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

Brain & Nervous System

Eggert T, Dorn H, Sauter C, Schmid G, Danker-Hopfe H

No Effects Found

Authors not listed · 2020

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High-level GSM and TETRA exposure improved rather than disrupted sleep, with women showing stronger responses than men.

Plain English Summary

Summary written for general audiences

Researchers tested how GSM900 and TETRA radio frequencies affect sleep in 60 elderly adults (30 men, 30 women) using a rigorous double-blind study design. Both frequencies actually improved certain sleep measures, but women showed more pronounced effects than men. The findings suggest radiofrequency exposure doesn't disturb sleep and may even have subtle beneficial effects.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz (GSM) and TETRA exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHz (GSM) and TETRAPower lines50/60 Hz5G mm28 GHzLogarithmic scale
Cite This Study
Unknown (2020). Eggert T, Dorn H, Sauter C, Schmid G, Danker-Hopfe H.
Show BibTeX
@article{eggert_t_dorn_h_sauter_c_schmid_g_danker_hopfe_h_ce3224,
  author = {Unknown},
  title = {Eggert T, Dorn H, Sauter C, Schmid G, Danker-Hopfe H},
  year = {2020},
  doi = {10.1016/j.envres.2020.109181},
  
}
DOI: 10.1016/j.envres.2020.109181PubMed: 32014649

Quick Questions About This Study

Yes, this study found significant sex differences. Women showed more pronounced sleep improvements under both GSM900 and TETRA exposure, including faster onset of deep sleep stages and fewer nighttime awakenings compared to men.
Participants received 30 minutes of exposure before sleep, then continuous exposure for the entire 7.5-hour sleep period using a specially designed head-worn antenna system throughout the night.
The study used 6 W/kg for TETRA and 2 W/kg for GSM900 exposure levels. These are higher than typical cell phone use, which generates around 0.5-2 W/kg during calls.
According to this study, yes. Both GSM900 and TETRA exposure reduced sleep arousals, shortened time to deep sleep, and decreased self-reported time awake after sleep onset in elderly participants.
Researchers suggest the observed sleep improvements might result from skin-related thermoregulatory mechanisms triggered by the radiofrequency exposure, though the exact biological pathways remain unclear and require further investigation.