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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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Main Authors: | , , , , , , , |
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Formato: | Artigo |
Idioma: | Inglês |
Publicado em: |
Gunther Eysenbach
2011
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Assuntos: | |
Acesso em linha: | 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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