Re: Linearity of covariates and radon exposure

[BERNARD L COHEN <blc+@PITT.EDU>]

On Fri, 27 Jun 2003 epirad@mchsi.com wrote:



> Cohen wrote earlier today:  "I do not assume linearity of lung cancer risk with

> smoking. I use the BEIR treatments. Note that the BEIR Committees include

> epidemiologists."

>

> I sincerely do not see how the above statement can be justified.



	--They are straightforward statements of fact. BEIR-IV gives

different risks for smokers and non-smokers, and I use these to derive my

basic formula in item #1 on my web site. BEIR-VI suggests that a

distinction be made between one pack/day and two pack/day smokers and I do

that (see Sec.4.4 of item #7 on my web site). Where do I assume linearity

of lung cancer risk with smoking?



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