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Meta-analysis of long-term mobile phone use and the association with brain tumours.

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Hardell L, Carlberg M, Söderqvist F, Hansson Mild K. · 2008

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Ten-year mobile phone users show doubled brain tumor risk on the same side of the head where they hold their device.

Plain English Summary

Summary written for general audiences

Researchers analyzed data from multiple studies examining whether long-term mobile phone use increases brain tumor risk. They found that when people used phones for 10 years or longer on the same side of their head where tumors developed, the risk of glioma (a type of brain cancer) doubled and acoustic neuroma (a benign tumor) risk increased by 140%. However, using phones on the opposite side of the head showed no increased risk.

Why This Matters

This meta-analysis reveals a troubling pattern that the wireless industry has long disputed: the side of the head where people hold their phones matters for cancer risk. The science demonstrates that radiation exposure creates localized biological effects, not systemic ones. What makes this research particularly significant is the dose-response relationship it reveals - longer use periods and same-side exposure both increase risk in a predictable pattern. The reality is that most people hold their phones consistently on one side, creating exactly the exposure pattern this study links to doubled cancer risk. You don't have to wait for perfect certainty to take precautionary steps like using speaker phone or wired headsets.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

The aim of this study is to investigate Meta-analysis of long-term mobile phone use and the association with brain tumours.

We evaluated long-term use of mobile phones and the risk for brain tumours in case-control studies p...

We identified ten studies on glioma and meta-analysis yielded OR = 0.9, 95% CI = 0.8-1.1. Latency pe...

We conclude that this meta-analysis gave a consistent pattern of an association between mobile phone use and ipsilateral glioma and acoustic neuroma using > or =10-years latency period.

Cite This Study
Hardell L, Carlberg M, Söderqvist F, Hansson Mild K. (2008). Meta-analysis of long-term mobile phone use and the association with brain tumours. Int J Oncol. 32(5):1097-1103, 2008.
Show BibTeX
@article{l_2008_metaanalysis_of_longterm_mobile_2173,
  author = {Hardell L and Carlberg M and Söderqvist F and Hansson Mild K.},
  title = {Meta-analysis of long-term mobile phone use and the association with brain tumours.},
  year = {2008},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18425337/},
}
PubMed: 18425337

Cited By (174 papers)

View all 174 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, this 2008 meta-analysis found that using mobile phones for 10+ years on the same side where brain tumors developed doubled glioma risk and increased acoustic neuroma risk by 140%. Using phones on the opposite side showed no increased risk.
The Hardell study found that mobile phone use must exceed 10 years before brain tumor risk increases significantly. Shorter usage periods showed no association with glioma, acoustic neuroma, or meningioma development in their meta-analysis.
Long-term mobile phone use (10+ years) on the same head side is associated with glioma (malignant brain cancer) and acoustic neuroma (benign tumor affecting hearing). The 2008 meta-analysis found doubled glioma risk and 140% increased acoustic neuroma risk.
Yes, the study suggests switching ears may reduce risk. When phones were used on the opposite side from where tumors developed, researchers found no significant increase in brain tumor risk, unlike same-side usage which doubled glioma risk.
Both benign and malignant brain tumors showed increased risk from same-side phone use exceeding 10 years. Acoustic neuromas (benign) had 140% increased risk while gliomas (malignant) had doubled risk in this comprehensive meta-analysis of multiple studies.