Re: Cohen's Observation

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

On Sat, 21 Jun 2003 epirad@mchsi.com wrote:



> Please provide a concrete example of how you accounted for inter county

> variability



	--Intercounty variability of what? Of lung cancer rates, by the

fact that there are various causes of lung cancer and of peoples'

susceptibility to it and these vary from one county to another. Og radon

levels, by differences in geology and in house construction practices.



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