Electrical wiring configurations and childhood cancer

{
  "study_type": "case_control",
  "exposure": {
    "band": "ELF",
    "source": "residential electrical wiring",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Children in Colorado; cases were children who developed cancer and controls were control children (1976–1977).",
  "sample_size": null,
  "outcomes": [
    "childhood cancer"
  ],
  "main_findings": "Homes of children who developed cancer had an excess of electrical wiring configurations suggestive of high current-flow compared with control children’s homes. The association was strongest among children who had lived their entire lives at the same address and appeared dose-related; it did not seem attributable to neighborhood, street congestion, social class, or family structure.",
  "effect_direction": "harm",
  "limitations": [
    "Reason for the correlation is stated as uncertain in the abstract.",
    "Exposure characterized by wiring configuration suggestive of high current-flow rather than direct field measurements (as described in abstract).",
    "Sample size and specific cancer types are not provided in the abstract."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electrical wiring configurations",
    "high current-flow",
    "residential exposure",
    "AC magnetic fields",
    "water pipes",
    "childhood cancer",
    "Colorado"
  ],
  "suggested_hubs": [
    {
      "slug": "childhood-cancer",
      "weight": 0.9,
      "reason": "Study compares wiring configurations near homes of children with cancer vs controls."
    },
    {
      "slug": "elf-emf",
      "weight": 0.75,
      "reason": "Abstract suggests possible effects of AC magnetic fields related to wiring/current-flow."
    }
  ]
}