No Cancer Risk Seen With Cell Phones
Study Shows No Spike in Cancer Among Long-Term Cell Phone Users
Dec. 5, 2006 -- A Danish study shows no rise in cancer among people who've
used cell phones as long as 21 years.
The study included more than 420,000 Danes who got their first cell phone
between 1982 and 1995.
Some of those people kept their phones as long as 21 years. But, on average,
they had cell phone service for 8.5 years.
The study's researchers included Joachim Schuz, PhD, of the Danish Cancer
Society. It tracked cancers among the cell phone users from the start in
1982-1995 through 2002.
During that time, the group had 14,249 cancers.
But that's slightly less than Denmark's expected cancer rate for the general
population, the researchers note.
The data show no increase in brain cancer, leukemia, or tumors of the eyes or
salivary glands among cell phone users.
These findings extend Schuz's 2001 study, which showed no rise in cancer
risk among the same cell phone users over a shorter period of time (three
"We found no evidence for an association between tumor risk and cellular
telephone use among either short-term or long-term users," the researchers
Concerns about cancer had been raised because "during operation, the
antenna of a cellular telephone emits radio frequency electromagnetic fields
that can penetrate 4-6 cm into the human brain," they note.
But most studies have found no association between cell phone use and brain
cancer, write Schuz and colleagues.
Why were cancer rates a bit lower than expected among the cell phone
That's not clear from the study, but perhaps cell phone users have healthier
lifestyles, the researchers say.
They say their findings are "reassuring" and call for further
follow-up, since cell phones are relatively new and cancer can take a long time