8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Brain & Nervous System

Magnetic fields of transmission lines and depression

Bioeffects Seen

Authors not listed · 1997

Share:

Living within 100 meters of high-voltage power lines increases severe depression risk nearly five-fold.

Plain English Summary

Summary written for general audiences

Finnish researchers studied 12,063 people living near high-voltage power lines and found that while general depression levels weren't affected, those living within 100 meters of transmission lines had a 4.7-fold increased risk of severe depression. The study tracked participants for 20 years and used standardized depression assessments.

Why This Matters

This Finnish study stands out in the EMF research landscape because it combined rigorous exposure assessment with standardized mental health measures over two decades. The 4.7-fold increase in severe depression risk for those living within 100 meters of transmission lines represents one of the strongest statistical associations found in EMF health research. What makes this particularly concerning is that transmission line magnetic fields are typically much weaker than what you experience from household appliances, yet the chronic, continuous exposure appears to create measurable health impacts. The researchers' call for better understanding of exposure characteristics suggests even they were surprised by the magnitude of the effect they documented.

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 (1997). Magnetic fields of transmission lines and depression.
Show BibTeX
@article{magnetic_fields_of_transmission_lines_and_depression_ce1578,
  author = {Unknown},
  title = {Magnetic fields of transmission lines and depression},
  year = {1997},
  doi = {10.1093/OXFORDJOURNALS.AJE.A009232},
  
}
DOI: 10.1093/OXFORDJOURNALS.AJE.A009232PubMed: 9420528

Quick Questions About This Study

Yes, this Finnish study found people living within 100 meters of high-voltage transmission lines had a 4.7-fold increased risk of severe depression compared to those living farther away, though general depression levels weren't affected.
Researchers tracked participants for 20 years, examining their residential history and proximity to 110-400 kilovolt power lines before assessing depression symptoms using the standardized Beck Depression Inventory in 1990.
The increased risk of severe depression was found specifically among people living within 100 meters of high-voltage transmission lines. Those living farther away didn't show the same elevated risk levels.
The study included 12,063 participants from the Finnish Twin Cohort Study who completed depression assessments. Researchers combined this with exposure data from the Finnish Transmission Line Cohort Study for comprehensive analysis.
Researchers suggest electromagnetic fields may contribute to depression by disrupting the pineal gland, which produces melatonin and helps regulate mood and sleep cycles. This biological mechanism could explain the observed association.