Comparison of a radiofrequency electric and magnetic field source-based job-exposure matrix with personal radiofrequency exposure measurements.

Abstract

OBJECTIVES: Assessing occupational exposure to radiofrequency electromagnetic fields (RF-EMF) presents significant challenges due to the considerable variability in exposure levels within and between occupations. This spatial and temporal variability complicates the reliable evaluation of potential health risks associated with RF-EMF exposure in the workplace. Accurate assessment methods are crucial to understand the extent of exposure and to evaluate potential health risks, especially given the potential for higher exposures in occupational settings compared to the general population. This study compares the historical RF-EMF exposure estimates in the INTEROCC RF-EMF job-exposure matrix (RF-JEM) with recent personal measurement data collected in 2 countries as part of the OccRF-Health study, to assess the broader applicability of the RF-JEM. METHODS: Weighted kappa (kw) coefficients and Spearman rank correlation tests were performed to assess the alignment between RF-JEM estimates and measurements for 8 h time-weighted average exposure intensity and prevalence estimates across various occupations. The comparisons were mainly based on 22 jobs having ≥5 measured workers in the OccRF-Health study. RESULTS: Poor agreement was found for both exposure prevalence and intensity between both methods (kw < 0.1). RF-JEM values likely overestimated exposure levels for both electric (E) and magnetic (H) fields (mean percentage difference >194%) compared to current personal measurements. CONCLUSIONS: Findings suggest that the INTEROCC-JEM likely overestimates current exposure intensity levels in the measured jobs. Adopting a semiquantitative JEM could also mitigate misclassification errors due to exposure variability, improving accuracy in exposure assessment. These findings indicate the need for more targeted personal measurements, including among highly exposed workers, and for potentially considering new exposure metrics to more accurately assess occupational RF-EMF exposures in occupational epidemiological research.

AI evidence extraction

Main findings

Agreement between RF-JEM estimates and personal measurements was poor for both exposure prevalence and intensity (weighted kappa < 0.1). RF-JEM values likely overestimated current exposure levels for both electric and magnetic fields (mean percentage difference >194%) compared with recent personal measurements.

Outcomes measured

• Agreement between INTEROCC RF-EMF job-exposure matrix (RF-JEM) estimates and personal RF-EMF measurements (prevalence and intensity)
• Weighted kappa agreement for exposure prevalence and intensity
• Spearman rank correlation between RF-JEM estimates and measurements
• Mean percentage difference between RF-JEM and personal measurements for electric (E) and magnetic (H) fields

Limitations

• Personal measurement comparisons were mainly based on 22 jobs with ≥5 measured workers
• Study compares historical JEM estimates with recent measurements, which may reflect temporal changes in workplace RF-EMF sources/exposures
• Frequency range and specific RF sources are not described in the abstract
• Total number of measured workers is not reported in the abstract

Suggested hubs

• occupational-exposure (0.95)
  Study evaluates occupational RF-EMF exposure assessment by comparing a job-exposure matrix with personal measurements.

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    "study_type": "exposure_assessment",
    "exposure": {
        "band": "RF",
        "source": "occupational",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "8 h time-weighted average"
    },
    "population": "Workers in various occupations in 2 countries (OccRF-Health study); comparison focused on 22 jobs with ≥5 measured workers",
    "sample_size": null,
    "outcomes": [
        "Agreement between INTEROCC RF-EMF job-exposure matrix (RF-JEM) estimates and personal RF-EMF measurements (prevalence and intensity)",
        "Weighted kappa agreement for exposure prevalence and intensity",
        "Spearman rank correlation between RF-JEM estimates and measurements",
        "Mean percentage difference between RF-JEM and personal measurements for electric (E) and magnetic (H) fields"
    ],
    "main_findings": "Agreement between RF-JEM estimates and personal measurements was poor for both exposure prevalence and intensity (weighted kappa < 0.1). RF-JEM values likely overestimated current exposure levels for both electric and magnetic fields (mean percentage difference >194%) compared with recent personal measurements.",
    "effect_direction": "unclear",
    "limitations": [
        "Personal measurement comparisons were mainly based on 22 jobs with ≥5 measured workers",
        "Study compares historical JEM estimates with recent measurements, which may reflect temporal changes in workplace RF-EMF sources/exposures",
        "Frequency range and specific RF sources are not described in the abstract",
        "Total number of measured workers is not reported in the abstract"
    ],
    "evidence_strength": "moderate",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "RF-EMF",
        "occupational exposure",
        "job-exposure matrix",
        "INTEROCC",
        "OccRF-Health",
        "personal measurements",
        "electric field",
        "magnetic field",
        "weighted kappa",
        "Spearman correlation",
        "exposure misclassification"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.9499999999999999555910790149937383830547332763671875,
            "reason": "Study evaluates occupational RF-EMF exposure assessment by comparing a job-exposure matrix with personal measurements."
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}

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