Brunsdon, DanBiesty, LindaBrocklehurst, PeterBrueton, ValerieDevane, DeclanElliott, JimGalvin, SandraGamble, CarrolGardner, HeidiHealy, PatriciaHood, KerenzaJordan, JoanLanz, DorisMaeso, BeccyRoberts, AmandaSkene, ImogenSoulsby, IreneStewart, DerekTorgerson, DavidTreweek, ShaunWhiting, CarolineWren, SharonWorrall, AndrewGillies, Katie2020-01-232020-01-232019-10-15Brunsdon, D, Biesty, L, Brocklehurst, P, Brueton, V, Devane, D, Elliott, J, Galvin, S, Gamble, C, Gardner, H, Healy, P, Hood, K, Jordan, J, Lanz, D, Maeso, B, Roberts, A, Skene, I, Soulsby, I, Stewart, D, Torgerson, D, Treweek, S, Whiting, C, Wren, S, Worrall, A & Gillies, K 2019, 'What are the most important unanswered research questions in trial retention? A James Lind Alliance Priority Setting Partnership : The PRioRiTy II (Prioritising Retention in Randomised Trials) study', Trials, vol. 20, 593. https://doi.org/10.1186/s13063-019-3687-71745-6215ORCID: /0000-0001-7890-2854/work/79060619ORCID: /0000-0002-2796-6898/work/118192880ORCID: /0000-0002-7239-7241/work/186968497https://hdl.handle.net/2164/13579Acknowledgements The authors would like to thank all stakeholders who took part, all respondents to the initial and interim surveys, and the attendees at the consensus meeting. We would also like to thank staff members at the HSRU who screened abstracts, and specifically Jane Brady and Beverly Smith for their insurmountable work. We would also like to thank Katherine Cowan from the JLA for her work as the lead facilitator at the consensus meeting. The data sets generated and/or analysed during the current study are not publicly available due to privacy protections but are available from the corresponding author on reasonable request. The full results of this study are available at www.priorityresearch.ie.942864engJames Lind AllianceParticipant retentionParticipation in randomised trialsPatient and public involvementPriority Setting PartnershipRetention challengesTrials methodologyCLINICIANR Medicine (General)Pharmacology (medical)Medicine (miscellaneous)R1What are the most important unanswered research questions in trial retention? A James Lind Alliance Priority Setting Partnership : The PRioRiTy II (Prioritising Retention in Randomised Trials) studyJournal article10.1186/s13063-019-3687-7http://www.scopus.com/inward/record.url?scp=85073473062&partnerID=8YFLogxK20