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1. Two groups of 18 people were exposed to simulated
mobile phone signals under laboratory conditions
while they performed cognitive function tests. There
were no changes in the subjects' ability to recall
words, numbers, or pictures, or in their spatial
memory, but they were able to make choices more
quickly in one visual test when they were exposed to
simulated mobile phone signals. This was the only
change noted among more than 20 variables
compared.
3
2. In a study of 209 brain tumor cases and 425 matched
controls, there was no increased risk of brain
tumors associated with mobile phone use. When
tumors did exist in certain locations, however, they
were more likely to be on the side of the head
where the mobile phone was used.
Because this occurred in only a small number of cases, the
increased likelihood was too small to be statistically
significant.
4
In summary, we do not have enough information at this
point to assure the public that there are, or are not, any low
incident health problems associated with use of mobile
phones. FDA continues to work with all parties, including
other federal agencies and industry, to assure that research
is undertaken to provide the necessary answers to the
outstanding questions about the safety of mobile phones.
What is known about cases of human
cancer that have been reported in users of
hand-held mobile phones?
Some people who have used mobile phones have been
diagnosed with brain cancer. But it is important to
