[Risk of electromagnetic fields in control board and switchboard rooms at petrochemical plants].

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "occupational",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Operators in control board and switchboard rooms at petrochemical plants",
  "sample_size": null,
  "outcomes": [
    "Measured electromagnetic field exposure levels (5–30,000 Hz)",
    "Assessment versus international guideline limits",
    "Conclusion regarding adverse effects risk"
  ],
  "main_findings": "Electromagnetic field exposure was evaluated in control board and switchboard rooms at petrochemical plants across 5–30,000 Hz. Based on measured values and comparison with international guidelines, the authors conclude operators should be exposed without adverse effects.",
  "effect_direction": "no_effect",
  "limitations": [
    "No sample size reported in abstract",
    "No quantitative exposure measurements provided in abstract",
    "Health outcomes were not directly measured; conclusion is based on comparison to guidelines"
  ],
  "evidence_strength": "low",
  "confidence": 0.72,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "occupational exposure",
    "petrochemical plants",
    "control board rooms",
    "switchboard rooms",
    "guidelines",
    "5-30000 Hz"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.9,
      "reason": "Exposure assessment in workplace settings (petrochemical plant control/switchboard rooms)."
    }
  ]
}