8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Cancer & Tumors475 citations

Exposure to residential electric and magnetic fields and risk of childhood leukemia

Bioeffects Seen

Authors not listed · 1991

Share:

Children in homes with high-current electrical wiring faced double the leukemia risk despite normal EMF readings.

Plain English Summary

Summary written for general audiences

Researchers studied 232 children with leukemia and 232 healthy controls in Los Angeles County, measuring magnetic and electric fields in their homes and analyzing electrical wiring configurations. While direct EMF measurements showed no clear cancer risk, children living in homes with high-current electrical wiring had more than double the leukemia risk compared to those in low-EMF wiring configurations.

Why This Matters

This 1991 study represents a pivotal moment in EMF research, revealing a troubling pattern that continues to challenge our understanding of electromagnetic exposure risks. The finding that wiring configuration predicted childhood leukemia risk better than actual field measurements suggests we may be missing something fundamental about how EMF exposure works in real-world settings. What makes this particularly significant is that high-current wiring configurations create the kind of variable, intermittent magnetic field exposure that characterizes modern homes filled with electronic devices. The science demonstrates that our current measurement approaches may not capture the full picture of EMF health risks, especially for our most vulnerable population - children.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (1991). Exposure to residential electric and magnetic fields and risk of childhood leukemia.
Show BibTeX
@article{exposure_to_residential_electric_and_magnetic_fields_and_risk_of_childhood_leukemia_ce1619,
  author = {Unknown},
  title = {Exposure to residential electric and magnetic fields and risk of childhood leukemia},
  year = {1991},
  doi = {10.1093/OXFORDJOURNALS.AJE.A116176},
  
}

Quick Questions About This Study

Yes, children in homes with very high current wiring configurations had 2.15 times higher leukemia risk compared to those in very low current or underground wiring, even after accounting for other factors.
The study found no clear association between measured magnetic or electric field levels and leukemia risk, suggesting that wiring configuration may capture exposure patterns that single measurements miss.
It's a classification system that categorizes homes based on electrical wiring types and proximity to power lines, ranking them from very low to very high current configurations as a proxy for EMF exposure.
Cases were more likely than controls to report using several high EMF-producing appliances, though the study doesn't specify which appliances or quantify the increased risk from appliance use alone.
Magnetic field measurements were taken continuously in children's bedrooms for 24 hours or longer, providing a more comprehensive assessment than brief spot measurements used in earlier studies.