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RE: Radon
The question to ask also, is what are the levels in the fertilizer used for
the crops. That will be higher than the general soil.
-----Original Message-----
From: Jim Nelson
To: paulwilliam_s@YAHOO.COM; radsafe@list.vanderbilt.edu
Sent: 6/27/01 12:39 PM
Subject: Radon
Paul,
The tobacoo products would also contain similar concentrations of
polonium-210 whether in the U.S. or Sweden and likely be proportional to
radium concentrations in the soils. Do you think U.S. soils would have
a
higher concentration of radium then Sweden. Do you know of any
analytical
results examining the thorium content?
I have seen analyses by the tobacco companies on the polonium content.
Your points are well taken and of great interest.
Jim Nelson
>From: Paul William Shafer <paulwilliam_s@yahoo.com>
>To: Jim Nelson <nelsonjima@HOTMAIL.COM>, radsafe@list.vanderbilt.edu
>Subject: Re: Radon and Never Smokers
>Date: Wed, 27 Jun 2001 06:28:47 -0700 (PDT)
>
>Jim et al.
>
>I do not find this study at all surprising. It is very
>interesting. Radon's daughter products inhaled in a
>chronic exposure condition would have a greater lung
>retention and greater effect than the thorium and
>organics found in tobacco smoke. Certain tobaccos
>grown in higher thorium soil (red clays for example in
>Ky, Ga, Tn) would be worse than those grown in more
>humic soils (Va, NC). Many Europeans smoke cigarettes
>grown in low thorium soils with higher natural
>nicotine (less chemically induced nicotine
>enhancement). These cigarettes are usually more
>expensive. This may partially explain longevity in
>European cultures who have a larger smoking population
>than the US.
>
>Paul Shafer
>--- Jim Nelson <nelsonjima@HOTMAIL.COM> wrote:
> > Interesting article recently published.
> >
>http://www.epidem.com/article.asp?ISSN=1044-3983&VOL=12&ISS=4&PAGE=396
> >
> >
> > Residential Radon and Lung Cancer among
> > Never-Smokers in Sweden
> >
> > Frédéric Lagarde1; Gösta Axelsson2; Lena Damber3;
> > Hans Mellander4; Fredrik
> > Nyberg1; Göran Pershagen1,5
> >
> > From the 1Institute of Environmental Medicine,
> > Karolinska Institutet,
> > Stockholm;
> > 2Department of Environmental Medicine, Göteborg
> > University, Gothenburg;
> > 3Department of Oncology, University Hospital, Ume;
> > 4Swedish Radiation Protection Institute, Stockholm;
> > and
> > 5Department of Environmental Health, Stockholm
> > County Council, Stockholm,
> > Sweden.
> >
> > EPIDEMIOLOGY 2001;12:396-404
> >
> >
> >
>-----------------------------------------------------------------------
---------
> >
> > In this study, we attempted to reduce existing
> > uncertainty about the
> > relative risk of lung cancer from residential radon
> > exposure among
> > never-smokers. Comprehensive measurements of
> > domestic radon were performed
> > for 258 never-smoking lung cancer cases and 487
> > never-smoking controls from
> > five Swedish case-control studies. With additional
> > never-smokers from a
> > previous case-control study of lung cancer and
> > residential radon exposure in
> > Sweden, a total of 436 never-smoking lung cancer
> > cases diagnosed in Sweden
> > between 1980 and 1995 and 1,649 never-smoking
> > controls were included. The
> > relative risks (with 95% confidence intervals in
> > parentheses) of lung cancer
> > in relation to categories of time-weighted average
> > domestic radon
> > concentration during three decades, delimited by
> > cutpoints at 50, 80, and
> > 140 Bq m-3, were 1.08 (0.8-1.5), 1.18 (0.9-1.6), and
> > 1.44 (1.0-2.1),
> > respectively, with average radon concentrations
> > below 50 Bq m-3 used as
> > reference category and with adjustment for other
> > risk factors. The data
> > suggested that among never-smokers residential radon
> > exposure may be more
> > harmful for those exposed to environmental tobacco
> > smoke. Overall, an excess
> > relative risk of 10% per 100 Bq m-3 average radon
> > concentration was
> > estimated, which is similar to the summary effect
> > estimate for all subjects
> > in the main residential radon studies to date.
> >
> > Keywords: case-control study; lung neoplasms; risk
> > assessment; radon;
> > never-smokers; cocarcinogenesis; tobacco smoke
> > pollution; environmental
> > exposures
> >
> >
> >
>_________________________________________________________________
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> >
> >
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