Environmental power-frequency magnetic fields and suicide

{
  "study_type": "ecological",
  "exposure": {
    "band": "ELF",
    "source": "environmental",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "1969–76"
  },
  "population": "Suicidal deaths (locations) in the West Midlands, England",
  "sample_size": null,
  "outcomes": [
    "suicide (location of suicidal deaths)"
  ],
  "main_findings": "In the West Midlands (England) during 1969–76, suicide locations were significantly correlated with measured power-frequency magnetic field strength, with more suicides occurring at locations with high magnetic field strength.",
  "effect_direction": "harm",
  "limitations": [
    "Study design based on correlation between locations and measured field strength; causality cannot be determined from the abstract.",
    "No sample size or adjustment for potential confounders described in the abstract.",
    "Exposure characterization details (frequency, measurement methods, timing relative to deaths) not provided in the abstract."
  ],
  "evidence_strength": "very_low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "power-frequency",
    "ELF magnetic fields",
    "environmental exposure",
    "suicide",
    "spatial correlation",
    "West Midlands",
    "England"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.15,
      "reason": "Mentions environmental power-frequency magnetic fields; no clear occupational setting stated, so only weak relevance."
    }
  ]
}