title: The clinical evaluation committee in a large multicenter phase 3 trial of drotrecogin alfa (activated) in patients with severe sepsis (PROWESS): role, methodology, and results.
abstract: OBJECTIVE
  In the multinational PROWESS trial, drotrecogin alfa (activated) significantly reduced mortality rate in patients with severe sepsis compared with placebo. The use of large multiple-center trials can potentially complicate interpretation of results in severe sepsis populations because of variability in medical attitudes and practices and the frequency of confounding events such as protocol violations. The objective of this study was to perform a blinded, critical, integrated review of data from the 1,690 severe sepsis patients from 164 medical centers enrolled in the PROWESS trial using a Clinical Evaluation Committee.
  
  
  METHODS
  Blinded, critical, integrated review of data.
  
  
  METHODS
  Participating sites.
  
  
  METHODS
  The 1,690 severe sepsis patients from 164 medical centers enrolled in the PROWESS trial.
  
  
  METHODS
  We performed analyses of the optimal cohort, defined as patients who had full compliance with the protocol, had evidence of an infection, and received adequate anti-infective therapy. We also performed other analyses, including significant underlying disorders, life support measures, and causes of death.
  
  
  RESULTS
  The optimal cohort of 81.4% of the intention-to-treat population [drotrecogin alfa (activated), n = 695; placebo, n = 680] had similar baseline severity of illness between the two groups, a similar pharmacodynamic effect, and a relative risk of death estimate consistent with that observed in the overall PROWESS trial (0.83, 95% confidence interval 0.69-0.99 vs. 0.806, 95% confidence interval 0.69-0.94). A beneficial effect of drotrecogin alfa (activated) similarly was observed in patients with significant underlying disorders (0.73, 95% confidence interval 0.57-0.93) who were more severely ill and had a higher percentage of patients forgoing life-sustaining therapy. In contrast with the original investigator determinations, a benefit associated with drotrecogin alfa (activated) treatment in urinary tract infection adjudicated by the Clinical Evaluation Committee was observed.
  
  
  CONCLUSIONS
  The survival benefit associated with drotrecogin alfa (activated) use was consistent with the results of the overall trial regardless of whether patients met criteria of the optimal cohort or had a significant underlying disorder.
mesh_terms: D018806:APACHE; D000890:Anti-Infective Agents / Q000008:administration & dosage*; D016470:Bacteremia / Q000188:drug therapy* / Q000382:microbiology / Q000401:mortality; D016001:Confidence Intervals; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D005260:Female; D005500:Follow-Up Studies; D016905:Gram-Negative Bacterial Infections / Q000175:diagnosis / Q000188:drug therapy* / Q000401:mortality; D016908:Gram-Positive Bacterial Infections / Q000175:diagnosis / Q000188:drug therapy* / Q000401:mortality; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D011336:Probability; D011486:Protein C / Q000008:administration & dosage*; D011994:Recombinant Proteins / Q000008:administration & dosage*; D018570:Risk Assessment; D012720:Severity of Illness Index; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D000890:Anti-Infective Agents; D011486:Protein C; D011994:Recombinant Proteins; C421124:drotrecogin alfa activated