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Re: Radon Field Day
All smokers volunteer, in full knowledge, to get lung cancer. How many
millions are they only in the USA? If our collective objective is to reduce
the number of lung cancers, why attack first the major cause and then move
to the second and third ones ? It is matter of cost-benefit analysis.
Philippe Duport
----- Original Message -----
From: <epirad@mchsi.com>
To: <hflong@postoffice.pacbell.net>
Cc: "Richard F. Orthen" <rorthen@EARTHSCIENCES.NET>; "Radsafe BBS"
<radsafe@list.vanderbilt.edu>
Sent: Friday, May 17, 2002 11:02 PM
Subject: Re: Radon Field Day
> Howard,
>
> I don't think anyone wants to volunteer to get lung
> cancer.
>
> Bill Field
> > Good News!
> > The Field (Iowa) and Wang (China) studies do suggest more frequent lung
cancer
> > at
> > highest radon exposure than at lesser exposure, but that may be because
there is
> > LESS lung cancer at moderate exposure (37 Bq/cubic meter, 1 pCi/L up to
4x that)
> > than with less exposure, according to the Cohen USA study!
> >
> > All three studies have confounders which the authors struggled to
remove, but
> > are
> > likely not to be improved upon until we have placebo controlled radon
exposure.
> > Any volunteers?
> >
> > Howard Long
> >
> > "Richard F. Orthen" wrote:
> >
> > > Another from IEM's news desk:
> > >
> > > May 17, 2002 - Ascribe News (05/16/02) - University of Iowa Study
Finds
> > > Health Risk From Residential Radon Exposure Higher Than Previously
> > > Estimated - The health risk posed by residential radon exposure may
have
> > > been substantially underestimated in previous studies, according to
> > > investigators in the University of Iowa College of Public Health.
Long-term
> > > exposure to radon gas in the home is associated with increased lung
cancer
> > > risk and presents a significant environmental health hazard. "Our
findings
> > > indicate that the exposure assessment models used in many previous
studies
> > > may have underestimated the risk posed by residential radon exposure
by 50
> > > percent or more," said lead author R. William Field, Ph.D., a research
> > > scientist with the UI Department of Epidemiology. The results of the
study
> > > appear in the May 2002 issue of the Journal of Exposure Analysis and
> > > Environmental Epidemiology. The UI researchers examined several
exposure
> > > assessment methods used by previous residential radon studies
performed in
> > > North America, Europe and China. They compared these models to a more
> > > comprehensive exposure method that linked a person's movement to
various
> > > radon measurements within a home. All of the models were assessed
using the
> > > same study population. The exposure methods used by previous studies
all
> > > produced lower risk estimates than the comprehensive method. The
highest
> > > degree of error was noted for methods that based risk solely on
basement
> > > radon measurements. "While radon concentrations tend to be highest in
> > > basements, people typically spend limited time there," Field said. "A
more
> > > accurate assessment of risk can be formulated by linking multiple
radon
> > > measurements taken within a home to where and how much time an
occupant
> > > spends in the home."
> > >
> > > Rick Orthen
> > >
> >
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