Independent but coordinated trials: Insights from the practice-based opportunities for weight reduction trials collaborative research group

Hsin Chieh Yeh, Jeanne M. Clark, Karen E. Emmons, Reneé H. Moore, Gary G. Bennett, Erica T. Warner, David B. Sarwer, Gerald J. Jerome, Edgar R. Miller, Sheri Volger, Thomas A. Louis, Barbara Wells, Thomas A. Wadden, Graham A. Colditz, Lawrence J. Appel

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Background The National Heart, Lung, and Blood Institute (NHLBI) funded three institutions to conduct effectiveness trials of weight loss interventions in primary care settings. Unlike traditional multi-center clinical trials, each study was established as an independent trial with a distinct protocol. Still, efforts were made to coordinate and standardize several aspects of the trials. The three trials formed a collaborative group, the Practice-based Opportunities for Weight Reduction (POWER) Trials Collaborative Research Group. Purpose We describe the common and distinct features of the three trials, the key characteristics of the collaborative group, and the lessons learned from this novel organizational approach. Methods The Collaborative Research Group consists of three individual studies: Be Fit, Be Well (Washington University in St. Louis/Harvard University), POWER Hopkins (Johns Hopkins), and POWER-UP (University of Pennsylvania). There are a total of 15 participating clinics with ∼1100 participants. The common primary outcome is change in weight at 24 months of follow-up, but each protocol has trial-specific elements including different interventions and different secondary outcomes. A Resource Coordinating Unit at Johns Hopkins provides administrative support. Results The Collaborative Research Group established common components to facilitate potential cross-site comparisons. The main advantage of this approach is to develop and evaluate several interventions, when there is insufficient evidence to test one or two approaches, as would be done in a traditional multi-center trial. Limitations The challenges of the organizational design include the complex decision-making process, the extent of potential data pooling, time intensive efforts to standardize reports, and the additional responsibilities of the DSMB to monitor three distinct protocols.

Original languageEnglish (US)
Pages (from-to)322-332
Number of pages11
JournalClinical Trials
Issue number4
StatePublished - Aug 2010


  • 7: 322-332.
  • Conclusions The POWER Trials Collaborative Research Group is a case study of an alternative organizational model to conduct independent
  • especially given the interest in comparative effectiveness research. Nevertheless
  • the ultimate utility of this model will not be fully understood until the trials are completed. Clinical Trials 2010
  • yet coordinated trials. Such a model is increasingly being used in NHLBI supported trials

ASJC Scopus subject areas

  • Pharmacology


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