Journal of clinical epidemiology
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Randomized Controlled Trial Multicenter Study
Thicker paper and larger font increased response and completeness in a postal survey.
To investigate the effect of font size and paper thickness on the response to, and completion of, a self-completion postal questionnaire among older people with joint pain. ⋯ This study demonstrates that questionnaires in larger font and on thicker paper may produce higher and more complete responses than surveys using standard size font and standard thickness paper, and should therefore be considered in studies among older people.