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Early Phase Prevention Trials Consortia

Step 2: Conducting a Cancer Prevention Clinical Trial

Retention and Adherence


Keeping clinical trial participants interested, participating, and committed to a study is the goal of retention efforts. These activities promote maximum adherence to the study design throughout the course of a clinical trial. Maintaining adherence and retention, however, is especially challenging for long-term cancer prevention trials.

Generally, recruitment and adherence efforts:

  • Begin during the initial interaction with a potential participant, not after randomization; and
  • Occur on an ongoing basic in a dynamic process, which requires promoting and routinely evaluating adherence and retention methods.

DCP's retention and adherence manual template (pdf, 32kb) describes typical factors that can lead to non-adherence, along with established strategies to maintain study participants' interest.