title: Age-dependent effect of abciximab in patients with acute coronary syndromes treated with percutaneous coronary interventions.
abstract: BACKGROUND
  No studies have specifically performed an age-based analysis of the efficacy of abciximab in patients with non-ST-segment elevation acute coronary syndromes undergoing percutaneous coronary intervention (PCI). The aim of the study was to assess whether there are age-dependent differences in the clinical benefit of abciximab in patients with acute coronary syndrome treated with PCI.
  
  
  RESULTS
  We performed this retrospective analysis of 2022 patients with acute coronary syndrome enrolled in the Intracoronary Stenting and Antithrombotic Regimen: Rapid Early Action for Coronary Treatment (ISAR-REACT 2) study and randomized to receive abciximab or placebo during a PCI procedure. The incidence of major adverse cardiac events (MACE) during the 30 days after PCI was the primary end point of the study. On the basis of the cutoff age value provided by logistic regression in connection with bootstrap resampling, patients were divided into those younger (n=1220) and older (n=802) than 70 years. Among younger patients, the incidence of MACE was 7.7% in the abciximab group versus 13.3% in the placebo group (relative risk 0.57, 95% confidence interval 0.40 to 0.80, P=0.001). In contrast, no difference was observed among older patients: The incidence of MACE was 10.9% in the abciximab group versus 9.9% in the placebo group (relative risk 1.10, 95% confidence interval 0.72 to 1.69, P=0.65). After adjustment for other variables, including cardiac troponin, there was a significant interaction between age and abciximab (P=0.04) with respect to MACE reduction, with abciximab being more effective in younger patients.
  
  
  CONCLUSIONS
  In patients with non-ST-elevation acute coronary syndromes undergoing PCI, the efficacy of abciximab appears to be age-dependent, with greater benefit among younger patients.
authors.affiliation: Deutsches Herzzentrum, Technische Universität, Lazarettstrasse 36, 80636 München, Germany.
authors.forename: Gjin
authors.initials: G
authors.lastname: Ndrepepa
authors.forename: Adnan
authors.initials: A
authors.lastname: Kastrati
authors.forename: Julinda
authors.initials: J
authors.lastname: Mehilli
authors.forename: Franz-Josef
authors.initials: FJ
authors.lastname: Neumann
authors.forename: Jurriën
authors.initials: J
authors.lastname: ten Berg
authors.forename: Olga
authors.initials: O
authors.lastname: Bruskina
authors.forename: Franz
authors.initials: F
authors.lastname: Dotzer
authors.forename: Melchior
authors.initials: M
authors.lastname: Seyfarth
authors.forename: Jürgen
authors.initials: J
authors.lastname: Pache
authors.forename: Josef
authors.initials: J
authors.lastname: Dirschinger
authors.forename: Kurt
authors.initials: K
authors.lastname: Ulm
authors.forename: Peter B
authors.initials: PB
authors.lastname: Berger
authors.forename: Albert
authors.initials: A
authors.lastname: Schömig
mesh_terms: D000077284:Abciximab; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000188:drug therapy* / Q000401:mortality / Q000503:physiopathology / Q000601:surgery; D012189:Retrospective Studies
chemical_list: D000911:Antibodies, Monoclonal; D007140:Immunoglobulin Fab Fragments; D000077284:Abciximab