These were as follows :
to study incompleteness of data, herein called item non-response, generated by a self completion questionnaire ;
to identify the characteristics of item non-responders and the types of questions liable to high item non-response rates ;
and to discuss possible reasons for item non-response.
Item non-response patterns in 12 307 responders (62%) to a representative postal survey based on a stratified sample drawn from family health services authorities' (FHSA) registers were investigated.
Data were analysed for item non-response in three groups depending on when the questionnaire was returned (wave analysis).
The overall completion rate of the questionnaire was examined and the natural logarithm of the proportion of completed questions was used as an outcome variable in multiple regression analysis.
Item non-response to key questions and questions of different types was examined.
Wave analysis : the overall completion rate of the questionnaire was 86% in questionnaires returned before the first reminder and 83% - 84% in those sent back after subsequent reminders.
Overall pattern of item non-response : respondents failed to complete a mean of 15% and a median of 10% of the questionnaire.
All questions in the questionnaire had some item non-response, ranging from 1% to 85%. (...)
Mots-clés Pascal : Enquête par correspondance, Questionnaire, Non réponse, Analyse item, Mode de vie, Epidémiologie, Méthodologie, Homme, Angleterre, Grande Bretagne, Royaume Uni, Europe, Biais sélection
Mots-clés Pascal anglais : Mail inquiry, Questionnaire, Non response, Item analysis, Life habit, Epidemiology, Methodology, Human, England, Great Britain, United Kingdom, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0226747
Code Inist : 002B30A01A1. Création : 11/06/1997.