Article: Effect of prize draw incentive on the response rate to a postal survey of obstetricians and gynaecologists: a randomised controlled trial. [ISRCTN32823119]

Background: Response 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.

Methods: A 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.

Results: The 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)

Conclusion: The 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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References

1.

McLaren B, Shelley J . Response rates of Victorian general practitioners to a mailed survey on miscarriage: randomised trial of a prize and two forms of introduction to the research. Aust N Z J Public Health. 2000; 24(4):360-4. DOI: 10.1111/j.1467-842x.2000.tb01593.x. View

2.

Clark T, Khan K, Gupta J . Provision of pen along with questionnaire does not increase the response rate to a postal survey: a randomised controlled trial. J Epidemiol Community Health. 2001; 55(8):595-6. PMC: 1731952. DOI: 10.1136/jech.55.8.595. View

3.

McAvoy B, Kaner E . General practice postal surveys: a questionnaire too far?. BMJ. 1996; 313(7059):732-3; discussion 733-4. PMC: 2352115. DOI: 10.1136/bmj.313.7059.732. View

4.

Leung G, Ho L, Chan M, M Johnston J, Wong F . The effects of cash and lottery incentives on mailed surveys to physicians: a randomized trial. J Clin Epidemiol. 2002; 55(8):801-7. DOI: 10.1016/s0895-4356(02)00442-0. View

5.

Clark T, Khan K, Gupta J . Effect of paper quality on the response rate to a postal survey: a randomised controlled trial. ISRCTN 32032031. BMC Med Res Methodol. 2002; 1:12. PMC: 64502. DOI: 10.1186/1471-2288-1-12. View

Effect of Prize Draw Incentive on the Response Rate to a Postal Survey of Obstetricians and Gynaecologists: a Randomised Controlled Trial. [ISRCTN32823119]