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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...
Autores principales: | Khadjesari, Zarnie, Murray, Elizabeth, Kalaitzaki, Eleftheria, White, Ian R, McCambridge, Jim, Thompson, Simon G, Wallace, Paul, Godfrey, Christine |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Gunther Eysenbach
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3221348/ https://www.ncbi.nlm.nih.gov/pubmed/21371988 http://dx.doi.org/10.2196/jmir.1523 |
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