D011300:Preoperative Care; D011446:Prospective Studies; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome
chemical_list: D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors