Balancing Efficiencies and Tradeoffs in Epidemiological Field Studies
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Описание:
In order to investigate work-related back injuries, researchers need efficient, accurate occupational exposure assessment methods suitable for large samples. This book examines critical decisions for measuring physical workload: How should exposure be measured? For what duration? Who should be measured, and how many times? To answer these questions, low-back electromyography (EMG) was collected during 138 full-shift field measurements over 30 different job titles at 50 different worksites in 5 heavy industries: forestry, transportation, wood products, construction, and warehousing. Observations and self-reports of working exposures were collected concurrently. Among the results emerges a theme of optimizing the choices for study design and sampling strategy. The ubiquitous constraints of budget and access to industrial populations require tradeoffs between using a highly accurate exposure assessment method on a few people or a less precise method on a larger number of people, between...Похожие книги
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