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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Cancer & Tumors

Radiofrequency Electromagnetic Fields Emitted from Base Stations of DECT Cordless Phones and the Risk of Glioma and Meningioma (Interphone Study Group, Germany).

No Effects Found

Schuz J, Bohler E, Schlehofer B, Berg G, Schlaefer K, Hettinger I, Kunna-Grass K, Wahrendorf J, Blettner M. · 2006

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This German study found no increased brain tumor risk from sleeping near DECT cordless phone base stations that emit continuous low-level RF.

Plain English Summary

Summary written for general audiences

German researchers studied 747 brain tumor patients and 1,494 healthy controls to see if sleeping near DECT cordless phone base stations increases brain tumor risk. They found no increased risk of glioma or meningioma brain tumors, with odds ratios of 0.82 and 0.83 respectively (values below 1.0 suggest slightly reduced risk). This provides initial evidence that low-level radiofrequency exposure from cordless phone base stations may not increase brain tumor risk.

Why This Matters

This study represents an important early investigation into residential RF exposure from cordless phones, devices that emit continuous low-level radiofrequency fields in millions of homes. The researchers used DECT base station proximity as a proxy for chronic nighttime exposure, which is methodologically sound since these devices transmit 24/7 unlike cell phones that only emit during calls. While the study found no increased brain tumor risk, the authors acknowledge the limitation of small exposed numbers, and this represents just one piece of a much larger puzzle. What this means for you is that current evidence doesn't support major concern about cordless phone base stations specifically, though the broader question of cumulative RF exposure from multiple sources in our homes continues to warrant attention as research evolves.

Study Details

The objective of this study was to test the hypothesis that exposure to continuous low-level radiofrequency electromagnetic fields (RF EMFs) increases the risk of glioma and meningioma

Participants in a population-based case-control study in Germany on the risk of brain tumors in rela...

Estimated odds ratios were 0.82 (95% confidence interval: 0.29-2.33) for glioma and 0.83 (0.29-2.36)...

Cite This Study
Schuz J, Bohler E, Schlehofer B, Berg G, Schlaefer K, Hettinger I, Kunna-Grass K, Wahrendorf J, Blettner M. (2006). Radiofrequency Electromagnetic Fields Emitted from Base Stations of DECT Cordless Phones and the Risk of Glioma and Meningioma (Interphone Study Group, Germany). Radiat Res. 166(1):116-119, 2006.
Show BibTeX
@article{j_2006_radiofrequency_electromagnetic_fields_emitted_3382,
  author = {Schuz J and Bohler E and Schlehofer B and Berg G and Schlaefer K and Hettinger I and Kunna-Grass K and Wahrendorf J and Blettner M.},
  title = {Radiofrequency Electromagnetic Fields Emitted from Base Stations of DECT Cordless Phones and the Risk of Glioma and Meningioma (Interphone Study Group, Germany).},
  year = {2006},
  
  url = {https://europepmc.org/article/med/16808597},
}
PubMed: 16808597

Cited By (29 papers)

Quick Questions About This Study

A 2006 German study found no increased brain tumor risk from sleeping near DECT cordless phone base stations. Researchers studied 747 brain tumor patients and found odds ratios of 0.82 for glioma and 0.83 for meningioma, suggesting no significant cancer risk from these devices.
German researchers found no connection between sleeping near DECT cordless phone base stations and glioma brain tumors. The study of 747 patients showed an odds ratio of 0.82, indicating no increased glioma risk from residential exposure to these radiofrequency devices.
A German study found no increasing brain tumor risk with longer duration of DECT cordless phone base station exposure. The research examined both glioma and meningioma cases and found no time-related increase in cancer risk, suggesting duration of exposure isn't a significant factor.
Research indicates DECT cordless phone base stations emit low-level radiofrequency radiation that doesn't significantly increase brain tumor risk. A German study of 747 brain tumor patients found no elevated cancer rates, providing initial evidence these devices pose minimal health risks.
German research found DECT cordless phone base stations don't cause specific types of brain tumors. The study examined both glioma and meningioma cases, finding odds ratios below 1.0 for both tumor types, indicating no increased risk for either brain cancer variety.