Mobile phones not linked to brain tumours

[size=12pt]Mobile phones not linked to brain tumours[/size]

Mobile phone use rose dramatically in the early 1990s, but five to 10 years later there was no increase in the incidence of brain tumours in Denmark, Finland, Norway, and Sweden, a study has found.

The authors of the study, published in the Journal of the National Cancer Institute, wrote, “Radio frequency electromagnetic fields emitted from mobile phones have been proposed as a risk factor for brain tumors; however, a biological mechanism that could explain the potential effect of radio frequency electromagnetic fields in the risk of brain tumors has not been identified.”

If mobile phones caused brain cancers, the number of cancers should have risen 5-10 years after exposure, they say, but “no change in incidence trends [of brain cancers] was observed from 1998 to 2003, the time when possible associations between mobile phone use and cancer risk would be informative about an induction period of 5-10 years.”

The study was based on nearly 60 000 cases of brain tumours diagnosed from 1974 to 2003 among 16 million people, the entire population of the four Nordic countries, which have good cancer registry information.

[size=8pt](da Student BMJ)[/size]

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