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Document ID (ISN)56015
CIS number 91-854
ISBN(s) 91-7045-067-6
Year 1990
Convention or series no. Arbete och hälsa 1990:17
Author(s) Støttrup Hansen E., Ahlbom A., Axelson O., Hogstedt C., Juul Jensen U., Olsen J.
Title "Negative results" - No effect or information? A review of some problems in occupational epidemiology
Bibliographic information Arbetsmiljöinstitutet, Förlagstjänst, 171 84 Solna, Sweden, 1990. 59p. 72 ref.
Abstract The purpose of this report was to give a comprehensive analysis of some of the major problems in performing a scientific assessment of work-related hazards. How can reliable negative results be distinguished from non-informative data? Firstly, it is stated that the observation of no association is fundamental for a no-effect claim. Secondly, the effect estimate must be precisely determined, and the apparent absence of any relationship must not be ascribable to non-differential misclassification, any "healthy worker effect", or any other systematic error. When evidence from several studies is tabulated, it should be noted in particular whether the absence of any association was observed consistently and universally.
Descriptors (primary) hazard evaluation; epidemiological aspects
Descriptors (secondary) healthy worker effect; observer variation; report
Document type E - Books, reports, proceedings
Country / State or ProvinceDenmark; Sweden
Subject(s) Medicine, hygiene and first aid
Broad subject area(s) Occupational medicine, epidemiology
Browse category(ies) Risk evaluation