New electric‐shock job exposure matrix

Vergara, Ximena; Kheifets, Leeka; Silva, Michael; Bracken, T. Dan; Yost, Michael G.

doi:10.1002/ajim.21027

Cited by 12 publications

(18 citation statements)

References 28 publications

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“…Given the severity and shock perception ranges, the ES JEM would likely underestimate the full extent of workplace events. 10 In our dataset, 81 occupations were highly exposed to ES including drafting occupations (217), guards and police, excutive public service (426), cooks (436), janitors and cleaners (453), plumbers, pipefitters and steamfitters (558), miscellaneous machine operators (777), construction laborers (869) and miscellaneous laborers except construction (889). Severe ES may cause someone, to modify their work practices to reduce ES severity, or to seek a new job entirely and avoid repeated, perhaps less severe ES.…”

Section: Discussionmentioning

confidence: 99%

“…For ES, three pre-assigned categories were used: low, medium and high, based on the probability of incurring ES on the job. 10 When examining high exposure category for grouped occupations, we combined medium and low into the reference for ES and MF, to have sufficient numbers in each category.…”

Section: Exposure Assessmentmentioning

confidence: 99%

“…10,13 Using an a priori cutoff, we categorized MF exposures into a reference group (or low exposure) less than 0.1 mT, medium (0.1 mT-0.3 mT) and high (0.3 mT or greater) exposure categories. For ES, three pre-assigned categories were used: low, medium and high, based on the probability of incurring ES on the job.…”

Section: Exposure Assessmentmentioning

confidence: 99%

“…Using ES and MF job-exposure matrices (JEM) developed for US mortality data, 10 we present the first attempt to examine the association between occupational ES, extremely low-frequency MF and ALS.…”

Section: Introductionmentioning

confidence: 99%

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Case-control study of occupational exposure to electric shocks and magnetic fields and mortality from amyotrophic lateral sclerosis in the US, 1991–1999

Vergara

Mezei

Kheifets

2014

J Expo Sci Environ Epidemiol

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We investigated the relationship between occupational exposure to electric shocks (ES) and magnetic fields (MF) and amyotrophic lateral sclerosis (ALS) using 1991-1999 US mortality data. For each of the 5886 included ALS deaths, 10 controls-matched on sex-, age-, year- and region-were selected from among other deaths. Usual occupation as reported on death certificates was linked to job-exposure matrices for ES and MF. Education and electric occupations were associated with moderately increased ALS risks (odds ratio (OR)=1.85, 95% confidence interval (CI)=1.67, 2.04; OR=1.23, 95% CI=1.04, 1.47, respectively). For ES, ALS mortality OR were 0.73 (95% CI=0.67, 0.79) for high and 0.90 (95% CI=0.84, 0.97) for medium exposure compared with low exposure. For MF, ALS ORs were 1.09 (95% CI=1.00, 1.19) for high and 1.09 (95% CI=0.96, 1.23) for medium exposure as compared with low exposure. For electric occupations, ALS ORs were insensitive to adjustments for ES, MF or both. Consistent with previous publications, an association between electric occupations and ALS was observed. Findings do not support occupational exposure to ES or MF as an explanation.

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Section: Discussionmentioning

confidence: 99%

Section: Exposure Assessmentmentioning

confidence: 99%

Section: Exposure Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Case-control study of occupational exposure to electric shocks and magnetic fields and mortality from amyotrophic lateral sclerosis in the US, 1991–1999

Vergara

Mezei

Kheifets

2014

J Expo Sci Environ Epidemiol

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“…In this way, titles of occupational groups have been used as a proxy for exposure to, for example, pesticides, solvents, metals or asbestos 2–5. More recently, JEMs have been developed for physical exposures related to the generation, transmission, distribution and use of electricity (ie, especially to magnetic fields) 6 – 8…”

Section: Introductionmentioning

confidence: 99%

Electric shocks at work in Europe: development of a job exposure matrix

et al. 2012

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Occupational Exposure to Extremely Low‐Frequency Magnetic Fields and Risk of Amyotrophic Lateral Sclerosis: Results of a Feasibility Study for a Pooled Analysis of Original Data

Baaken

Dechent

Blettner

et al. 2021

Bioelectromagnetics

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Previous meta-analyses have suggested an increased risk of amyotrophic lateral sclerosis (ALS) associated with occupational exposure to extremely low-frequency magnetic fields (ELF-MF). However, results should be interpreted with caution since studies were methodologically heterogeneous. Here, we assessed the feasibility of a pooling study to harmonize and re-analyze available original data. A systematic literature search was conducted. Published epidemiological studies were identified in PubMed and EMF-Portal from literature databases′ inception dates until January 2019. The characteristics of all studies were described, including exposure metrics, exposure categories, and confounders. A survey among the principal investigators (PI) was carried out to assess their willingness to provide their original data. The statistical power of a pooling study was evaluated. We identified 15 articles published between 1997 and 2019. Studies differed in terms of outcome, study population, exposure assessment, and exposure metrics. Most studies assessed ELF-MF as average magnetic flux density per working day; however, exposure categories varied widely. The pattern of adjustment for confounders was heterogeneous between studies, with age, sex, and socioeconomic status being most frequent. Eight PI expressed their willingness to provide original data. A relative risk of ≥1.14 for ALS and occupational exposure to ELF-MF can be detected with a power of more than 80% in a pooled study. The pooling of original data is recommended and could contribute to a better understanding of ELF-MF in the etiology of ALS based on a large database and reduced heterogeneity due to a standardized analysis protocol with harmonized exposure metrics and exposure categories.

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New electric‐shock job exposure matrix

Abstract: Combining publicly available data with an expert panel is a viable method to construct an electric-shock MF JEM. This JEM will allow an evaluation of association between electric shocks and neurodegenerative diseases.

Cited by 12 publications

References 28 publications

Case-control study of occupational exposure to electric shocks and magnetic fields and mortality from amyotrophic lateral sclerosis in the US, 1991–1999

Case-control study of occupational exposure to electric shocks and magnetic fields and mortality from amyotrophic lateral sclerosis in the US, 1991–1999

Electric shocks at work in Europe: development of a job exposure matrix

Occupational Exposure to Extremely Low‐Frequency Magnetic Fields and Risk of Amyotrophic Lateral Sclerosis: Results of a Feasibility Study for a Pooled Analysis of Original Data

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