Residential distance from high-voltage overhead power lines and risk of Alzheimer's dementia and Parkinson's disease: population-based case-control study
← Research streamCompared with residents living ≥600 m from high-voltage overhead power lines, residents living <50 m had OR 1.11 (95% CI 0.95–1.30) for Alzheimer's dementia and OR 1.09 (95% CI 0.92–1.30) for Parkinson's disease. The authors describe this as a weak associatio…
Study snapshot
Abstract
Residential distance from high-voltage overhead power lines and risk of Alzheimer's dementia and Parkinson's disease: population-based case-control study Gervasi F, Murtas R, Decarli A, Giampiero Russo A. Residential distance from high-voltage overhead power lines and risk of Alzheimer's dementia and Parkinson's disease: a population-based case-control study in a metropolitan area of Northern Italy. Int J Epidemiol. 2019 Jul 6. pii: dyz139. doi: 10.1093/ije/dyz139. Abstract BACKGROUND: The association between the extremely low-frequency magnetic field generated by overhead power lines and neurodegenerative disease is still a matter of debate. METHODS: A population-based case-control study was carried out on the residents in the Milan metropolitan area between 2011 and 2016 to evaluate the possible association between exposure to extremely low- frequency magnetic fields generated by high-voltage overhead power lines and Alzheimer's dementia and Parkinson's disease. A statistical analysis was performed on cases and controls matched by sex, year of birth and municipality of residence (with a case to controls ratio of 1 : 4) using conditional logistic regression models adjusted for socio-economic deprivation and distance from the major road network as potential confounders. RESULTS: Odds ratios for residents <50 m from the source of exposure compared with residents at ≥600 m turned out to be 1.11 (95% confidence interval: 0.95-1.30) for Alzheimer's dementia and 1.09 (95% confidence interval: 0.92-1.30) for Parkinson's disease. CONCLUSIONS: The finding of a weak association between exposure to the extremely low-frequency magnetic field and neurodegenerative diseases suggests the continuation of research on this topic. Moreover, the low consistency between the results of the already existing studies emphasises the importance of increasingly refined study designs. The results of this study do not disprove the hypothesis that the ELF-MF generated by high-voltage overhead power lines can increase the risk of Alzheimer's dementia and, to a lesser extent, Parkinson's disease. The repeated suggestions regarding the existence of an association between ELF-MF and neurodegenerative diseases, both for residential exposures and for occupational exposures, constitute an incentive to continue the evaluation through the planning of specific studies. The lack of univocal and definitive results emphasizes, however, the need to adopt, for this specific field of investigation, increasingly rigorous experimental designs, with particular reference to the selection of study subjects, the quantification of exposure and the definition of confounders. ncbi.nlm.nih.gov
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.
Main findings
Compared with residents living ≥600 m from high-voltage overhead power lines, residents living <50 m had OR 1.11 (95% CI 0.95–1.30) for Alzheimer's dementia and OR 1.09 (95% CI 0.92–1.30) for Parkinson's disease. The authors describe this as a weak association and note inconsistency across existing studies.
Outcomes measured
- Alzheimer's dementia
- Parkinson's disease
Limitations
- Exposure assessed via residential distance to power lines (no direct ELF-MF measurements reported in abstract)
- Observational case-control design; potential residual confounding despite adjustment for socio-economic deprivation and distance from major road network
- Low consistency with prior studies noted by authors
View raw extracted JSON
{
"study_type": "case_control",
"exposure": {
"band": "ELF",
"source": "high-voltage overhead power lines (residential proximity)",
"frequency_mhz": null,
"sar_wkg": null,
"duration": "Residents in Milan metropolitan area between 2011 and 2016; exposure proxied by residential distance to power lines"
},
"population": "Residents in the Milan metropolitan area (Northern Italy), 2011–2016",
"sample_size": null,
"outcomes": [
"Alzheimer's dementia",
"Parkinson's disease"
],
"main_findings": "Compared with residents living ≥600 m from high-voltage overhead power lines, residents living <50 m had OR 1.11 (95% CI 0.95–1.30) for Alzheimer's dementia and OR 1.09 (95% CI 0.92–1.30) for Parkinson's disease. The authors describe this as a weak association and note inconsistency across existing studies.",
"effect_direction": "unclear",
"limitations": [
"Exposure assessed via residential distance to power lines (no direct ELF-MF measurements reported in abstract)",
"Observational case-control design; potential residual confounding despite adjustment for socio-economic deprivation and distance from major road network",
"Low consistency with prior studies noted by authors"
],
"evidence_strength": "low",
"confidence": 0.78,
"peer_reviewed_likely": "yes",
"keywords": [
"extremely low-frequency magnetic field",
"ELF-MF",
"high-voltage overhead power lines",
"residential exposure",
"distance to power lines",
"Alzheimer's dementia",
"Parkinson's disease",
"population-based case-control",
"Italy",
"Milan"
],
"suggested_hubs": [
{
"slug": "occupational-exposure",
"weight": 0.2,
"reason": "Occupational exposure is mentioned in the discussion as part of the broader evidence base, though this study is residential."
}
]
}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: 10.1093/ije/dyz139
PubMed: Not supplied
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