Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/26919
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dc.contributor.authorThompson, Tom Pen_UK
dc.contributor.authorGreaves, Colin Jen_UK
dc.contributor.authorAyres, Richarden_UK
dc.contributor.authorAveyard, Paulen_UK
dc.contributor.authorWarren, Fiona Cen_UK
dc.contributor.authorByng, Richarden_UK
dc.contributor.authorTaylor, Rod Sen_UK
dc.contributor.authorCampbell, John Len_UK
dc.contributor.authorUssher, Michaelen_UK
dc.contributor.authorMichie, Susanen_UK
dc.contributor.authorWest, Roberten_UK
dc.contributor.authorTaylor, Adrianen_UK
dc.date.accessioned2018-04-03T22:48:21Z-
dc.date.available2018-04-03T22:48:21Z-
dc.date.issued2016-10-27en_UK
dc.identifier.other524en_UK
dc.identifier.urihttp://hdl.handle.net/1893/26919-
dc.description.abstractBackground: Study attrition has the potential to compromise a trial's internal and external validity. The aim of the present study was to identify factors associated with participant attrition in a pilot trial of the effectiveness of a novel behavioural support intervention focused on increasing physical activity to reduce smoking, to inform the methods to reduce attrition in a definitive trial.  Methods: Disadvantaged smokers who wanted to reduce but not quit were randomised (N = 99), of whom 61 (62 %) completed follow-up assessments at 16 weeks. Univariable logistic regression was conducted to determine the effects of intervention arm, method of recruitment, and participant characteristics (sociodemographic factors, and lifestyle, behavioural and attitudinal characteristics) on attrition, followed by multivariable logistic regression on those factors found to be related to attrition.  Results: Participants with low confidence to quit, and who were undertaking less than 150 mins of moderate and vigorous physical activity per week at baseline were less likely to complete the 16-week follow-up assessment. Exploratory analysis revealed that those who were lost to follow-up early in the trial (i.e., by 4 weeks), compared with those completing the study, were younger, had smoked for fewer years and had lower confidence to quit in the next 6 months. Participants who recorded a higher expired air carbon monoxide reading at baseline were more likely to drop out late in the study, as were those recruited via follow-up telephone calls. Multivariable analyses showed that only completing less than 150 mins of physical activity retained any confidence in predicting attrition in the presence of other variables.  Conclusions: The findings indicate that those who take more effort to be recruited, are younger, are heavier smokers, have less confidence to quit, and are less physically active are more likely to withdraw or be lost to follow-up. en_UK
dc.language.isoenen_UK
dc.publisherBioMed Centralen_UK
dc.relationThompson TP, Greaves CJ, Ayres R, Aveyard P, Warren FC, Byng R, Taylor RS, Campbell JL, Ussher M, Michie S, West R & Taylor A (2016) Factors associated with study attrition in a pilot randomised controlled trial to explore the role of exercise-assisted reduction to stop (EARS) smoking in disadvantaged groups. Trials, 17 (1), Art. No.: 524. https://doi.org/10.1186/s13063-016-1641-5en_UK
dc.rights© The Author(s). 2016 This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.en_UK
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_UK
dc.subjectRetentionen_UK
dc.subjectdrop outen_UK
dc.subjectphysical activityen_UK
dc.subjectsmoking reductionen_UK
dc.subjectharm reductionen_UK
dc.titleFactors associated with study attrition in a pilot randomised controlled trial to explore the role of exercise-assisted reduction to stop (EARS) smoking in disadvantaged groupsen_UK
dc.typeJournal Articleen_UK
dc.identifier.doi10.1186/s13063-016-1641-5en_UK
dc.identifier.pmid27788686en_UK
dc.citation.jtitleTrialsen_UK
dc.citation.issn1745-6215en_UK
dc.citation.volume17en_UK
dc.citation.issue1en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.author.emailmichael.ussher@stir.ac.uken_UK
dc.citation.date27/10/2016en_UK
dc.contributor.affiliationPlymouth University Peninsula School of Medicine and Dentistryen_UK
dc.contributor.affiliationUniversity of Exeteren_UK
dc.contributor.affiliationPlymouth University Peninsula School of Medicine and Dentistryen_UK
dc.contributor.affiliationUniversity of Oxforden_UK
dc.contributor.affiliationUniversity of Exeteren_UK
dc.contributor.affiliationPlymouth University Peninsula School of Medicine and Dentistryen_UK
dc.contributor.affiliationUniversity of Exeteren_UK
dc.contributor.affiliationUniversity of Exeteren_UK
dc.contributor.affiliationInstitute for Social Marketingen_UK
dc.contributor.affiliationUniversity College Londonen_UK
dc.contributor.affiliationUniversity College Londonen_UK
dc.contributor.affiliationPlymouth University Peninsula School of Medicine and Dentistryen_UK
dc.identifier.isiWOS:000386736200002en_UK
dc.identifier.scopusid2-s2.0-84992500361en_UK
dc.identifier.wtid499879en_UK
dc.contributor.orcid0000-0002-0995-7955en_UK
dc.date.accepted2016-10-06en_UK
dcterms.dateAccepted2016-10-06en_UK
dc.date.filedepositdate2018-03-23en_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionAMen_UK
local.rioxx.authorThompson, Tom P|en_UK
local.rioxx.authorGreaves, Colin J|en_UK
local.rioxx.authorAyres, Richard|en_UK
local.rioxx.authorAveyard, Paul|en_UK
local.rioxx.authorWarren, Fiona C|en_UK
local.rioxx.authorByng, Richard|en_UK
local.rioxx.authorTaylor, Rod S|en_UK
local.rioxx.authorCampbell, John L|en_UK
local.rioxx.authorUssher, Michael|0000-0002-0995-7955en_UK
local.rioxx.authorMichie, Susan|en_UK
local.rioxx.authorWest, Robert|en_UK
local.rioxx.authorTaylor, Adrian|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2018-03-29en_UK
local.rioxx.licencehttp://creativecommons.org/licenses/by/4.0/|2018-03-29|en_UK
local.rioxx.filenameThompson et al.pdfen_UK
local.rioxx.filecount1en_UK
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