Post-marketing research and its outcome for novel anticancer agents approved by both the FDA and EMA between 2005 and 2010: A cross-sectional study.
Post-marketing research in oncology has rarely been described. We aimed to characterize post-marketing trials for a consistent set of anticancer agents over a long period. We performed a cross-sectional analysis of post-marketing trials registered at ClinicalTrials.gov through September 2014 for novel anticancer agents approved by both the US Food and Drug Administration and the European Medicines Agency between 2005 and 2010. All relevant post-marketing trials were classified according to indication, primary outcome, starting date, sponsors, and planned enrollment. Supplemental indications were retrieved from regulatory documents and publication rate was assessed by two different methods. Ten novel anticancer agents were eligible: five were indicated for hematologic malignancies and the remaining five for solid cancers (three for kidney cancer). We identified 2,345 post-marketing trials; 1,362 (58.1%) targeted an indication other than the originally approved one. We observed extreme variations among drugs in both number of post-marketing trials (range 8-530) and overall population to be enrolled per trial (1-8,381). Post-marketing trials assessed almost all types of cancers, the three most frequently studied cancers being leukemia, kidney cancer and myeloma. In all, 6.6% of post-marketing trials had a clinical endpoint as a primary outcome, and 35.9% and 54.1% had a safety or surrogate endpoint, respectively, as a primary outcome. Nine drugs obtained approval for supplemental indications. The publication rate at 10 years was 12.3 to 26.1% depending on the analysis method. In conclusion, we found that post-marketing research in oncology is highly heterogeneous and the publication rate of launched trials is low.
['Zeitoun|Jean-David|JD|0000-0001-9590-3461', 'Baron|Gabriel|G|', 'Vivot|Alexandre|A|', 'Atal|Ignacio|I|', 'Downing|Nicholas S|NS|', 'Ross|Joseph S|JS|', 'Ravaud|Philippe|P|']
D000970:Antineoplastic Agents D002986:Clinical Trials as Topic D003430:Cross-Sectional Studies D017277:Drug Approval D017723:Drug Utilization Review D005062:European Union D006077:Government Agencies D006801:Humans D040541:Marketing D009369:Neoplasms D017063:Outcome Assessment, Health Care D012107:Research Design D014481:United States D014486:United States Food and Drug Administration
outcome anticancer agents post-marketing trials publication rate