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. 2019 Jul 4;19(1):138.
doi: 10.1186/s12874-019-0786-9.

Effect of prepaid and promised financial incentive on follow-up survey response in cigarette smokers: a randomized controlled trial

Yee Tak Derek Cheung  1 , Xue Weng  1 , Man Ping Wang  2 , Sai Yin Ho  3 , Antonio Cho Shing Kwong  4 , Vienna Wai Yin Lai  4 , Tai Hing Lam  3
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Effect of prepaid and promised financial incentive on follow-up survey response in cigarette smokers: a randomized controlled trial (VSports)

Yee Tak Derek Cheung et al. BMC Med Res Methodol. .

Abstract

Background: Monetary incentive is often used to increase response rate in smokers' survey, but such effect of prepaid and promised incentives in a follow-up survey is unknown VSports手机版. We compared the effect of different incentive schemes on the consent and retention rates in a follow-up survey of adult cigarette smokers. .

Methods: This was a randomized controlled trial (RCT) in Hong Kong, China. Smokers who completed a non-incentivized baseline telephone smoking survey were invited to a 3-month follow-up, with randomization into (1) the control group (no incentive), (2) a promised HK$100 (US$12. 8) incentive upon completion, (3) a promised HK$200 (US$25. 6) incentive upon completion, or (4) a prepaid HK$100 incentive plus another promised HK$100 incentive ("mixed incentive"). Crude risk ratios from log-binomial regression models were used to assess if the 3 incentive schemes predicted higher rates of consent at baseline or retention at 3-month than no incentive. V体育安卓版.

Results: In total, 1246 smokers were enrolled. The overall consent and retention rates were 37. 1 and 23. 0%, respectively. Both rates generally increased with the incentive amount and offer of prepaid incentive. The mixed incentive scheme marginally increased the retention rate versus no incentive (26. 8% vs 20. 3%; risk ratio (RR) = 1. 32; 95% CI: 1. 00-1. 76; P = 0. 053), but not the consent rate (RR = 1. 13; 95% CI: 0. 93-1. 38; P = 0. 22). Among the consented participants, approximately 50% in the mixed incentive group received the mailed prepaid incentive, who achieved a higher retention rate than the group without incentives (82. 8% vs 56 V体育ios版. 1%; RR = 1. 48; 95% CI: 1. 21-1. 80; P < 0. 01). .

Conclusion: The mixed incentive scheme combining the prepaid and promised incentive was effective to increase the follow-up retention rate by 48%. We recommend this mixed incentive scheme to increase the follow-up retention rate VSports最新版本. More efficient methods of delivering the incentive are needed to maximize its effects. .

Trial registration: U. S. Clinical Trials registry (clinicaltrials. gov, retrospectively registered, reference number: NCT03297866 ) V体育平台登录. .

Keywords: Follow-up; Incentive; Randomized controlled trial; Smoker. VSports注册入口.

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Conflict of interest statement

The funder was not involved in the collection, analysis and interpretation of the data, but two authors from the funder approved the submission of the manuscript.

References

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