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

• Príomhchruthaitheoirí: Khadjesari, Zarnie (Údar), Murray, Elizabeth (Údar), Kalaitzaki, Eleftheria (Údar), White, Ian R (Údar), McCambridge, Jim (Údar), Thompson, Simon G (Údar), Wallace, Paul (Údar), Godfrey, Christine (Údar)
• Formáid: LEABHAR
• Foilsithe / Cruthaithe: JMIR Publications, 2011-03-01T00:00:00Z.
• Ábhair: article
• Rochtain ar líne: Connect to this object online.

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...