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Cost-Effectiveness of a Lottery for Increasing Physicians’ Responses to a Mail Survey

Faculté de médecine, Université de Sherbrooke

Philippe De Wals

Faculté de médecine, Université de Sherbrooke, and Régie régionale de la santé et des services sociaux de la Montérégie

François Milord

Faculté de médecine, Université de Sherbrooke, and Régie régionale de la santé et des services sociaux de la Montérégie

To evaluate the cost-effectiveness of a lottery on physicians’ responses to a mail survey, a randomized controlled trial was conducted with a random sample of 1,000 members of the Quebec Federation of General Practitioners in 1997. For the first mailing of this survey, each respondent was randomly assigned to the control or experimental group, which was offered participation in a lottery upon return of the questionnaire. Response rate was 41.2% in the experimental group and 34.8% in the control group, a 6.4% difference (CI_95%: 0.6% – 12.6%). The additional cost of the lottery was about Can$500, giving an incremental cost of Can$16 per questionnaire returned. In conclusion, a lottery resulted in a small but statistically significant increase in the response rate of physicians to a mail survey. This method may be a cost-effective option when applied to large surveys.

Evaluation & the Health Professions, Vol. 24, No. 1, 47-52 (2001)
DOI: 10.1177/01632780122034777


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