在邀请信中附上调查问卷并不能提高电话调查的回复率。

Including the questionnaire with an invitation letter did not improve a telephone survey's response rate.

作者信息

Byrne Christopher M, Harrison James D, Young Jane M, Selby Warwick S, Solomon Michael J

机构信息

Surgical Outcomes Research Centre, Sydney South West Area Health Service & University of Sydney, Australia.

出版信息

J Clin Epidemiol. 2007 Dec;60(12):1312-4. doi: 10.1016/j.jclinepi.2007.04.005. Epub 2007 Aug 24.

DOI:10.1016/j.jclinepi.2007.04.005

PMID:17998087

Abstract

OBJECTIVE

To determine whether including the study questionnaire with a letter of invitation improves the response rate in a telephone-based survey.

STUDY DESIGN AND SETTING

This randomized controlled trial was part of a larger study to assess patient preferences for novel and controversial treatments for inflammatory bowel disease at Royal Prince Alfred Hospital, a tertiary referral teaching hospital in Sydney, Australia.

RESULTS

Of 270 eligible patients, 124 (46%) were randomized to receive the questionnaire plus invitation whereas 146 (54%) were in the control group receiving a letter of invitation only. The consent rate was 26% for those receiving the questionnaire and 36% for the control group. The odds ratio for consent to participate among those sent the questionnaire to those not sent the questionnaire was 0.63 (95% CI=0.37-1.07).

CONCLUSION

This study found that the advance mailing of a questionnaire to potential participants in a telephone survey reduced the likelihood of their participation.

摘要