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Bmc Health Serv Res · Jun 2004
Randomized Controlled Trial Clinical TrialEffect of prize draw incentive on the response rate to a postal survey of obstetricians and gynaecologists: a randomised controlled trial. [ISRCTN32823119].
- Sharon H Moses and T Justin Clark.
- Worcestershire Royal Hospital, Worcester WR5 1DD UK. smoses@doctors.org.uk
- Bmc Health Serv Res. 2004 Jun 28;4(1):14.
BackgroundResponse rates to postal questionnaires are falling and this threatens the external validity of survey findings. We wanted to establish whether the incentive of being entered into a prize draw to win a personal digital assistant (PDA) would increase the response rate for a national survey of consultant obstetricians and gynaecologists.MethodsA randomised controlled trial was conducted. This involved sending a postal questionnaire to all Consultant Obstetricians and Gynaecologists in the United Kingdom. Recipients were randomised to receiving a questionnaire offering a prize draw incentive (on response) or no such incentive.ResultsThe response rate for recipients offered the prize incentive was 64% (461/716) and 62% (429/694) in the no incentive group (relative rate of response 1.04, 95% CI 0.96 - 1.13)ConclusionThe offer of a prize draw incentive to win a PDA did not significantly increase response rates to a national questionnaire survey of consultant obstetricians and gynaecologists.
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