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Mobile Telephony Increases Brain Tumor
Risk
National Institute Of Working Life
August 21, 2002
NMT (Nordic Mobil Telephone) users run a greater risk of suffering a brain tumor.
This is the conclusion of the largest study so far into mobile phone use and the
risk of brain tumors, published in the European Journal of Cancer Prevention.
It is clear that NMT users should exercise
caution, states Professor Kjell Hansson Mild of the Swedish National Institute
for Working Life, who worked on the study with Professor Lennart Hardell of Örebro
University Hospital.
The study comprises 1,617 patients diagnosed with a brain tumor during the
period 1997 to June 2000 in central Sweden. These were then compared with an
equally large control group with no brain tumors. NMT users were shown
statistically to run a 1.3 times greater risk. Viewed over a ten year period,
the risk is 1.8 times greater.
The risk is higher primarily in the temporal lobe, on the same side as the phone
is used. Here the risk is 2.5 times greater. The type of tumor showing the
largest increase, a 3.5 times greater risk, is tumors of the auditory nerve.
There was not the same clear increase in risk for GSM (Global System for Mobile
Communications) phone users. In this context, the use of GSM is a relatively new
phenomenon and nobody in the study had been using such a phone for more than ten
years.
Although we can see similar tendencies, any conclusions regarding these phones
must wait until the results of other ongoing studies are published, comments
Kjell Hansson Mild.
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