Higher monetary incentives led to a lowered response rate in ambulatory patients: a randomized trial.

J Clin Epidemiol

Radboud Institute for Health Sciences, Department of IQ healthcare, Radboud university medical center, Nijmegen, The Netherlands.

Published: November 2015

Objectives: Monetary incentives can increase response rate in patient surveys, but calibration of the optimal incentive level is required. Our aim was to assess the effect of different monetary incentives on response rates to calibrate the optimal monetary incentive for ambulatory patients.

Study Design And Setting: A patient-randomized trial was performed in which targeted individuals received different gift vouchers (€5.00, €7.50, €10.00, and €12.50) on completion of a survey and interview. Eligible patients (diagnosed type 2 diabetes, over 18 years) were recruited from primary care practices.

Results: The response rate for the €12.50 incentive was lower compared with both the €7.50 and the €10.00 incentive [odds ratio (OR) = 0.60 and OR = 0.58]. A nonlinear model yield a better fit than a linear model. Within the observed range of incentive levels, an overall decrease in response rate was found.

Conclusion: High monetary incentives are not only inefficient but also less effective.

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Source
http://dx.doi.org/10.1016/j.jclinepi.2015.03.018DOI Listing

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