Linearity of covariates and radon exposure - Concrete "theoretically" plausible explanantion!

[epirad@mchsi.com]

Dr. Cohen, 



As I stated before, if you want a "concrete" "theoretical" explanation of your 

findings other than the use of suspect data and a misspecified model, please 

change the percentages below in Dr. Lubin's example to various plausible 

percentages and factor in plausible ranges of dynamic within county co-variate 

socioeconomic factors (also dynamically varying between counties) related to 

smoking and perform Monte Carlo analyses or sensitivity analyses.



Bill Field 



********************

> 

> On Mon, 23 Jun 2003 epirad@mchsi.com wrote:

> 

> > I placed a copy of Dr. Lubin's paper in the mail.  Please email me directly if

> > anyone else would be interested in a copy of the paper.

> 

> 	--My response to that paper, Jour. Rad. Prot. 22(2002)305-307, is

> available on the web at    http://www.iop.org/EJ/toc/0952-4746/22/3  The

> problem is that it contains no consideration of plausibility. For example.

> it hypothesizes that the ratio of radon exposures for smokers/non-smokers

> in a county varies with county average radon levels, r, from 7.0 for r=30,

> to 1.0 for r=75, to 2.2 for r=90, to 0.36 for r=150; all this at a time

> when nothing was known about radon levels.

> 

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