Abstract:
STUDY OBJECTIVE:To assess the effectiveness of a telephone reminder in increasing responses to postal surveys and to calculate the differential costs per completed questionnaire. DESIGN:Randomised controlled trial. SETTING:Australian university and rehabilitation medicine practice. PARTICIPANTS:The trial was conducted in 1999 among the 143 non-respondents to a questionnaire about work related neck and upper body disorders. The questionnaire was sent to two Australian female samples: 200 office workers (Sample A) and 92 former rehabilitation medicine patients (Sample B). A reminder letter, another copy of the questionnaire and a final letter were sent at two week intervals. Half of the non-respondents within each sample were randomly selected to receive a telephone reminder just after the second mailout of the questionnaire. All direct costs were calculated. MAIN RESULTS:Responses were significantly higher among those who received the telephone reminder intervention (relative risk 2.54, 95% confidence intervals 1.43 to 4.52). Analysed by intention to phone, 47% of non-respondents in Sample A and 38% in Sample B returned a complete questionnaire after the intervention, compared with 21% and 10%, respectively, in the control groups. For the 112 women (combined samples) who returned completed questionnaires before randomisation, the average cost per respondent was AUD14. There was a higher total cost for the intervention groups (AUD851 versus AUD386 for controls), but the significantly higher number of additional completed responses (31 versus 12) resulted in a 15% lower marginal cost per completed questionnaire in those groups. CONCLUSION:Telephone reminders are cost effective in improving responses to postal surveys.
journal_name
J Epidemiol Community Healthjournal_title
Journal of epidemiology and community healthauthors
Salim Silva M,Smith WT,Bammer Gdoi
10.1136/jech.56.2.115keywords:
subject
Has Abstractpub_date
2002-02-01 00:00:00pages
115-8issue
2eissn
0143-005Xissn
1470-2738journal_volume
56pub_type
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journal_title:Journal of epidemiology and community health
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