Stakeholders' views on the most and least helpful aspects of the ICH E6 GCP guideline and their aspirations for the revision of ICH E6(R2).

Background: The International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) has published the ICH E6(R2) Good Clinical Practice (GCP) guideline, which provides standards for the design, conduct, documentation, and reporting of clinical trials. Revision to E6(R2) is currently underway, aiming to adapt the guidance to the current regulatory environment. The Clinical Trials Transformation Initiative (CTTI) interviewed stakeholders, gathering their experiences implementing ICH E6 GCP and suggestions for revising the guidance. Methods: We conducted a qualitative descriptive study using in-depth interviews. Participants were purposefully selected to ensure diversity in geography, research role, and type of institution. Participants reflected on their aspirations for the ICH E6 GCP revision and described sections of the guidance that they found most and least helpful. Narratives were analyzed using applied thematic analysis. Results: Many participants found ICH E6 GCP generally clear and helpful. They appreciated that the guidance is globally accepted and serves as a common standard for research worldwide. Participants also noted opportunities for improvement, suggesting that the revised guidance should incorporate flexibility, simplify requirements, and accommodate advances in research conduct. They highlighted areas where language should be updated and concepts clarified and expressed a desire for transparency and inclusiveness in the revision process. Conclusion: Our findings show that many participants view the ICH E6(R2) guidance as helpful overall, although substantial room for improvement remains. We have provided the full report of these findings to ICH in hopes that it will be useful as the E6 GCP guideline is revised.