Mobile use doesn't alter kids' cancer risk: study

NEW YORK Wed Jul 27, 2011 6:04pm EDT

Marko Calasan attends class at his elementary school in Skopje February 8, 2010. REUTERS/Ognen Teofilovski

Marko Calasan attends class at his elementary school in Skopje February 8, 2010.

Credit: Reuters/Ognen Teofilovski

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NEW YORK (Reuters) - Children and adolescents who use mobile phones are at no bigger risk of developing brain cancer than those who do not use them, according to a study of patients aged 7 to 19.

The research, published in the Journal of the National Cancer Institute on Wednesday and partially funded by mobile phone operators, addresses concerns that children may be more vulnerable to health risks from electromagnetic radiation from cellphones.

Children's nervous systems are still developing, and there are fears that their smaller head circumferences could allow radiation to penetrate deeper into their brains.

But the study -- the first to look specifically at children and the risk of cancer from cellphones -- found that brain tumor patients were no more likely to be regular phone users than control subjects who did not have cancer.

"If mobile phone use would be a risk factor, you'd expect cancer patients to have a higher amount of usage," said Professor Martin Roosli, who conducted the study at the Swiss Tropical and Public Health Institute in Basel, Switzerland.

Some funding for the study came from the Swiss Research Foundation on Mobile Communication, which is partly supported by Swiss mobile phone operators. They were not involved in the study design or the collection, analysis or interpretation of the data, according the authors.

About 5 billion cellphones are in use today, some 30 years after they were introduced commercially.

The World Health Organization (WHO) reignited interest in possible health risks from cellphones after it said in May that using a mobile phone might increase the risk of certain types of brain tumors.

Roosli's research, conducted between 2004 and 2008 in Norway, Denmark, Sweden and Switzerland, looked at phone use of 352 brain cancer patients and 646 control subjects.

About 55 percent of the patients reported regular mobile phone use compared with 51 percent of the control subjects, according to the study, which defined regular users as making an average of at least one call per week.

The study also found that 75.3 percent of cancer patients used mobile phones more than 20 times in their lives before they were diagnosed, and that 72 percent of control subjects reported using them more than 20 times in their lives.

"What we found was that there was no (significant) difference in the amount of use," Roosli told Reuters, adding that if there is a risk, "it would be a really small risk."

The study involved face-to-face interviews, and Roosli said that he could not be certain about the accuracy of the subjects' recollections of past cellphone use.

He also said teen and child cellphone use has likely increased since they did the study.

One critic of the report said the results were an "unwarranted conclusion."

"Brain tumors can take 10 years to form, and young children certainly have not been heavy cellphone users for very long," said Devra Davis, author of the book "Disconnect: The Truth About Cell Phone Radiation, What the Industry Has Done to Hide It, and How to Protect Your Family."

LONGER TERM STUDIES NEEDED

In a subset of the study, Roosli examined information from mobile service providers about the length of the subjects' cellular subscription when available.

From operator data, he found that the cancer risk doubled for people who used phones for more than three years, but said that this data was unreliable because more cancer patients had provided carrier records than control subjects.

Roosli said phone company records were not always available because some people changed their numbers and some operators were required by law to delete call records after six months.

The study found no evidence of any increase in the risk of tumors in brain areas most exposed to cellphone radiation.

Roosli said that future studies should examine longer-term phone use among children. He suggested collecting phone records from a bigger group to see who develops tumors.

"(This study) provides quite some evidence that use of less than five years does not increase the chance of a brain tumor, but naturally we don't have a lot of long-term users," he said.

In an editorial published with the article, U.S. scientists recommended that investigators keep monitoring population incidence rates.

In the meantime, they said, people who are concerned should consider using an ear piece or the phone's speaker function.

Asked about practices in his own family, Roosli said "our study does not provide strong evidence of a relation, so why should I forbid my children from using cellphones?"

SOURCE: bit.ly/qwjKKV Journal of the National Cancer Institute, July 27, 2011.

(Editing by Richard Chang and Robert MacMillan)

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Comments (3)
paulxk wrote:
In 1999, a superb IEEE study carried out by a prestigious German University proved the thermal anomalies generated in the areas of the brain exposed to mobile proximity.

Because of the characteristics of the waves (non-ionised), it takes a long time to mobile waves to inflict cell damages that lead to the development of the cancerous cells (cancer develops extremely different from a cell/tissue to another, but has a common denominator -cells/tissues that subject fo extended period of time to aggression factors – chemical, physical, viral and in a vast majority of cases trigger the generation of cancerous cells).

However, I would dare to make a remark t your articele: there are no 30 years of commercial mobile use, the mobile phones penetrated consistently the market by mid 90′s, hence we are talking about roughly 15 years….(1/2 the time of what is stated here).

The mentioned study is using only two categories ( no users and occasional users). I find this eihter flawed or deliberately misleading.

I highly appreciate that you – extremely professional – mentioned that the study was funded by mobile operators/ companies. Your readers are intelligent enough to draw conclusions solely based on this mention.

Future will prove the significant effect of mobile radio waves on frequent callers (unfortunatelly – and I am one of them). I wish the future proves me wrong…

Jul 27, 2011 8:00pm EDT  --  Report as abuse
PeterMelzer wrote:
Common sense tells us that young children need not use a cell phone excessively. Perhaps they should not use a cell phone at all.

Brain cancers are rare. Hundreds of millions of people use cell phones. No significant uptick in brain cancers has been detected yet. Associations between certain types of brain tumors and cell phone use have been demonstrated only with professionals using phones that are no longer in use. In sum, no evidence for a common threat to public health has been provided to date. However, as with every innovation, we should remain prudent. The concerned may wish to use wired headsets or voice activation.

Read more here:
http://brainmindinst.blogspot.com/2008/08/cell-phones-risk-of-brain-cancer.html

Jul 28, 2011 11:54am EDT  --  Report as abuse
hsvkitty wrote:
Holy CARP!! Brain cancer isn’t the only damage caused by brain inflammation! Just look at the heat in the brain scan picture you can find online, that is extended well into the brains of children as they use the phone. Adults are “seemingly” less at risk, but the radiation exposure will surely cause damage and has been proven to change the brain metabolism and cell activity.

Short term studies on young children is moronic… as they haven’t lived long enough to show effects. Until we have the ability to see what is directly happening to the DNA and cell structure, thank goodness kids use texting more than the phone on their ear.

Jul 28, 2011 4:42pm EDT  --  Report as abuse
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