Newlands, RumanaDuncan, EilidhTreweek, ShaunElliott, JimPresseau, JustinBower, PeterMacLennan, GraemeOgden, MargaretWells, MaryWitham, Miles DYoung, BridgetGillies, Katie2022-04-252022-04-252022-04-08Newlands, R, Duncan, E, Treweek, S, Elliott, J, Presseau, J, Bower, P, MacLennan, G, Ogden, M, Wells, M, Witham, M D, Young, B & Gillies, K 2022, 'The development of theory-informed participant-centred interventions to maximise participant retention in randomised controlled trials', Trials, vol. 23, no. 1, 268. https://doi.org/10.1186/s13063-022-06218-81745-6215PubMedCentral: PMC8994320ORCID: /0000-0001-7890-2854/work/112135054ORCID: /0000-0002-1039-5646/work/112135086ORCID: /0000-0002-1009-9732/work/112135484ORCID: /0000-0003-4563-152X/work/169078790ORCID: /0000-0002-7239-7241/work/186968493https://hdl.handle.net/2164/18481Acknowledgements We would like to thank all of the participants who volunteered their time to contribute to this study. We would also like to thank all of the teams linked to the host trials we worked with to help identify potential participants. Funding This research is funded by the Chief Scientist Office of the Scottish Government’s Health and Social Care Department [HIPS/16/46]. KG held a Medical Research Council UK Methodology Fellowship during the delivery of this project [MR/L01193X/1]. The publication was supported through a Health Research Board Trials Methodology Research Network award. MDW acknowledges support from the NIHR Newcastle Biomedical Research Centre. MW acknowledges support from the NIHR Imperial Biomedical Research Centre (BRC). The Health Services Research Unit, Institute of Applied Health Sciences (University of Aberdeen), is core-funded by the Chief Scientist Office of the Scottish Government Health and Social Care Directorates. The funders had no involvement in study design, collection, analysis and interpretation of data, reporting or the decision to publish.151658471engRetentionClinical trialsIntervention developmentTheoryBehaviourR MedicineChief Scientist Office (CSO)HIPS/16/46Medical Research Council (MRC)MR/L01193X/1Supplementary InformationRJournal article10.1186/s13063-022-06218-8231