Re: Radon and Smoking

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

On Tue, 12 Feb 2002, Kai Kaletsch wrote:



> If radon measurements for cases in a case-control study are made after the

> case quits smoking or when only non-smoking relatives are living in the

> residence, then the radon exposure assessment would overestimate the actual

> historical radon exposure of the smoking cases. If we subtracted 10% from

> the geometric mean radon concentration of the cases (almost all ever

> smokers) in the Iowa study, the difference between cases and controls would

> be eliminated.



	--An interesting point. In most situations, once a lung cancer has

been experienced, the smoking stops.



> Dr Cohen:

>

> Do you have any data which would indicate if the smoking-radon association

> is causal or not? For example, is the radon concentration in ex-smokers

> houses similar to that in smokers homes or to that in non-smokers homes?



	--The only data I have is the number of cigarettes smoked per day

in the house.These data are in Tables 2 & 3 of my paper in Health Physics

60:631-642;1991





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