User Manual

Withus. Cdma UI.
2000. 10. - 76 - Make by Withus. Cdma Team
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. 4
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.5
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.
2 Muscat et al. Epidemiological Study of Cellular Telephone Use and Malignant Brain Tumors. In: State of the Science
Symposium;1999 June 20; Long Beach, California.
3 Tice et al. Tests of mobile phone signals for activity in genotoxicity and other laboratory assays. In: Annual Meeting
of the Environmental Mutagen Society; March 29, 1999, Washington, D.C.; and personal communication, unpublished
results.
4 Preece, AW, Iwi, G, Davies-Smith, A, Wesnes, K, Butler, S, Lim, E, and Varey, A. Effect of a 915- MHz simulated
mobile phone signal on cognitive function in man. Int. J. Radiat. Biol., April 8, 1999.
5 Hardell, L, Nasman, A, Pahlson, A, Hallquist, A and Mild, KH. Use of cellular telephones and the risk for brain
tumors: a case-control study.
Int. J. Oncol., 15: 113-116, 1999.
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.
What is FDA's role concerning the safety of mobile phones?
Under the law, FDA does not review the safety of radiation- emitting consumer products such as mobile phones before
marketing, as it does with new drugs or medical devices. However, the agency has authority to take action if mobile
phones are shown to emit radiation at a level that is hazardous to the user.