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Re: RE: Field's comments on Cohen's Observation
Mr. Dukelow,
Why are you sending these personal emails to the whole list rather
than directly to Dr. Field?
Gary Howard
On Thu, 19 Jun 2003 00:05:01 -0700 Dukelow, James S Jr
(jim.dukelow@PNL.GOV) wrote:
>
>Bill,
>
>I am sorry if you are offended that I provided the off-list context
for the message you sent to the list, but I was similarly offended to
have my positions un-represented and mis-represented by the list
hearing only one side of the conversation.
>
>In particular, I made some specific responses to your questions --
questions and comments that are repeated in your posting, as if I had
never responded.
>
>I prefer that the subscribers to RADSAFE be aware of my previously
expressed arguments, while considering your comments.
>
>Your posting, which was sent to me and to the list around noon on
6/18 is essentially identical to a message you sent to me around noon
on 6/17, a message I had not had an opportunity to respond to, in what
I considered our off-list discussion of the issues.
>
>Your posting was not sent to the list "several days ago".
>
>Best regards.
>
>Jim Dukelow
>Pacific Northwest National Laboratory
>Richland, WA
>jim.dukelow@pnl.gov
>
>These comments are mine and have not been reviewed and/or approved by
my management or by the U.S. Department of Energy.
>
>-----Original Message-----
>From: epirad@mchsi.com [mailto:epirad@mchsi.com]
>Sent: Wed 6/18/2003 2:13 PM
>To: Dukelow, James S Jr
>Cc: BERNARD L COHEN; radsafe@list.vanderbilt.edu
>Subject: RE: Field's comments on Cohen's Observation
>
>Jim, this post below was sent to the list a few days ago, your last
message
>included off list messages.
>
>Bill
>
>------------------------------
>
>You stated that from LNT, it follows as the night the day that
radiologically-
>induced cancer incidence (and cancer mortality, given reasonably
uniform
>standards of treatment) is a linear function of person-rem exposure.
As such,
>an ecologic study is adequate to test the LNT, assuming dependence
and
>confounding issues can be handled.
>
>I have two brief comments,
>
>First, radiologically induced lung cancer is not a linear function as
per
>person-rem unless you can describe the population in pretty good
detail. For
>example, there are many factors that modify the assumed linearity
such as age,
>smoking, etc.
>
> Secondly, you state that ASSUMING dependence and confounding issues
can be
>handled, an ecologic study is adequate to test the LNT"
>
>That is really the heart of the problem isn't it? Dr. Cohen has not
persuaded
>me or from what I can tell most informed epidemiologist and
statisticians that
>he has indeed handled effect modifiers and confounders adequately.
Dr. Cohen
>has not addressed the within county joint distributions of even
smoking and
>radon let alone all the other socioeconomic factors that are also co-
>correlated with smoking. Because Dr. Cohen uses ecologic smoking
information,
>he can not hope to correct for the problem I mentioned above
regardless how
>many attempts he makes.
>
>I previously sent Dr. Cohen a possible methodology to address the
within
>county joint distribution problems, but he indicated to me that he
thought the
>methodology had little to do with his work. Therefore, that created
a real
>impasse between us and is why I asked his cooperation in selecting a
3rd party
>to weigh in on this issue (especially if he plans to find any
potential NCRP
>opinion on this topic biased). We are getting no where in these
discussions
>on the list and in fact the discussions have obviously become
irritating to
>some (for which I apologize in part).
>
>Regards, Bill Field
>
>
>
>
>*********************************************************************
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