[Levels of occupational exposure to extremely low frequency magnetic fields among workers in different jobs].

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "occupational",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Workers employed in 28 different occupations",
  "sample_size": 150,
  "outcomes": [
    "Occupational exposure levels to extremely low frequency magnetic fields (ELF-MF) measured with personal dosimeters (microT)",
    "Variability of exposure within occupation and within worker across days"
  ],
  "main_findings": "Personal dosimeter measurements in 150 workers across 28 occupations found an overall arithmetic mean ELF-MF exposure of 0.36 microT and geometric mean of 0.21 microT. High variability was observed among workers in the same occupation and across different days for the same worker; most workers had relatively low exposure, but some had higher measured levels.",
  "effect_direction": "unclear",
  "limitations": [
    "No frequencies, measurement duration, or sampling strategy details provided in the abstract",
    "No breakdown of exposure levels by specific occupation reported in the abstract",
    "No information on dosimeter model, calibration, or measurement protocol in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-MF",
    "extremely low frequency",
    "magnetic fields",
    "occupational exposure",
    "personal dosimeters",
    "microtesla",
    "exposure variability"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.95,
      "reason": "Measures ELF magnetic-field exposure levels in workers across multiple occupations using personal dosimeters."
    }
  ]
}