Lawrie, LouisaDuncan, EilidhDunsmore, JenniferNewlands, RumanaGillies, Kate2021-04-092021-04-092021-04-08Lawrie, L, Duncan, E, Dunsmore, J, Newlands, R & Gillies, K 2021, 'Using a behavioural approach to explore the factors that affect questionnaire return within a clinical trial : a qualitative study based on the Theoretical Domains Framework', BMJ Open, vol. 11, no. 4, e048128. https://doi.org/10.1136/bmjopen-2020-0481282044-6055ORCID: http://orcid.org/0000-0002-9867-2184ORCID: /0000-0002-1009-9732/work/93483122ORCID: /0000-0001-7890-2854/work/93483260ORCID: /0000-0003-4563-152X/work/169078784ORCID: /0000-0002-6892-0247/work/194700670https://hdl.handle.net/2164/16212Funding 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 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. in a recent paper. Acknowledgements The authors would like to thank the patients for volunteering their time to participate in this study and to Rebecca Bruce and Karen Innes for facilitating recruitment.8629337engR MedicineChief Scientist Office (CSO)HIPS/16/46Medical Research Council (MRC)MR/L01193X/1Supplementary DataRJournal article10.1136/bmjopen-2020-048128http://www.scopus.com/inward/record.url?scp=85103917233&partnerID=8YFLogxK