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Reanalysis of risks of childhood leukemia with distance from overhead power lines in the UK

2018 · Mixed · Low evidence

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MixedLow evidencePaper 2093

The authors re-analysed their previous UK study using finer distance categories. In the 1960s and 1970s, when an elevated risk was principally found, risk did not decrease monotonically with distance and showed a maximum at 100–200 m. The authors state this w…

Study snapshot

Publicationmanual · 2018
Study typecase_control
Reported directionMixed
Evidence ratingLow

Abstract

Reanalysis of risks of childhood leukemia with distance from overhead power lines in the UK Swanson J, Bunch K. Reanalysis of risks of childhood leukaemia with distance from overhead power lines in the UK. J Radiol Prot. 2018 May 30. doi: 10.1088/1361-6498/aac89a. Abstract Our previous study of childhood leukaemia and distance to high-voltage overhead power lines in the UK has been included in an international pooled analysis. That pooled analysis used different distance categories to us, which has focussed attention on the effect of that choice. We re-analyse our previous subjects, using finer distance categories. In the 1960s and 1970s, when we principally found an elevated risk, the risk did not fall monotonically with distance from the power line but had a maximum at 100-200 m. This weakens the evidence that any elevated risks are related to magnetic fields, and slightly strengthens the evidence for a possible effect involving residential mobility or other socioeconomic factors. ncbi.nlm.nih.gov

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typecase_control
Effect directionmixed
PopulationChildren in the UK (childhood leukaemia subjects from a previous study)
Sample sizeNot supplied
ExposureELF
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

The authors re-analysed their previous UK study using finer distance categories. In the 1960s and 1970s, when an elevated risk was principally found, risk did not decrease monotonically with distance and showed a maximum at 100–200 m. The authors state this weakens evidence that elevated risks are related to magnetic fields and slightly strengthens evidence for alternative explanations such as residential mobility or socioeconomic factors.

Outcomes measured

  • childhood leukaemia
  • risk by residential distance to high-voltage overhead power lines

Limitations

  • Sample size not reported in the abstract
  • Exposure metric is distance to power lines rather than direct magnetic-field measurements
  • Findings highlighted as weak evidence and potentially influenced by non-EMF factors (e.g., mobility, socioeconomic factors)
View raw extracted JSON
{
  "study_type": "case_control",
  "exposure": {
    "band": "ELF",
    "source": "overhead power lines",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Children in the UK (childhood leukaemia subjects from a previous study)",
  "sample_size": null,
  "outcomes": [
    "childhood leukaemia",
    "risk by residential distance to high-voltage overhead power lines"
  ],
  "main_findings": "The authors re-analysed their previous UK study using finer distance categories. In the 1960s and 1970s, when an elevated risk was principally found, risk did not decrease monotonically with distance and showed a maximum at 100–200 m. The authors state this weakens evidence that elevated risks are related to magnetic fields and slightly strengthens evidence for alternative explanations such as residential mobility or socioeconomic factors.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in the abstract",
    "Exposure metric is distance to power lines rather than direct magnetic-field measurements",
    "Findings highlighted as weak evidence and potentially influenced by non-EMF factors (e.g., mobility, socioeconomic factors)"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "childhood leukaemia",
    "childhood leukemia",
    "overhead power lines",
    "high-voltage",
    "distance categories",
    "UK",
    "magnetic fields",
    "residential mobility",
    "socioeconomic factors"
  ],
  "suggested_hubs": [
    {
      "slug": "power-lines-elf",
      "weight": 0.95,
      "reason": "Study examines childhood leukaemia risk by distance from high-voltage overhead power lines (ELF context)."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1088/1361-6498/aac89a
PubMed: Not supplied

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