Investigator bias and interviewer bias: The problem of reporting systematic error in epidemiology

Epidemiologists recognize that systematic errors in the design or conduct of a study may bias the results. Information on the exposure of interest may be especially prone to misclassification. Even information that has been well-documented may be reported incorrectly. Study subjects may have difficu...

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Bibliographic Details
Published inJournal of clinical epidemiology Vol. 47; no. 8; pp. 825 - 827
Main Author Wynder, Ernst L.
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier Inc 01.08.1994
Elsevier
Subjects
Attitude to Health
Biological and medical sciences
Epidemiologic Methods
Epidemiology
General aspects
Humans
Interviews as Topic
Medical sciences
Methodology
Observer Variation
Public health. Hygiene
Public health. Hygiene-occupational medicine
Human
Error
Methodological bias
Epidemiology
Public health
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ISSN0895-4356
1878-5921
DOI10.1016/0895-4356(94)90184-8

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Summary:Epidemiologists recognize that systematic errors in the design or conduct of a study may bias the results. Information on the exposure of interest may be especially prone to misclassification. Even information that has been well-documented may be reported incorrectly. Study subjects may have difficulty recalling past exposures or behaviors, or may provide responses based on wishful thinking. The nature and importance of these biases is not always fully considered by investigators in their data analysis and in their investigation. This paper reviews the most common type of biases and cites examples of how the responses of subjects substantially affect study results.
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ISSN:0895-4356
1878-5921
DOI:10.1016/0895-4356(94)90184-8