Goulao, BeatrizDuncan, AnneInnes, KarenRamsay, Craig RKahan, Brennan C2023-05-012023-05-012023-04-29Goulao, B, Duncan, A, Innes, K, Ramsay, C R & Kahan, B C 2023, 'Using re-randomisation designs to increase the efficiency and applicability of retention studies within trials : a case study', Trials, vol. 24, no. 1, pp. 299. https://doi.org/10.1186/s13063-023-07323-y1745-6215ORCID: /0000-0003-4043-7349/work/134240745ORCID: /0000-0001-8512-4368/work/134240960https://hdl.handle.net/2164/20596Acknowledgements We would like to thank the trial teams involved in delivering the Sticker SWAT, including the clinical Chief Investigators of REFLECT (Profs Martin Tickle and Jan Clarkson) and of C-GALL, another NIHR-funded trial testing the same retention intervention, Prof Irfan Ahmed. We thank Prof David French and Prof Marie Johnston for their valuable insights regarding the literature of repeated behaviour change interventions. Funding REFLECT is funded by the NIHR HTA Programme (project number 16/23/01). BG has been supported by the Wellcome Trust Institutional Strategic Support Fund at the University of Aberdeen. The Health Services Research Unit is funded by the Chief Scientist Office of the Scottish Government Health and Social Care Directorates. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. B.C.K. is funded by the UK MRC, grants MC_UU_00004/07 and MC_UU_00004/09.81092496engSDG 3 - Good Health and Well-beingTrialsTrial methodologyRe-randomisationRetentionSWAT (study within a trial)RA0421 Public health. Hygiene. Preventive MedicineMedical Research Council (MRC)MC_UU_00004/07MC_UU_00004/09Wellcome TrustOther16/23/01RA0421Journal article10.1186/s13063-023-07323-y241