Assessment and Grouping of Occupational Magnetic Field Exposure in Five Electric Utility Companies

Objectives Occupational exposure to 60-Hz magnetic fields was surveyed among randomly selected workers in five electric power companies. Methods The study facilitated the examination of exposure variability and provided the base for a job-exposure matrix linking health outcomes and occupational magn...

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Bibliographic Details
Published in:Scandinavian Journal of Work, Environment ＆ Health Environment ＆ Health, 1995-02, Vol.21 (1), p.43-50
Main Authors: Kromhout, Hans, Loomis, Dana P, Mihlan, Gary J, Peipins, Lucy A, Kleckner, Robert C, Iriye, Richard, Savitz, David A
Format: Article
Language:English
Subjects:
Adult
Air Quality
Analysis of Variance
Arithmetic mean
Biological and medical sciences
Business structures
Chemical hazards
Cohort Studies
Confidence Intervals
Data Collection - methods
Effects of various physical factors on living matter (vibrations, electric field, ultrasound, sound...)
Electric fields
Electric utilities
Electricity
Electromagnetic Fields
Environmental Monitoring
Fundamental and applied biological sciences. Psychology
Humans
Luchtkwaliteit
Magnetic fields
Mathematical Computing
Occupational classification
Occupational Exposure - analysis
Power Plants
Random Allocation
Range errors
Standard deviation
Statistical variance
Tissues, organs and organisms biophysics
United States
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Summary:Objectives Occupational exposure to 60-Hz magnetic fields was surveyed among randomly selected workers in five electric power companies. Methods The study facilitated the examination of exposure variability and provided the base for a job-exposure matrix linking health outcomes and occupational magnetic field exposures. Results Average exposures ranged from 0.11 to 1.50 μT. The differences among the five companies were small, the more urban companies showing somewhat higher averages. The day-to-day component of variance exceeded the within-and between-group components of variance. The final job-exposure matrix consisted of five groups with average exposure levels of 0.12,0.21,0.39,0.62, and 1.27 μT. Given the variance in exposure, even this optimal grouping considerably overlapped. Conclusions The job-exposure matrix used in this study efficiently incorporated the differences in exposure within occupational categories between companies and provided an objective and statistically based method for estimating cumulative magnetic field exposure.
ISSN:0355-3140
1795-990X
DOI:10.5271/sjweh.7