Meta-analysis of randomised trials of monetary incentives and response to mailed questionnaires.

ABSTRACT:

Study objective

To quantify the increase in mailed questionnaire response attributable to a monetary incentive.

Design

A systematic search for randomised controlled trials of monetary incentives and mailed questionnaire response was conducted. For each trial identified, logistic regression was used to estimate the odds ratio for response per 0.01 dollars incentive increase. Odds ratios were pooled in a series of random effect meta-analyses stratified by the minimum and maximum amounts offered. Piecewise logistic regression was used to estimate the odds ratio for response per $0.01 increase given in each of five incentive ranges.

Setting

Populations in several developed countries, predominantly the USA.

Participants

85,671 randomised participants from 88 trials.

SUBMITTER: Edwards P 

PROVIDER: S-EPMC1732953 | biostudies-literature | 2005 Nov

REPOSITORIES: biostudies-literature