Amyotrophic lateral sclerosis, occupational exposure to extremely low frequency magnetic fields and electric shocks: a systematic review and meta-analysis
Abstract
Exposure to extremely low frequency magnetic fields (ELF-MF) and electric shocks occurs in many workplaces and occupations but it is unclear whether any of these exposures cause Amyotrophic lateral sclerosis (ALS). The aim of this systematic review and meta-analysis is to explore whether occupational exposure to ELF-MF and/or electric shocks are risk factor for ALS. We searched PubMed, Embase, and Web of Science databases up to the end of 2019. Pooled risk estimates were calculated using random-effects meta-analysis including exploration of the sources of heterogeneity between studies and publication bias. Twenty-seven publications fulfilled the inclusion criteria. We found a weak, significant, association between occupational exposure to ELF-MF and the risk of ALS (RRPooled estimate: 1.20; 95%CI: 1.05, 1.38) with moderate to high heterogeneity (I2=66.3%) and indication of publication bias (PEgger’s test=0.03). No association was observed between occupational exposure to electric shocks and risk of ALS (RRPooled estimate: 0.97; 95%CI: 0.80, 1.17) with high heterogeneity (I2=80.5%), and little indication for publication bias (PEgger’s test=0.24). The findings indicate that occupational exposure to ELF-MF, but not electric shocks, might be a risk factor for ALS. However, given the moderate to high heterogeneity and potential publication bias, the results should be interpreted with caution.
Funding source: Alborz University of Medical Sciences
Award Identifier / Grant number: 1396-02-22-1532
Acknowledgment
The authors would like to thank Research Consultation Center (RCC) at Shiraz University of Medical Sciences for their invaluable assistance in editing this manuscript.
Research funding: This work was supported by Alborz University of Medical Sciences, Karaj, Iran (grant number 1396-02-22-1532).
Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: Authors state no conflict of interest.
Informed consent: Informed consent is not applicable.
Ethical approval: The conducted research is not related to either human or animal use.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/REVEH-2020-0041).
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Artikel in diesem Heft
- Frontmatter
- Mini Reviews
- Implication of coronavirus pandemic on obsessive-compulsive-disorder symptoms
- Influence of particulate matter on human health in selected African provinces: mini-review
- Evaluation of potential gastrointestinal carcinogenicity associated with the ingestion of asbestos
- Balancing incomplete COVID-19 evidence and local priorities: risk communication and stakeholder engagement strategies for school re-opening
- Review Articles
- A scoping review of sources of mercury and its health effects among Pakistan’s most vulnerable population
- Urban aquaponics farming and cities- a systematic literature review
- Systematic review: the impact of socioeconomic factors on Aedes aegypti mosquito distribution in the mainland United States
- Deoxyribonucleic acid (DNA) methylation in children exposed to air pollution: a possible mechanism underlying respiratory health effects development
- The use of indoor plant as an alternative strategy to improve indoor air quality in Indonesia
- Environmental exposures to endocrine disrupting chemicals (EDCs) and their role in endometriosis: a systematic literature review
- An investigation of the effects of environmental and ecologic factors on cutaneous leishmaniasis in the old world: a systematic review study
- Amyotrophic lateral sclerosis, occupational exposure to extremely low frequency magnetic fields and electric shocks: a systematic review and meta-analysis
- Letter to the Editor
- Climate engineering: a strategic approach to combat environmental potential risks associated with Pak-China Economic corridor (CPEC) Development