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. 1977 Mar;6(1):65-7.
doi: 10.1093/ije/6.1.65.

A study of mail survey method

C A Newland, W E Waters, A P Standford, B G Batchelor

A study of mail survey method

C A Newland et al. Int J Epidemiol. 1977 Mar.

Abstract

A major disadvantage of the mail survey in medical research is non-response, which may introduce bias. This study measured the effect of two simple factors on the response rate to a questionnaire concerning headache and migraine in a survey of 2,508 electors. The two factors were the class of postage and the colour of envelopes used; neither was found to have a significant effect. It was concluded that cheaper mailing methods are not likely to jeopardise response.

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