Can cellphone use lead to cancer?
Broadcast:
November 25, 2003
<<main page
Twelve million Canadians use cellphones
— and that number is growing by the day. So many people
use cellphones that you would have thought the fears about
cellphones and brain tumours had disappeared.
But — quietly — a huge international
agency has been gathering evidence, trying to answer the question:
can cellphone use lead to cancer?
A decade ago, there was a lot of buzz that the
radiation from cellphones can lead to cancer. A Florida man
went to court, arguing that his wife's brain cancer was the
result of prolonged use of cellular phones.
A number of studies had been conducted —
some said there was a link, others found no connection.
Health Canada decided there is no conclusive
evidence of a health risk from cellphones. In the U.S., a
much bigger project is underway.
In 1997, scientist George Carlo headed up the
Wireless Technology Research group in
Washington. He had spent $28 million U.S. over six years.
But because his research group was funded entirely by members
of the cellphone industry, it's dismissed as a big public
relations job.
Carlo
insists there is no proof of a health risk, supporting what
becomes sort of a message track from the cellphone industry
— from people like Roger Porier of the cellphone lobby.
"The overwhelming evidence from the scientific
community — these are the top people in the world who
are investigating these things — conclude time after
time there are no adverse health effects in fields of this
nature."
But Carlo, who was once the cellphone industry's
hired gun, has morphed into one of the industry's biggest
critics. Carlo's afraid there is a possible health threat.
He thinks we should be told.
What's changed?
Carlo says the scientific research the cellphone
industry paid him to oversee, turned up some problems.
"Is it absolute definitive proof? No, does
it raise red flags of concern among public health people?
Absolutely."
Carlo says research on rats found cellphone
use could lead to genetic damage, which some argue, could
lead to cancer. He says another small study on humans showed
an increased tendency of tumours among cellphone users.
Carlo reported his findings to the industry
and recommended it warn the public.
"When they found that we had findings of
genetic damage and increasing risk of cancer they cut off
our money completely."
Carlo's studies were shelved — and so
was he. He's now trying to apply a little scientific research
to the game of golf.
"Those of us who are no longer auditioning
for future funding can be a lot more outspoken than folks
worried about the next grant coming down the line."
But Carlo does have a tell-all book for sale.
He's sold the rights to Hollywood. In the book, he accuses
the cellphone industry of major spinning — of downplaying
the science it doesn't like and supporting research it does
like. People end up, Carlo says, thinking cellphones are all
right.
Emphasizing the positive is a lobbyist's job,
but Carlo says the cellphone industry has been doing a lot
more than that. He says it's been lobbying prestigious scientific
bodies to do a study that will make fears about cellphones
and cancer go away. And what could be more prestigious than
an agency of the United Nations and the World Health Organization?
International Agency for Research on
Cancer
For almost forty years, we've relied on the
International Agency for Research on Cancer to help us live
our lives. The Lyons, France based agency tells us what causes
cancer — so it affects what we eat and drink, how we
work and how we build our homes.
We go to meet the people who put the labels
on everything from saccharine to asbestos to second hand smoke.
When you hear something labelled possibly or probably carcinogenic,
odds are it got the label from IARC. Now IARC is looking at
cellphones.
For the past six years, scientist Elisabeth
Cardis has been overseeing the IARC cellphone study.
"What we have tried to set up is a study
in which we gave ourselves all of the
chances to find an effect, if it exists,"
Cardis said. "The risk of cancer is not very high at the
individual level, but if you multiply by a billion users around
the world, that could mean hundreds or thousands of cancers
around the world…so it’s obviously important to
determine whether there’s a risk and how big that risk
is."
The IARC study is looking
at more than 5,000 cellphone users with brain tumours in
13 countries, including Canada. It's looking to see if they
used their cellphones differently than the rest of us. This
type of epidemiological study has been done several times
before but has always been criticized — either as not
long term enough or not specific enough to find any conclusive
link to cancer. Cardis says this study will be different.
"We have designed a study which going to
overcome a lot of these limitations."
But George Carlo says the design of the IARC
study is sure to make the cellphone industry happy.
"The cellphone industry thinks this study
is the last nail in the coffin," Carlo said. "They’re
going to say that this is the biggest study that’s
ever
been done in a dozen different countries, all the top scientists,
and the findings are going to come out and say that everything
is fine for consumers."
Carlo says the study itself is flawed because
it will be biased toward finding nothing.
