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Risk factors for leukemia in Thailand

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Authors not listed · 2009

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Thai study links GSM cell phone use to doubled leukemia risk and power line work to 4-fold higher risk.

Plain English Summary

Summary written for general audiences

Researchers in Bangkok studied 180 adult leukemia patients compared to 756 healthy controls to identify disease risk factors. They found suggestive evidence that GSM cell phone use doubled leukemia risk, while working near power lines increased myeloid leukemia risk by over 4 times. The study also confirmed strong associations with chemical exposures like benzene and pesticides.

Why This Matters

This Thai case-control study adds important evidence to the EMF-leukemia debate, particularly because it examined both radiofrequency (cell phones) and extremely low frequency (power lines) exposures in the same population. The 2.1-fold increased risk for GSM users is noteworthy given that GSM operates at 900-1800 MHz frequencies still widely used today. More striking is the 4.3-fold increased risk for working near power lines, which aligns with decades of research linking ELF magnetic fields to blood cancers. What makes this study particularly relevant is that cell phone usage was relatively new in Thailand during the study period, potentially capturing early biological effects before adaptive mechanisms develop. The researchers' finding that certain usage practices showed even higher risks (up to 3-fold) suggests dose-response relationships that strengthen causal inference.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2009). Risk factors for leukemia in Thailand.
Show BibTeX
@article{risk_factors_for_leukemia_in_thailand_ce1385,
  author = {Unknown},
  title = {Risk factors for leukemia in Thailand},
  year = {2009},
  doi = {10.1007/s00277-009-0731-9},
  
}
DOI: 10.1007/s00277-009-0731-9PubMed: 19294385

Quick Questions About This Study

This Thai study found GSM service users had 2.1 times higher leukemia risk compared to non-users. GSM operates at 900-1800 MHz frequencies and remains widely used globally, making this finding particularly relevant for current cell phone users.
Workers exposed to power lines showed 4.3 times higher risk of myeloid leukemia in this study. Power lines emit extremely low frequency magnetic fields that have been consistently linked to blood cancers in occupational studies worldwide.
The median cell phone usage duration was only 24-26 months, relatively short compared to current usage patterns. Despite brief exposure periods, researchers still detected increased leukemia risks, suggesting effects may occur relatively quickly after exposure begins.
Certain usage practices showed 1.8 to 3.0 times higher leukemia risk, though the study doesn't specify which practices. The elevated risks had statistical confidence intervals above 1.0, indicating genuine increased risk rather than chance findings.
Yes, benzene exposure increased myeloid leukemia risk 3.9-fold, other solvents 2.3-fold, and occupational pesticides 3.8-fold. Interestingly, diagnostic X-rays and cigarette smoking showed no association with leukemia risk in this population.