منابع مشابه
Bias in occupational epidemiology studies.
The design of occupational epidemiology studies should be based on the need to minimise random and systematic error. The latter is the focus of this paper, and includes selection bias, information bias and confounding. Selection bias can be minimised by obtaining a high response rate (and by appropriate selection of the control group in a case-control study). In general, it is important to ensu...
متن کاملIntervention studies in occupational epidemiology.
Correspondence to: Prof. T S Kristensen, National Institute of Occupational Health, Lerso Parkalle 105, DK-2100 Copenhagen O, Denmark; [email protected] _________________________ T he proportion of intervention studies in occupational epidemiology has been growing rapidly in recent years. This is a positive trend, which makes it necessary to discuss a number of theoretical, methodological, and practic...
متن کاملSelection bias in occupational sperm studies.
Participation rates in sperm studies are typically 25-50%, and therefore it is a matter of concern whether the men who provide semen samples truly reflect the parent population. The authors analyzed data from three Danish occupational sperm studies and evaluated the relation between age and occurrence of subfertility to participation and provision of semen samples. Age and subfertility were fou...
متن کاملExposure assessment in industry specific retrospective occupational epidemiology studies.
Quantitative estimation of exposure for occupational epidemiology studies has received increasing attention in recent years and, as a result, a body of methodological literature has begun to take form. This paper reviews the generic issues in the methodology of exposure assessment, particularly methods for quantitative retrospective assessment studies. A simple framework, termed an exposure dat...
متن کاملExtrapolation from occupational studies: a substitute for environmental epidemiology.
Extrapolation from occupational data to general environmental exposures gives some interesting results, and these results might be useful in our decision-making process. These results could never be observed by environmental epidemiology and this method probably represents the only way of quantifying the health effects of low-exposure levels. Three linear models for extrapolating to low levels ...
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 2007
ISSN: 1351-0711
DOI: 10.1136/oem.2006.026690