August 9, 2011
The first-ever study of mobile phone use by children and adolescents carried out in four European countries found no increased risk of brain cancer, according to a report published online July 27 in the Journal of the National Cancer Institute (JNCI).
Investigators in Denmark, Sweden, Norway, and Switzerland conducted a multicenter case-control study involving children and adolescents 7 to 19 years of age who were diagnosed with a brain tumor between 2004 and 2008. The investigators, led by Dr. Denis Aydin of the Swiss Tropical and Public Health Institute in Basel, conducted interviews with 352 brain tumor case patients, 646 healthy control subjects, and their parents.
The children who regularly used mobile phones were not statistically significantly more likely to have been diagnosed with brain tumors than nonusers, the researchers reported. In addition, those who used mobile phones for at least 5 years did not have a statistically significantly higher risk of developing brain tumors. Moreover, the investigators found no increased risk of brain tumors in the parts of the brain that typically receive the highest levels of mobile-phone radiation exposure.
For some of the children, the investigators were also able to obtain data from mobile phone service providers. In these children, brain tumor risk rose with the amount of time since the family began its mobile phone subscription but not with the amount of mobile phone use as recorded by the service providers, the researchers added.
Previous epidemiologic studies among adult users have found no overall increased risk of brain cancer from mobile phone use. This study addressed concerns that the developing brains and nervous systems of children and adolescents might be more vulnerable to the potential adverse health effects of mobile phone use.
“Researchers continue to monitor trends in brain cancer and mobile phone use,” commented Dr. Martha Linet, chief of the Radiation Epidemiology Branch in NCI’s Division of Cancer Epidemiology and Genetics. “Other ongoing research includes a large study of rodents exposed to mobile phone frequencies that is being conducted by the National Toxicology Program; a prospective study recruiting 250,000 mobile phone users in five European countries; and a case-control study comparing 2,000 young people between the ages of 10 and 24 who were diagnosed with brain tumors and an equal number of control subjects from 13 countries.”
Further reading: “A Conversation with Dr. Martha Linet on Cell Phone Use and Cancer Risk”
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