Response and non-response to postal questionnaire follow-up in a clinical trial--a qualitative study of the patient's perspective.
RATIONALE, AIMS AND OBJECTIVES: Many studies have investigated response issues to postal questionnaires in educational and market research surveys. Behavioural theories have been applied to survey research to understand response decisions. Little attention has focussed specifically on response issues to postal questionnaires used to collect data in clinical trials. This qualitative study, nested within an acute injury RCT, examines factors affecting response and non-response from the clinica...Expand abstract
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