Occupational exposure to magnetic fields in relation to mortality from brain cancer among electricity generation and transmission workers.

摘要: OBJECTIVE: To investigate whether the risks of mortality from brain cancer are related to occupational exposure magnetic fields. METHODS: A total 112 cases primary (1972-91) were identified a cohort 84,018 male and female employees (then) Central Electricity Generating Board its privatised successor companies. Individual cumulative exposures fields estimated by linking available computerised job history data with field measurements collected over 675 person-workshifts. Estimated histories case workers compared those 654 control drawn (nested case-control study), means conditional logistic regression. RESULTS: For assessments based on arithmetic means, risk for subjects an 5.4-13.4 microT.y v lower (0.0-5.3 microT.y) was 1.04 (95% confidence interval CI) 0.60 1.80). The corresponding relative in higher (> or = 13.5 0.95 CI 0.54 1.69). There no indication positive trend either when analysis used geometric restricted received within five years diagnosis (or period controls). CONCLUSIONS: Although categorisation solely recent observations, study findings do not support hypothesis that is associated