[Evaluation of the genotoxicity of the extremely low frequency-magnetic fields (ELF-MF) in workers exposed for professional reasons].

Giornale italiano di medicina del lavoro ed ergonomia · 2007 · No effect · Low evidence

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No effectLow evidencePaper 3399

Study snapshot

PublicationGiornale italiano di medicina del lavoro ed ergonomia · 2007

Study typecohort

Reported directionNo effect

Evidence ratingLow

Abstract

Whether or not ELF-MF has genotoxic potential is a controversial issue. In the present study, we investigated the genotoxic effect using cytogenetic assays (CA - SCE - MN), in 109 workers exposed to ELF-MF. The mean value of occupational exposure in the whole group was 0.35 microT. According to the exposure level the workers were stratified in two different groups: low exposed (n. 39, TWA < or = 0.2 microT) and higher exposed (n. 70; TWA > 0.2 microT): the groups did not significantly differ for the examined variables. Due to these results we decided to re-evaluate the effect only considering the highest exposed workers: we selected 31 workers exposed to TWA levels exceeding 1 microT, and compared vs. the low exposed subjects: again, the difference in the groups examined were not significant. At multivariate regression analysis was also applied: no correlation was observed with cytogenetic biomarkers. The results of this study does not support the hypothesis of any direct genotoxic effect of ELF-MF, at least at the environmental levels currently found in an occupational settings.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typecohort

Effect directionno_effect

PopulationWorkers occupationally exposed to extremely low frequency magnetic fields (ELF-MF)

Sample size109

ExposureELF

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In 109 workers (mean occupational exposure 0.35 microT), cytogenetic biomarkers (CA, SCE, MN) did not differ significantly between low-exposed (TWA ≤0.2 microT) and higher-exposed (TWA >0.2 microT) groups. A comparison of the highest-exposed subgroup (n=31; TWA >1 microT) versus low-exposed workers also found no significant differences, and multivariate regression showed no correlation between exposure and cytogenetic biomarkers.

Outcomes measured

Cytogenetic assays (CA)
Sister chromatid exchange (SCE)
Micronucleus test (MN)

Limitations

Frequency of ELF-MF not reported
Exposure duration/time in job not reported
Details of cytogenetic assay results (effect sizes/values) not provided in abstract
Potential confounding control variables not specified beyond mention of multivariate regression

View raw extracted JSON

{
  "study_type": "cohort",
  "exposure": {
    "band": "ELF",
    "source": "occupational",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Workers occupationally exposed to extremely low frequency magnetic fields (ELF-MF)",
  "sample_size": 109,
  "outcomes": [
    "Cytogenetic assays (CA)",
    "Sister chromatid exchange (SCE)",
    "Micronucleus test (MN)"
  ],
  "main_findings": "In 109 workers (mean occupational exposure 0.35 microT), cytogenetic biomarkers (CA, SCE, MN) did not differ significantly between low-exposed (TWA ≤0.2 microT) and higher-exposed (TWA >0.2 microT) groups. A comparison of the highest-exposed subgroup (n=31; TWA >1 microT) versus low-exposed workers also found no significant differences, and multivariate regression showed no correlation between exposure and cytogenetic biomarkers.",
  "effect_direction": "no_effect",
  "limitations": [
    "Frequency of ELF-MF not reported",
    "Exposure duration/time in job not reported",
    "Details of cytogenetic assay results (effect sizes/values) not provided in abstract",
    "Potential confounding control variables not specified beyond mention of multivariate regression"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-MF",
    "extremely low frequency",
    "magnetic fields",
    "occupational exposure",
    "genotoxicity",
    "cytogenetics",
    "CA",
    "SCE",
    "micronucleus",
    "TWA",
    "microtesla"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.95,
      "reason": "Study evaluates genotoxicity biomarkers in workers exposed to ELF magnetic fields at work."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 18409756

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