title: Bare-metal stent outcomes in an unselected patient population.
abstract: BACKGROUND
  Randomized trials have shown that drug-eluting stents (DES) substantially reduce in-stent restenosis compared with bare-metal stents (BMS).
  
  
  OBJECTIVE
  Revascularization event rates related to BMS restenosis may be higher in the trials setting than in real-world experience, calling into question the extent of benefit possible with widespread DES use in regular practice.
  
  
  METHODS
  Between December 1998 and March 2003, 17,102 patients with BMS registered in the Goodroe Healthcare Solutions Data Warehouse met the inclusion criteria for this retrospective study of catheterization laboratory data. We examined the database for evidence of diagnostic angiography or percutaneous coronary intervention (PCI) readmission within 1 year after stenting.
  
  
  RESULTS
  Repeat PCI was documented for 2070 patients, and 232 were referred for coronary artery bypass graft surgery (CABG)-in sum, 13.5% of the cohort. Stented region revascularization was observed in 8.4%: 1350 patients underwent subsequent PCI, and 84 of the patients referred for CABG had in-stent lesion recurrence. Only 1207 (7.1%) patients required stent-related PCI after 30 days, the time frame consistent with restenosis.
  
  
  CONCLUSIONS
  In this "real-world" series, reintervention of a stented region after the first follow-up month was documented in fewer than 8% of patients in a large cohort that had received BMS. The rate of clinical events potentially related to BMS in-stent restenosis in this large, unselected patient population is substantially lower than that in the control arms of some DES trials. The incremental benefit of widespread conversion from BMS to DES may be smaller in some patient populations than is suggested by the results of those trials.
authors.affiliation: Center for Primary Care and Outcomes Research, Stanford University School of Medicine, Stanford, California 94305-6019, USA. Cynthia.Yock@stanford.edu
authors.forename: A
authors.initials: A
authors.lastname: Yock
authors.forename: J Michael
authors.initials: JM
authors.lastname: Isbill
authors.forename: Spencer B
authors.initials: SB
authors.lastname: King
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D006328:Cardiac Catheterization; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D023903:Coronary Restenosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019233:Retreatment; D012189:Retrospective Studies; D015607:Stents; D016896:Treatment Outcome