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Investigating the effect of providing monetary incentives to participants on completion rates of referred co-respondents: an embedded randomized controlled trial. Study within a trial (SWAT) protocol
journal contribution
posted on 2023-06-10, 06:18 authored by Abigail DunnAbigail Dunn, James Alvarez, Amy Arbon, Stephen BremnerStephen Bremner, Chloe Elsby-Pearson, Richard Emsley, Chris JonesChris Jones, Peter Lawrence, Kathryn LesterKathryn Lester, Mirjana Majdandžic, Natalie Morson, Nicky Perry, Julia SimnerJulia Simner, Samantha Cartwright-HattonSamantha Cartwright-Hatton, Abi ThomsonBackground Parent-report questionnaires are a common method of generating data on child outcomes in mental health studies. A second report from another person who knows the child (co-respondent) is implemented to reduce bias and increase objectivity. The success of this approach is dependent on the engagement of co-respondents, which can be difficult. Financial incentives are used to increase data return in clinical trials, and to promote referral rates in online marketing. This protocol describes the use of an embedded randomised controlled trial (RCT) to investigate the effect of financial incentives on rates of co-respondent data completion. In the host RCT (of an online intervention designed to reduce the impact of a parent's anxiety on their child) index participants (i.e. parents) are asked to invite a co-respondent to complete measures on the index child. This study will test the hypothesis that providing monetary incentives to index participants will increase the outcome measure completion rate of co-respondents. Methods Embedded RCT of two parallel groups. Participants in the intervention arm will be sent a £10 voucher if their chosen co-respondent completes online baseline measures. Participants in the control arm will not be offered payment regardless of their chosen co-respondent's behaviour. 1754 participants will take part. Analysis will compare co-respondent outcome measure completion rates between the two arms at baseline and follow-up. Conclusion Findings from this study will provide evidence on the impact of offering payment to index participants on return rates of co-respondent data. This will inform resource allocation within future clinical trials.
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Publication status
- Published
File Version
- Published version
Journal
Contemporary Clinical Trials CommunicationsISSN
2451-8654Publisher
ElsevierExternal DOI
Volume
32Page range
1-8Department affiliated with
- Primary Care and Public Health Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2023-02-22First Open Access (FOA) Date
2023-02-22First Compliant Deposit (FCD) Date
2023-02-21Usage metrics
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