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Study: Cell Phones Don't Raise Brain Cancer Risk in Kids Thu Jul 28, 2011 6:01 am
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Study: Cell Phones Don't Raise Brain Cancer Risk in Kids


July 27, 2011 -- Children and teens who use cell phones are not at increased risk of getting brain cancer, according to a new Swiss study.

"We did not find that young mobile phone users have an increased risk for brain tumors when regularly using mobile phones," says study researcher Martin Roosli, PhD, of the Swiss Tropical and Public Health Institute, University of Basel.

Nor did they find a link with longer use. "We did not see that the risk increased after five years or more since the first use of mobile phones," he tells WebMD.

The study is believed to be the first to research cell phone use among youth with brain tumors.

Roosli calls the results ''reassuring."

However, he adds a caveat: "The amount of use in our study is relatively low," he says.

Regular users in the study, conducted from 2004 to 2008, were defined as those who talked at least once a week for six months or more. "Nowadays, I think young people use [cell phones] more," Roosli says.

Like other experts, he urges continued study and monitoring.

The study is published in the Journal of the National Cancer Institute. Among the funding sources is the Swiss Research Foundation on Mobile Communication. The organization had no input into the research, Roosli tells WebMD, and was not informed of the results before publication.

Cell Phones and Kids Roosli and his team looked at the medical records of 352 children and teens ages 7 to 19 who had been diagnosed with brain cancers.

In interviews, the researchers asked the youths and their parents about mobile phone use. Phone service providers also provided some information.

The youngsters were from Norway, Denmark, Sweden, and Switzerland.

For comparison, the researchers turned to 646 children and teens matched by country, age, and sex. They asked them for the same information.

Roosli took into account whether the youngsters used hands-free devices or not.

Among the results:

Regular users of mobile phones were not more likely to be diagnosed with brain cancers. While over 75% of the brain cancer patients had talked on a mobile phone more than 20 times before the diagnosis, 72% of the healthy young people had done so in the same time period. Children who began to use cell phones at least five years earlier did not have a higher risk of brain cancer compared to nonusers. A small subset of 24 brain cancer patients and 25 healthy youths had data from the phone providers. For these kids, Roosli found cancer risk was related to the amount of time the youth had a phone subscription, but not to the amount of use. This could be due to factors such as brain cancer patients being more diligent about getting information from providers, Roosli tells WebMD. The parts of the brain with the highest exposure to the phone's radio-frequency waves were not linked with an increased risk of brain cancer among regular users. The incidence of brain cancers has not risen over the last 20 years in countries with widespread cell phone use, Roosli says. The further refutes a link, he says.

Even so, he says, cancer registries should continue to monitor trends in cancer rates.

http://www.webmd.com/cancer/brain-cancer/news/20110727/study-cell-phones-dont-raise-brain-cancer-risk-in-kids?src=RSS_PUBLIC
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Study: Cell Phones Don't Raise Brain Cancer Risk in Kids Thu Jul 28, 2011 6:01 am
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