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This guidance is designed to help UK-based Chief Investigators (CIs) of surgical trials to plan effective PPI to enhance the recruitment and retention of trial participants. The core guidance is only 4 pages long, with additional appendices and external hyperlinks for further information.

The guidance is based on the findings of PIRRIST, a four-stage research project funded by the NIHR Oxford Biomedical Research Centre and the MRC Network of Hubs for Trials Methodology Research.

The guidance is freely accessible to anyone via the hyperlink below. However, we would be very grateful if you could first enter your email address in the box below (this is optional), if you are happy for us to contact you in future to find out whether you used the guidance and what you thought of it? This will be an important part of evaluation. We won’t use your email address for any other purpose.

> Download PDF guidance document

If you have any queries or comments about the guidance please contact

Please cite this guidance document as:

PIRRIST Study Team (2019). “Planning patient and public involvement in surgical trials.” Available from the University of Oxford:


We would like to thank all PIRRIST collaborators and advisers and participants for their valuable contribution to this research project. We are also grateful to all those who commented on an early version of the guidance, including Katie Banister, Matt Costa, Jeremy Dearling, Jeremy Fairbank, Jacqui Gath, Gary Hickey, Debby Lennard, Lynne Maddocks, Sinduja Manohar, Alison McDonald, Mary Nettle, Rachel O’Donnell and Judith Wardle.

Thank you for your interest.

> See University policies on how we use your data

> Return to PIRRIST webpages