Does non-responder bias have a significant effect on the results in a postal questionnaire study? View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-09

AUTHORS

Jyrki-Tapani Kotaniemi, Juhani Hassi, Matti Kataja, Elsy Jönsson, Lauri. A. Laitinen, Anssi R.A. Sovijärvi, Bo Lundbäck

ABSTRACT

BACKGROUND AND AIM: In epidemiological questionnaire studies results can be influenced by non-responder bias. However, in respiratory epidemiology this has been analysed in very few recently published papers. The aim of our paper is to assess if the results found in our previous postal questionnaire study in an adult population in Northern Finland were biased by non-response. METHODS: A random sample of 385 persons from the 1,284 non-responders in a previous postal questionnaire study was examined. The same questionnaire as in the original study was again mailed to these persons, and those still not answering were contacted by phone. RESULTS: Totally 183 complete answers (48%) were collected. Lack of interest (56%) and forgetting to mail the response letter (22%) were the most common reasons to non-response. Typical non-responders were young men and current smokers who less frequently reported respiratory symptoms in exercise and asthma than the responders in the original study. Answers collected by phone gave for some questions higher prevalence rates than postal answers. CONCLUSION: Firstly, in this population the response rate (83.6%) in the original study was high enough to provide reliable results for respiratory symptoms and diseases, only the prevalence of current smoking was biased by non-response. Secondly, the methods used for collecting responses in a non-response study may influence the results. More... »

PAGES

809-817

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1015615130459

DOI

http://dx.doi.org/10.1023/a:1015615130459

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002075081

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/12081098


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