Re: Confounders and Coincidences

["Otto G. Raabe" <ograabe@UCDAVIS.EDU>]

May 8, 2003

Davis, CA



Dear Bernie:



I propose that living in a formerly Confederate State has a confounding

effect on the relationship of radon exposure and cigarette smoking and lung

cancer. Remove all the formerly Confederate States of the "deep South" from

your analysis and see if your result is markedly changed.



Otto

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

Prof. Otto G. Raabe, Ph.D., CHP

Center for Health & the Environment

(Street Address: Bldg. 3792, Old Davis Road) 

University of California, Davis, CA 95616

E-Mail: ograabe@ucdavis.edu

Phone: (530) 752-7754   FAX: (530) 758-6140

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