Re: lung cancers, primary vs secondary

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

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



> We have shown that your existing mortality data does not validly predict lung

> cancer mortality for the period of interest.



	--If you are saying that NCHS statistics do not give valid

mortality rates, please explain what you mean. If you are raising the

issue of time periods, I treat that as a question of variation of average

radon levels bewteen the time when the lung cancers were presumably caused

and the time when the measurements were made. I have discussed that

subject in my papers and very recently on RADSAFE, for example noting that

the problem is much worse in the great majority of case-control studies.



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