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Cancer & Tumors195 citations

Handheld cellular telephone use and risk of brain cancer, JAMA. 2000 Dec 20;284(23):3001-7

No Effects Found

Authors not listed · 2000

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This early study found no increased brain cancer risk from minimal cell phone use, but participants averaged under 3 years of exposure, far too short to detect slow-growing tumors.

Plain English Summary

Summary written for general audiences

This 2000 case-control study examined 469 brain cancer patients and 422 matched controls across five U.S. medical centers to investigate whether handheld cell phone use increases brain cancer risk. Researchers found no overall increased risk, with users actually showing slightly lower odds ratios compared to non-users, though they noted more brain tumors occurred on the same side of the head where phones were used. The study acknowledged important limitations including short average use duration (under 3 years) and the need for longer-term data to assess slow-growing tumors.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2600 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2600 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale
Cite This Study
Unknown (2000). Handheld cellular telephone use and risk of brain cancer, JAMA. 2000 Dec 20;284(23):3001-7.
Show BibTeX
@article{handheld_cellular_telephone_use_and_risk_of_brain_cancer_jama_2000_dec_20284233001_7_ce1080,
  author = {Unknown},
  title = {Handheld cellular telephone use and risk of brain cancer, JAMA. 2000 Dec 20;284(23):3001-7},
  year = {2000},
  doi = {10.1001/jama.284.23.3001},
  
}
DOI: 10.1001/jama.284.23.3001PubMed: 11122586

Quick Questions About This Study

The average duration of cell phone use was 2.8 years for brain cancer cases and 2.7 years for controls, with median monthly usage around 2.5 hours. This represents minimal exposure compared to modern usage patterns, where many people use phones multiple hours daily for decades, making these findings less applicable to today's users.
Yes. Among brain cancer cases, cerebral tumors occurred more frequently on the same side of the head where cell phones were used, with 26 cases on the same side versus 15 on the opposite side. However, this pattern was less clear for temporal lobe cancers specifically, where more occurred on the opposite side.
The study's participants had minimal cell phone exposure, averaging under 3 years of use with less than 3 hours monthly. The researchers themselves acknowledged that brain tumors, particularly slow-growing types, can take 10-20 years or longer to develop, meaning the follow-up period was too short to detect many cancers that might result from long-term exposure.
The study examined all histologic categories of brain cancer. Most showed odds ratios below 1.0, suggesting no increased risk. However, neuroepitheliomatous cancers, an uncommon tumor type, showed an odds ratio of 2.1, suggesting potential elevated risk, though this finding didn't reach statistical significance due to small numbers.
The study included 469 men and women aged 18 to 80 with primary brain cancer and 422 matched controls without brain cancer, recruited from five U.S. academic medical centers between 1994 and 1998. Researchers used structured questionnaires to assess cell phone use patterns and compared usage between these two groups.