A nested randomised controlled trial of a newsletter and Post-it ® note did not increase postal questionnaire response rates in a falls prevention trial - Rodgers S, Sbizzera I, Cockayne S, Fairhurst C, Lamb SE, Vernon W, Watson J, Hewitt C, Torgerson D.

Background: Attrition (i.e. when participants do not return the questionnaires) is a problem for many randomised controlled trials. The resultant loss of data leads to a reduction in statistical power and can lead to bias. The aim of this study was ...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Age: Elder Adults Source Type: news