"We don’t want to be saying these
scientists are corrupt because they’re not. But they
have limited data and they make limited interpretation that
they have limited data. The sum total of that is that consumers
believe they are being taken care of when in fact they are
not."
Keeping science clear of the kind of industry
influence George Carlo talks about has always been a concern
at IARC. Lorenzo Tomatis saw it during his 23 years there
— 12 as the agency's director.
"It's always been on a razor blade, it
was always difficult to be completely independent."
But now Tomatis criticizes IARC for being too
open to industry pressure.
"Perhaps there is less attention on the
side of IARC in checking the influence that comes from outside."
Tomatis' concern about IARC's independence stems
from its recent ruling on another controversy.
Controversy at IARC
Broadcast: November 25, 2003
<<main page
A few years ago, there was a flap over something
called DEHP. It’s found in IV bags, blood bags and tubing
of all kinds. DEHP makes plastic soft, pliable and strong.
It was found to cause problems in rats, including infertility.
After a full review, IARC decided to downgrade
the risk of cancer from DEHP. That opened the door for more
widespread use.
Lorenzo Tomatis |
For Lorenzo Tomatis, the downgrading of DEHP
was a clear sign IARC had let industry
get too close to the science.
He and 30 other scientists from around the world decided to
go public with their fears saying that allowing industry representatives
to take part in IARC's decisions about what is cancerous "compromises
public health" and that scientific papers showing a possible
link to cancer had been
"ignored or intentionally suppressed."
"If you delete a suspicion of a risk,"
Tomatis said, "you give full green light and that may
create a special danger for the public."
Paul Kleihues took over from Tomatis as head
of IARC. He says these critics always see industry as the
enemy of public health.
"If they don't have scientific reasons
they suggest a conflict of interest of industry or participants
that have a vested interest. We do not believe that any of
our recent decisions was ultimately influenced by industry."
Kleihues rejected the accusation and then barred
Lorenzo Tomatis from ever re-entering the building.
"He told me I was persona non grata and
had me escorted out by two witnesses from the building saying
I was not allowed to come back…I think even Saddam Hussein
could go back into IARC but not me. I found it totally absurd
because it was a disagreement on the interpretation of scientific
data."
Peter Kleiheus |
"We did not ban him because of a scientific
disagreement," Peter Kleihues said. "What
is not acceptable is that
he questions our integrity, our striving for scientific truth.
If scientific truth is no longer our guiding principle, we’d
better close this whole place down."
What
does this squabbling mean for the cellphone study and for
those of us who use a cellphone? The critics are accusing
IARC of not trying hard enough to keep industry money and
influence away from the science. Marketplace wondered
whether industry money could be influencing IARC's study on
cellphones, especially in Canada.
Calling Canada
Dan Krewski, of the McLaughlin Centre for
Population Health Risk Assessment at the University of Ottawa,
is one of Canada's lead scientists for the IARC study.
"This’ll be the largest study of
brain cancer ever conducted and will give us the opportunity
to really look in detail for small risks with cellular technology."
Dan Krewski |
Krewski has about a million dollars to fund
his part of the IARC research.
Most of it came from the Canadian Wireless
and Telecommunications Association — the cellphone industry
lobby group. "We originally
approached the CWTA through Roger Poirier who at the time
was president and CEO of the organization."
Poirier's the man who said studies into the
cellphones and cancer risks showed “…no adverse
health effects…”
The current head of the association is Peter
Barnes. He says the million dollars his lobby group is giving
to Krewski's centre has no strings attached.
"I mean we basically sign a cheque every
year for five years, we committed to that, and apart from
knowing that the money is being used for the research that’s
the extent of our involvement."
IARC told Marketplace that Canada
is the only one of 13 countries in the study to receive funding
directly from the cellphone industry.
Marketplace's research found that the
CWTA and its members invested $1 million to help establish
the R. Samuel McLaughlin Centre for Population Health Risk
Assessment at the University of Ottawa — where Dan Krewski
is doing his cellphone research.
Krewski's centre gets the cheques directly from
the CWTA. But to get the relationship stamped officially "arm's
length," he had to get the deal reviewed by the Canadian
Institutes of Health Research, which also threw in $220,000
of government money.
According to IARC guidelines, this funding has
to be indirect - so it went through the CIHR. That makes the
funding not directly connected to the industry.
The study is not Krewski's only link to the
cellphone industry. If you search the web for information
about cellphones, you might come across the Wireless Information
Resource Centre — paid for by the CWTA.
