Due to previous discussion on TT, I thought this might be of interest
to some, if not hit the delete key now. It is the abstract of a
recently published study. In summary it is biggest survey/study into
a possible link between cell phones and cancer. The conclusion, there
isn't an increased risk of cancer from using a cell phone.
Abstract
Cellular Telephones and Cancer: a Nationwide Cohort Study
in Denmark
Background
Use of cellular telephones is increasing exponentially and has
become part of everyday life. Concerns about possible carcinogenic
effects of radio frequency signals have been raised, although they
are based on limited scientific evidence.
Methods
A retrospective cohort study of cancer incidence was conducted in
Denmark of all users of cellular telephones during the period from
1982 through 1995. Subscriber lists from the two Danish operating
companies identified 420,095 cellular telephone users. Cancer
incidence was determined by linkage with the Danish Cancer
Registry. All statistical tests are two-sided.
Results
Overall, 3391 cancers were observed with 3825 expected, yielding a
significantly decreased standardized incidence ratio (SIR) of 0.89
(95% confidence interval [CI] = 0.86 to 0.92). A substantial
proportion of this decreased risk was attributed to deficits of lung
cancer and other smoking-related cancers. No excesses were
observed for cancers of the brain or nervous system (SIR = 0.95;
95% CI = 0.81 to 1.12) or of the salivary gland (SIR = 0.72; 95% CI =
0.29 to 1.49) or for leukaemia (SIR = 0.97; 95% CI = 0.78 to 1.21),
cancers of a priori interest. Risk for these cancers also did not vary
by duration of cellular telephone use, time since first subscription,
age at first subscription, or type of cellular telephone (analogue or
digital). Analysis of brain and nervous system tumours showed no
statistically significant SIRs for any subtype or anatomic location.
Conclusions
The results of this investigation, the first nation-wide cancer
incidence study of cellular phone users, do not support the
hypothesis of an association between use of these telephones and
tumours of the brain or salivary gland, leukaemia, or other cancers.
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