Designing better trials: what do we need to do to improve trial retention?
Brighton, UK

Speaker: Shaun Treweek

A talk at the 2019 annual NHS R&D Forum (

Randomised trials are essential in high quality, evidence-based healthcare systems but they are hard work.  One reason for this work is poor retention: people who sign-up to take part but don’t complete the trial and don’t provide all or some data.  As far as the trial is concerned, no data means the participant may as well have not taken part.  This session will highlight the problems poor retention leads to, including how it makes recruitment harder, and will present new ideas for prioritised trial methodology research that is underway or needed to improve retention.

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