Samsung SCH-T300 - Manual (Page 168)

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Cellular Telecommunications Industry Association (CTIA) in particular is expected to
lead to FDA providing research recommendations and scientific oversight of new CTIA-
funded research based on such recommendations.
Two other studies of interest have been reported recently in the literature:
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.
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.
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 understand that this type of cancer also occurs among people who have
not used mobile phones. In fact, brain cancer occurs in the U.S. population at a rate of
about 6 new cases per 100,000 people each year. At that rate, assuming 80 million users
of mobile phones (a number increasing at a rate of about 1 million per month), about
4800 cases of brain cancer would be expected each year among those 80 million people,
whether or not they used their phones. Thus it is not possible to tell whether any
individual's cancer arose because of the phone, or whether it would have happened
anyway. A key question is whether the risk of getting a particular form of cancer is
greater among people who use mobile phones than among the rest of the population.
One way to answer that question is to compare the usage of mobile phones among
people with brain cancer with the use of mobile phones among appropriately matched
people without brain cancer. This is called a case-control study. The current case-control
study of brain cancers by the National Cancer Institute, as well as the follow-up research
to be sponsored by industry, will begin to generate this type of information.