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

BackgroundAttrition 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 par...

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Main Authors: Khadjesari, Zarnie (Author), Murray, Elizabeth (Author), Kalaitzaki, Eleftheria (Author), White, Ian R (Author), McCambridge, Jim (Author), Thompson, Simon G (Author), Wallace, Paul (Author), Godfrey, Christine (Author)
Format: Book
Published: JMIR Publications, 2011-03-01T00:00:00Z.
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