title: Recurrent events in meta-analysis of multiple clinical trials.
abstract: OBJECTIVE
  To study the efficacy and safety of drug or therapy with recurrent events in meta-analysis of multiple clinical trials.
  
  
  METHODS
  A nonparametric approach is proposed to estimate the rates of recurrent events for meta-analysis of trials. The method was used in meta-analysis of angiotensin-converting enzyme (ACE) inhibitor clinical trials to analyze the relative rates and the excess rates between ACE inhibitor and placebo treatment groups for endpoints of hospitalizations for CHF, hospitalizations for CHF or cardiac death, and hospitalizations for CHF or any death, respectively.
  
  
  RESULTS
  The estimates of those three endpoints were 69%, 74%, and 76% (P < 0.01). Compared with placebo, ACE inhibitor reduced 30 cases of hospitalizations for CHF per 1000 person-years, or 40 cardiac deaths or hospitalizations for CHF per 1000 person-years (P < 0.01).
  
  
  CONCLUSIONS
  The method was a simple and efficient approach to conduct meta-analysis of clinical trials with recurrent events.
authors.affiliation: Department of Medicine, McMaster University, Hamilton, Ontario, Canada. Robertson wang@yahoo.com
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Flather
authors.forename: S
authors.initials: S
authors.lastname: Yusuf
authors.forename: Y H
authors.initials: YH
authors.lastname: Wang
authors.forename: L X
authors.initials: LX
authors.lastname: Li
authors.forename: Z C
authors.initials: ZC
authors.lastname: Wang
mesh_terms: D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D016757:Death, Sudden, Cardiac; D006333:Heart Failure / Q000188:drug therapy*; D006801:Humans
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors