Re: Re: Re: Source of cancer data

["John Williams" <JohnWi@law.com>]

Dr. Cohen,



In the 1999 paper, they said Cohen has yet to provide a persuasive 

argument for our findings in Iowa (Smith et al 1998) which 

predominately used your own aggregate data.



In the 1998 paper, they point out you used temporally flawed 

mortality data.   



1) You used lung cancer mortality rates from a time period before the 

the county radon exposure information you used.  Instead, the county 

averages should have been from 20 years or so before the lung cancer 

mortality data.





2) Their figure 2 shows the large slopes and error bars associated 

with the mortality data you used as compared to SEER incidence data.

I do not have your data or theirs on hand.  But, it looks easy to 

recalculate with the data in hand.



I'll let you do the math.



John Williams





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