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Cancer & Tumors117 citations

Radiofrequency exposure and mortality from cancer of the brain and lymphatic/hematopoietic systems.

No Effects Found

Morgan RW, Kelsh MA, Zhao K, Exuzides KA, Heringer S, Negrete W · 2000

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Large Motorola worker study found no increased brain cancer or blood cancer risk from occupational RF exposure over 20 years.

Plain English Summary

Summary written for general audiences

Researchers followed nearly 200,000 Motorola employees for 20 years to see if workplace radiofrequency exposure increased their risk of brain cancer, lymphoma, or leukemia. Workers exposed to RF radiation actually had lower rates of these cancers compared to the general population, with no increase in cancer risk even among those with the highest exposures or longest work duration.

Why This Matters

This Motorola-funded study represents one of the largest occupational cohorts ever examined for RF cancer risk, but several factors limit its value in understanding modern EMF health risks. The study's strength lies in its massive scale and 20-year follow-up period. However, the exposure assessment relied on job titles rather than actual measurements, and the cohort was relatively young during the study period, meaning many cancers with longer latency periods wouldn't yet appear. What this means for you: while this study found no increased cancer risk, it primarily examined manufacturing workers from the 1970s-1990s, when RF technologies and exposure patterns differed significantly from today's ubiquitous wireless devices. The healthy worker effect may also explain the lower-than-expected cancer rates. This single industry study, despite its size, cannot override the growing body of independent research suggesting potential health risks from chronic RF exposure.

Study Details

The proliferation of wireless communication technologies has raised public concern regarding potential health effects of radiofrequency (RF) exposures. This is the first report of findings from a large-cohort mortality study among employees of Motorola, a manufacturer of wireless communication products.

We examined all major causes of mortality, with brain cancers, lymphomas, and leukemias as a priori ...

Using external comparisons, the standardized mortality ratios for RF-exposed workers were 0.53 [95% ...

Cite This Study
Morgan RW, Kelsh MA, Zhao K, Exuzides KA, Heringer S, Negrete W (2000). Radiofrequency exposure and mortality from cancer of the brain and lymphatic/hematopoietic systems. Epidemiology 11(2):118-127, 2000.
Show BibTeX
@article{rw_2000_radiofrequency_exposure_and_mortality_3258,
  author = {Morgan RW and Kelsh MA and Zhao K and Exuzides KA and Heringer S and Negrete W},
  title = {Radiofrequency exposure and mortality from cancer of the brain and lymphatic/hematopoietic systems.},
  year = {2000},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/11021607/},
}
PubMed: 11021607

Cited By (117 papers)

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Quick Questions About This Study

No, a 20-year study of nearly 200,000 Motorola employees found RF-exposed workers had lower brain cancer rates than the general population. Even workers with the highest radiofrequency exposures showed no increased cancer risk compared to unexposed colleagues.
Research following Motorola employees for two decades found no increased lymphoma or leukemia risk from workplace RF exposure. Workers exposed to radiofrequency radiation actually had lower rates of these blood cancers than expected.
No, the Motorola worker study found no relationship between RF exposure levels and cancer death rates. Employees with peak exposures, longest work duration, and highest cumulative radiofrequency exposure showed no increased cancer mortality risk.
The largest occupational RF study to date found electronics workers had lower cancer rates than the general population. Nearly 200,000 Motorola employees showed no increased brain cancer, lymphoma, or leukemia risk despite workplace radiofrequency exposure.
A comprehensive 20-year study found no brain tumor risk from long-term occupational RF exposure. Motorola workers exposed to radiofrequency radiation for decades had brain cancer rates 47% lower than the general population.