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Cancer & Tumors135 citations

Leukaemia and residence near electricity transmission equipment: a case-control study

No Effects Found

Authors not listed · 1989

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This study found no significant leukemia association near overhead power lines: a relative risk of 2.0 within 50 meters, with a 95% CI of 0.4-9.0.

Plain English Summary

Summary written for general audiences

This study examined whether living near power lines and electrical substations increases leukemia risk in southeast England. Researchers found a relative risk of 2.0 for leukemia within 50 meters of overhead power lines, but the confidence interval was wide (95% CI 0.4-9.0), so the result was not statistically significant. The study found no significant association between residential proximity to electrical infrastructure and leukemia risk.

Why This Matters

This population-based case-control study examined leukemia risk near electrical infrastructure, using 771 leukemia cases and 1,432 cancer controls. The relative risk of 2.0 within 50 meters of power lines came with a wide confidence interval (95% CI 0.4-9.0), so it was not statistically significant. What makes this particularly relevant is that it examined real-world residential exposures rather than occupational settings. Only 0.6% of subjects lived within 100 meters of an overhead power line, which left few exposed subjects to compare. The researchers' use of distance as a proxy for magnetic field exposure was methodologically sound for its time, though direct field measurements would become standard in later studies. The study found no significant association between residential proximity to electrical equipment and leukemia, with a relative risk of 0.99 for residence within 100 meters of a substation.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50-60 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50-60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (1989). Leukaemia and residence near electricity transmission equipment: a case-control study.
Show BibTeX
@article{leukaemia_and_residence_near_electricity_transmission_equipment_a_case_control_study_ce1621,
  author = {Unknown},
  title = {Leukaemia and residence near electricity transmission equipment: a case-control study},
  year = {1989},
  doi = {10.1038/bjc.1989.362},
  
}
DOI: 10.1038/bjc.1989.362PubMed: 2486298

Quick Questions About This Study

This study found a relative risk of 2.0 for people living within 50 meters of overhead power lines (95% CI 0.4-9.0), which was not statistically significant. The small number of cases near power lines made the results statistically uncertain.
The study found a prevalence ratio of 1.5 for children under 18 living within 50 meters of electrical substations compared with adults (95% CI 0.7-3.4), which was not statistically significant. Over 40% of study participants lived within 100 meters of a substation.
Only 0.6% of study participants lived within 100 meters of overhead power lines. The relative risk of leukemia within 100 meters of overhead power lines was 1.45 (95% CI 0.54-3.88), which was not statistically significant.
Not clearly. Children under 18 living within 50 meters of a substation had a higher relative risk of leukemia than adults, but the difference was not statistically significant. The prevalence ratio was 1.5 (95% CI 0.7-3.4).
Researchers used distance, equipment type, and electrical loading as indirect measures of magnetic field exposure. They assessed the potential for power frequency magnetic field exposure from nearby electrical infrastructure rather than direct measurements.