Sampling using summay data

["Harry Hinks" <harryhinks@hotmail.com>]

Prof. Cohen,



I thought there were differences between the states in the correlations you 

spoke of below?  In addition, weren't there correlations with other cancers 

other than lung?  That doesn't make much sense for radon, it may for 

smoking.



If you were starting out fresh now and your measurments were not a result of 

sales to people interested in their health or radon, how would you sample 

(number and sampling scheme) to get a set of data that could be used for 

risk analysis?



A more important data set may be the smoking data since this is the major 

cause of lung cancer.  How well does your smoking data predict the lung 

cancers?



Harry Hinks

harryhinks@hotmail.com



>From: Bernard L Cohen <blc+@pitt.edu>

>Reply-To: radsafe@romulus.ehs.uiuc.edu

>To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>

>Subject: Re: Sampling using summay data

>Date: Thu, 1 Mar 2001 10:44:42 -0600 (CST)

>

>	The justification for my data base on average radon levels in U.S.

>counties is very lengthy. I can give references to my papers in which it

>is discussed. It doesn't depend on any one set of measurements, like the

>EPA's. The convincing thing to me is that all measurement sets had good

>correlations, and each used independently gives the same results vs lung

>cancer rates.

>

>Bernard L. Cohen

>Physics Dept.

>University of Pittsburgh

>Pittsburgh, PA 15260

>Tel: (412)624-9245

>Fax: (412)624-9163

>e-mail: blc+@pitt.edu

>

>

>On Sun, 25 Feb 2001, Harry Hinks wrote:

>

> > Prof. Cohen,

> >

> > Does agreement with the EPA and other surveys that peformed limited 

>testing

> > per county justify using summary data for risk analysis (or to test the

> > LNT)?  THE EPA reports said that their surveys were just an indicator of

> > where elevated radon levels may occur.

> >

> > Harry

> >

> > harryhinks@hotmail.com

> >

> >

> > >From: Bernard L Cohen <blc+@pitt.edu>

> > >Reply-To: radsafe@romulus.ehs.uiuc.edu

> > >To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>

> > >Subject: Re: Sampling using summay data

> > >Date: Sat, 24 Feb 2001 19:28:24 -0600 (CST)

> > >

> > >On Fri, 23 Feb 2001, Harry Hinks wrote:

> > >

> > > > It is in the math.  I didn't realize Prof. Cohen performed 

>statistical

> > > > sampling when choosing which house to test in a given area?  I 

>thought

> > >the

> > > > data set came from individuals who wanted to test for radon becasue 

>of

> > > > health concerns or thought they may be living in a high radon area. 

>I

> > >wonder

> > > > if people who have increased concern about their health would have 

>lower

> > > > cancer rates?

> > >

> > >	-Several pages of my papers deal with the issue of justifying my

> > >average radon levels in various counties. I can give references if

> > >desired.

> > >Basically they deal with correlations between results from various 

>studies

> > >done by different state agencies, EPA, and careful random selection

> > >studies done by my group, and my entire file of measurements filtered 

>for

> > >elimination of the type of bias you suggest.

> > >I was really shocked to find how close these correlations were, and 

>that

> > >is what made me go on with this study.

> > >

> > 

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