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AuthorJia, Pengli
AuthorFuruya-Kanamori, Luis
AuthorQin, Zong-Shi
AuthorJia, Peng-Yan
AuthorXu, Chang
Available date2021-02-07T08:50:56Z
Publication Date2020-08-26
Publication NamePostgraduate Medical Journal
Identifierhttp://dx.doi.org/10.1136/postgradmedj-2020-137868
CitationJia P, Furuya-Kanamori L, Qin Z, et alAssociation between response rates and monetary incentives in sample study: a systematic review and meta-analysisPostgraduate Medical Journal Published Online First: 26 August 2020. doi: 10.1136/postgradmedj-2020-137868
ISSN0032-5473
URIhttp://hdl.handle.net/10576/17558
AbstractTo investigate the effect of monetary incentive and the dose-response relationship of participants' response rates in surveys. Three databases were searched for randomised controlled trials (RCTs) that investigated the effect of monetary incentives on participants' first and final response rates. First response is defined as the responses after the participant was initially contacted and final response is defined as the responses after several reminders were sent. The potential dose-response relationship of the amount of monetary incentive on the relative response rate (RRR) was established by fitting a restricted cubic spline function based on the robust-error meta-regression model. 105 RCTs were identified. The first RRR increased by 49% (RRR=1.49; 95% CI 1.29 to 1.72) when monetary incentives were provided. Dose-response analysis revealed that an amount between US$6.25 and US$8 had the maximum effect on increasing the first response rate. On average, the final RRR increased almost by 20% (RRR=1.18; 95% CI 1.11 to 1.25) with monetary incentive compared to no-monetary incentive. An amount between US$10 and US$15 had the maximum effect on the final response rate, with an increase in the final RRR of 34% (RRR=1.34; 95% CI 1.19 to 1.51). There was a significant increase in the response rate when two or more reminders were sent. Monetary incentives and reminders improve the response rates. Future studies need to consider providing monetary incentives and sending at least two reminders to increase the response rate and reduce the chances of non-response bias.
Languageen
PublisherBMJ Publishing Group
SubjectClinical trials
Infectious diseases
epidemiology
therapeutics
TitleAssociation between response rates and monetary incentives in sample study: a systematic review and meta-analysis.
TypeArticle
ESSN1469-0756
dc.accessType Full Text


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