Impact and Costs of Incentives to Reduce Attrition in Online Trials: Two Randomized Controlled Trials

BACKGROUND: Attrition from follow-up is a major methodological challenge in randomized trials. Incentives are known to improve response rates in cross-sectional postal and online surveys, yet few studies have investigated whether they can reduce attrition from follow-up in online trials, which are p...

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Bibliografski detalji
Glavni autori: Khadjesari, Zarnie, Murray, Elizabeth, Kalaitzaki, Eleftheria, White, Ian R, McCambridge, Jim, Thompson, Simon G, Wallace, Paul, Godfrey, Christine
Format: Artigo
Jezik:Inglês
Izdano: Gunther Eysenbach 2011
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Original Paper
Online pristup:https://ncbi.nlm.nih.gov/pmc/articles/PMC3221348/
https://ncbi.nlm.nih.gov/pubmed/21371988
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.2196/jmir.1523
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