[新知] 手機導致腦腫瘤嗎？

[mulkcs (mulkcs)]

Does Long-Term Cell Phone Use Lead to Brain Tumors?

ScienceDaily (Jan. 19, 2011) — The highest-quality research data available
suggests that long-term exposure to microwaves from cellular phones may lead
to an increased risk of brain tumors, reports a paper in the
November/December issue of Journal of Computer Assisted Tomography.

Although debate continues, independent studies with long-term follow-up
strongly suggest an increased risk of brain tumors related to the use of
cellular or cordless phones. "We conclude that the current standard of
exposure to microwave during mobile phone use is not safe for long-term
exposure and needs to be revised," conclude the study authors, led by R.B.
Dubey of Apeejay College of Engineering, Sohna, Gurgaon, India.

Brain Tumor Risk May Double after 10 Years of Cell Phone Use

There is increasing public concern about the potential cancer risks from
microwave emissions related to wireless phones -- not only cellular phones
and base stations (transmission tower antennae), but also home cordless
phones. Some studies have reported that long-term wireless phone users have
increased rates of brain tumors, including malignant gliomas and benign
acoustic neuromas. However, other studies have found no association.

To gain insight into the controversy, Dubey and colleagues performed an
in-depth analysis of research on the health risks associated with microwave
exposure from wireless phones. To date, only eleven published studies have
provided data on the risk of developing brain tumors in long-term cell phone
users -- ten years or longer.

The largest data source was a series of studies called the Interphone
studies, which were largely funded by the wireless communications industry.
Based on data from thirteen countries, the Interphone studies concluded that
cell phone exposure did not increase the risk of brain tumors. In addition to
possible bias associated with industry funding, the studies had some
important flaws, including relatively short durations of cell phone use.

However, an independent series of studies led by Swedish cancer specialist
Dr. Lennart Hardell reached a different conclusion. Dr. Hardell's studies
included more patients who had used a cell phone for ten years or longer and
were performed without financial support from the wireless industry. The
findings suggested that the more hours of cellular phone use over time, the
higher the risk of developing brain tumors. Risk also increased along with
the level of power from the wireless device, years since first use, total
exposure, and younger age when starting wireless phone use.

Based on an analysis of pooled data from different studies, researchers
write, "[L]ong-term cell phone usage can approximately double the risk of
developing a glioma or acoustic neuroma in the more exposed brain hemisphere"
-- that is, on the side where the user typically holds the phone to the ear.
That conclusion is consistent even with data on the long-term cell phone
users from the Interphone studies.

It's unclear exactly how exposure to microwave radiation from cell phones may
increase brain cancer risk. However, studies have shown that the cell signal
is absorbed up to two inches in the adult skull. There is special concern
about the risks in younger age groups, as cell phone signals penetrate much
deeper into the brain in children.

Further studies are needed to definitively determine the risk of brain cancer
and other health effects related to long-term use. Meanwhile, Dr. Dubey and
coauthors suggest some steps that cell phone users can take to reduce
exposure. These include limiting the number and length of calls, restricting
children's cell phone use, communicating by text instead of voice, and
wearing an "air tube" headset (not a regular wired headset) rather than
holding the phone to the ear.

The researchers also urge adoption of newer phones and other technologies to
reduce exposure, and call for government action to revise standards for
microwave exposure. "The precautionary principle clearly applies in this
case, since the problem is possible but not certain and low cost ameliorating
actions are easily implemented by industry," Dubey and coauthors conclude.
"With over 3 billion people using cell phones and with children among the
heaviest users, it is time for governments to mandate precautionary measures
to protect their citizens."

--
原文：
http://www.sciencedaily.com/releases/2010/11/101105213809.htm

論文：
http://dx.doi.org/10.1097/RCT.0b013e3181ed9b54

答案是是的。
並且和手機無線訊號的強度與使用時間有關。
當然這研究和一般看到的研究結論不一致，
他的批評是其他研究很多都是通訊公司資助的，
觀測時間也不夠長。



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◆ From: 140.112.33.136
推 skylikewater:觀察時間長 confounding更多啊~  \ˊ▽ˋ /
→ skylikewater:說導致是否也太強 畢竟這麼長年的流行病學調查
→ skylikewater:是否有修正base rate跟其他可能致病因子 應該是值得
→ skylikewater:討論的
→ mulkcs:樓上說得沒錯...而且他還特別說了他涵蓋了比較多的病患
→ mulkcs:那麼是用手機導致腦腫瘤 還是腦腫瘤病患很多都有手機的這種
→ mulkcs:問題是需要釐清的。