A Population-Based Job Exposure Matrix for Power-Frequency Magnetic Fields

Details

• Personal Author:
  Bowman, Joseph D. ; Touchstone JA ; Yost MG
• Description:
  A population-based job exposure matrix (JEM) was developed to assess personal exposures to power-frequency magnetic fields (MF) for epidemiologic studies. The JEM compiled 2317 MF measurements taken on or near workers by 10 studies in the United States, Sweden, New Zealand, Finland, and Italy. A database was assembled from the original data for six studies plus summary statistics grouped by occupation from four other published studies. The job descriptions were coded into the 1980 Standard Occupational Classification system (SOC) and then translated to the 1980 job categories of the U.S. Bureau of the Census (BOC). For each job category, the JEM database calculated the arithmetic mean, standard deviation, geometric mean, and geometric standard deviation of the workday-average MF magnitude from the combined data. Analysis of variance demonstrated that the combining of MF data from the different sources was justified, and that the homogeneity of MF exposures in the SOC occupations was comparable to JEMs for solvents and particulates. BOC occupation accounted for 30% of the MF variance (p << 10-6), and the contrast (ratio of the between-job variance to the total of within- and between-job variances) was 88%. Jobs lacking data had their exposures inferred from measurements on similar occupations. The JEM provided MF exposures for 97% of the person-months in a population-based case-control study and 95% of the jobs on death certificates in a registry study covering 22 states. Therefore, we expect this JEM to be useful in other population-based epidemiologic studies. [Description provided by NIOSH]
• Subjects:
  Epidemiology Magnetic Fields Occupational Exposure Occupational Health Particulate Matter Safety Solvents
• Keywords:
  Analytical-methods Information-retrieval-systems Job-analysis Magnetic-fields Magnetic-properties Mathematical-models Models Occupational-hazards Occupations Particulate-sampling-methods Particulates Quantitative-analysis Statistical-analysis

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• ISSN:
  1545-9624
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 10 ; OSHA Region 5 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  4
• Issue:
  9
• NIOSHTIC Number:
  nn:20032528
• Citation:
  J Occup Environ Hyg 2007 Sep; 4(9):715-728
• Contact Point Address:
  Joseph D. Bowman, National Institute for Occupational Safety and Health, Division of Applied Research and Technology, Engineering and Physical Hazards Branch, 4676 Columbia Parkway, MS C-26, Cincinnati, OH 45226
• Email:
  jdb0@cdc.gov
• Federal Fiscal Year:
  2007
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3e26843078ff973443643ac2c65be6f9f4cbaab28f3978628b0ae17071cdaeb2f7233342c21772042f74a8ae1e776dede3687312c28af73535fba07f3ac645a4
• Download URL:
  https://stacks.cdc.gov/view/cdc/186465/cdc_186465_DS1.pdf
• File Type:
  [PDF - 653.26 KB ]