Krewski chairs the Wireless Information Resource
Centre's scientific advisory group. Roger Poirier — former
head of the CWTA — administers the web site. Another
link between the cellphone scientist and the cellphone lobby:
Poirier — the man who negotiated the million-dollar
deal — is a paid consultant on the big cellphone study
for IARC.
When we reached Poirier by phone, he told us
his involvement with the cellphone study is minor and purely
technical. He didn't want to talk to us on camera.
Krewski described Poirier's involvement as "a
liaison."
"He puts us in contact with the right people
when we need info on technical aspects of cell phones for
the WHO study…He doesn't see scientific results, he
does not participate in scientific meetings."
A chart we produce for Krewski shows the same
names and links popping up frequently.
"I can see how you could get that sort
of perception there may be something leading to some sort
of complications here, but if you actually look at the roles
of the organizations and agencies that you’ve got on
your chart and what they’re actually doing, the industry,
clearly, both in Canada and internationally, is hands off,"
Krewski says.
But it wasn't that clear in Europe. The scientists
at IARC say the European cellphone industry did try to negotiate
more influence over that end of the study.
"So we wanted not only to avoid any bias,
but we didn't want to get any involvement with an industry
which then doesn't like the results and tries all kinds of
things," IARC's Peter Kleihues said.
Kleihues told us industry reps came knocking
as the negotiations on the study were happening.
"They wanted to give us the money. They
said 'enlarge, do more, you will be happy because we are so
much interested, we are under pressure, we would like a bigger
and better study,' and we said 'no, it’s not possible,
we can’t accept the money.'"
"Yeah, basically we refused until a contract
was drawn up that ensured we had no strings
attached," research scientist Elisabeth Cardis said.
That means there is still industry funding in Europe, but
a third party administers the money. In Canada, the industry
money goes to Dan Krewski's centre.
"We are trying very hard through various mechanisms to
make sure that everything is going well in the countries to
review…to see what mechanisms have been set up. We have
been preparing declarations of interest for example; we’ve
been documenting sources. We’re getting copies of all
the contracts. If we feel that any centre has a potential conflict
of interest, that centre’s not going to be included in
the international analysis," Cardis said. Cardis
adds the connections involved with the
Canadian part of the study don't seem to be a conflict of
interest to her. But her boss — IARC chief Paul Kleihues
— does seem concerned about our findings.
"Well, I think this is a reason for concern.
Industry doesn't give you a free lunch usually. That means
industry expects something back for any money they do, and
I think we must look into this. It's a matter of concern and
we must find out if it's sufficient reason to exclude that
branch of the study or not."
Kleihues goes on to say that as far as he can
see, the Canadian part of the study appears to have been set
up carefully, to follow the rules.
As we kept digging, we discovered that not only
does the Canadian cellphone lobby pay for a chunk of Krewski's
research at the University of Ottawa, it also has an impact
on his salary. We learned that the CWTA money unleashes government
money that goes towards Krewski's salary. Krewski says these
arrangements are all above board.
The head of IARC - Paul Kleihues told us he
was reviewing for possible conflicts of interest the contracts
people like Krewski had signed. He said no decisions or changes
would be made until an IARC meeting in mid-December.
As for the study itself — it won't be
complete for a couple of years. So get ready for another long
wait before we get any definitive answer on that old riddle
over cellphones and cancer.
All cellphones in Canada meet the basic radiation
safety guidelines. But anyone concerned about exposure can
take a couple of steps to limit it:
- When you see only one or two bars on your
phone's display, it means the signal is weak and your phone
is trying harder to connect with the tower. That's when
radiation is highest. Wait until all the bars are there
for less radiation.
- Radiation is also higher when you first place
a call, as your phone seeks a connection. If you wait until
the call has connected, your exposure will be lower.
- Keep your calls short — shorter calls
means less exposure.
Classifications that IARC uses
when evaluating possible human carcinogens
Broadcast: November
25, 2003
<<main page
Group 1: Known Human Carcinogen
Group 2A: Probable Human Carcinogen
Group 2B: Possible Human Carcinogen
Class 3: Not Classifiable for Human Carcinogenicity
Class 4: Probably not carcinogenic to Humans
Regulatory agencies like Health Canada and the
US FDA use these rulings by IARC to help develop positions
on chemical agents. Some government agencies also use these
rulings to help develop policy.
IARC currently does not have a classification
for cellphones. It plans to issue one after the current study
involving 13 countries and 5,000 cellphone users wraps up.
That's expected to take another two years.
http://www.cbc.ca/consumers/market/files/health/iarc/pageone.html
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