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. 2018 Sep 21;19(1):513.
doi: 10.1186/s13063-018-2855-5.

Effect of persuasive messages on National Health Service Organ Donor Registrations: a pragmatic quasi-randomised controlled trial with one million UK road taxpayers

Anna Sallis  1   2 , Hugo Harper  3 , Michael Sanders  3
Affiliations

Effect of persuasive messages on National Health Service Organ Donor Registrations: a pragmatic quasi-randomised controlled trial with one million UK road taxpayers

Anna Sallis et al. Trials. .

Abstract

Background: A shortage of organs available for transplantation is causing loss of life. Increasing the number of individuals on the National Health Service (NHS) Organ Donor Register (ODR) is one way to address the shortage of organs. In Great Britain, new drivers registering for their driving licence are invited to join the ODR. A further 17 million drivers renew their road tax online each year, presenting an additional opportunity to prompt drivers to join the ODR. This trial explores the effect of adding persuasive messages to a prompt to join the ODR at the end of road tax payment transactions.

Methods: In this pragmatic, parallel group, quasi-randomised controlled trial, drivers renewing their road tax or registering for a driving licence were alternately allocated, using a JavaScript randomisation code embedded in the GOV.UK website, to view a control prompt inviting sign-ups to the ODR or the same prompt plus one of seven theoretically informed persuasive messages; (i) social norms alone, (ii) social norms plus the NHS ODR logo, (iii) social norms plus an image, (iv) loss frame, (v) gain frame, (vi) reciprocity and (vii) cognitive dissonance. The trial took place over a 4-week period in June 2013. The primary outcome measure was participants completing the online registration form (sign-ups).

Results: Altogether, 1,085,322 website users were included in the study. Further, 1171 more sign-ups were completed under the most effective message (reciprocity) compared to the control prompt alone (reciprocity: n = 4256, control: n = 3085; odds ratio, OR 1.38, 95% confidence interval 1.32-1.45, p < 0.001). The loss-framed message was as effective. All messages increased sign-ups compared to the control prompt apart from the social norms message plus image (n = 2879; OR 0.94, 95% confidence interval 0.89-0.99, p < 0.05).

Conclusions: Short persuasive messages alongside a prompt can persuade more ODR sign-ups for individuals renewing their road tax than a prompt alone. The most effective message remains in place today. Since the trial in 2013, the same message has been implemented across 25 government end-of-transaction websites on GOV.UK, resulting in 529,000 new registrations to the ODR up to 31st October 2017.

Keywords: Cognitive dissonance; Gain frame; Loss frame; Message framing; Organ donation; Reciprocity; Social norms.

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Conflict of interest statement

Ethics approval and consent to participate

An invitation to join the NHS ODR at the end of road tax renewals was already planned by NHSBT and GDS. The researchers saw the opportunity to slow down implementation and ensure robust testing before this was launched nationally. The moral and ethical issues regarding this research were considered by the authors during proposal development and in discussion with a range of other project stakeholders, including officials from the UK Cabinet Office, Department of Health (now the Department of Health and Social Care), NHSBT and GDS. The research placed no additional burden on participants, who were free to ignore the message and close down the web page as the previous transaction was complete. The data have not been aggregated and they are not attributable to individuals.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Participant flow through the trial
See this image and copyright information in PMC

References

    1. NHS Blood and Transplant. Organ Donation and Transplantation Activity Report 2016/17 https://nhsbtdbe.blob.core.windows.net/umbraco-assets-corp/4657/activity... Accessed on 31/12/17
    1. National Institute for Health and Clinical Excellence. Organ donation for transplantation. NICE Clinical Guideline 135. 2011. https://www.nice.org.uk/guidance/cg135/evidence/full-guideline-184994893. Accessed on 02/03/18. - PubMed
    1. Falomir-Pichastor JM, Berent JA, Pereira A. Social psychological factors of post-mortem organ donation: a theoretical review of determinants and promotion strategies. Health Psychol Rev. 2013;7(2):202–247. doi: 10.1080/17437199.2011.570516. - DOI
    1. King AJ, Williams EA, Harrison TR, Morgan SE, Havermahl T. The “tell us now” campaign for organ donation: using message immediacy to increase donor registration rates. J Appl Commun Res. 2012; 10.1080/00909882.2012.670258.
    1. Feeley TH, Moon S. A meta-analytic review of communication campaigns to promote organ donation. Commun Rep. 2009; 10.1080/08934210903258852.

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