Higher monetary incentives led to a lowered response rate in ambulatory patients: a randomized trial
SourceJournal of Clinical Epidemiology, 68, 11, (2015), pp. 1380-1382
Article / Letter to editor
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Journal of Clinical Epidemiology
SubjectRadboudumc 16: Vascular damage RIHS: Radboud Institute for Health Sciences
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 (euro5.00, euro7.50, euro10.00, and euro12.50) 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 euro12.50 incentive was lower compared with both the euro7.50 and the euro10.00 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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