[ RadSafe ] Excess relative risk

howard long hflong at pacbell.net
Sat Jan 12 11:13:56 CST 2008

What would make clear in that formula that kD is 
a NEGATIVE excess relative risk when radiation exposure is under ~20cGy (rad), rapid rate,  
i.e. hormesis?  +-kD?

Howard Long

----- Original Message ----
From: Otto G. Raabe <ograabe at ucdavis.edu>
To: radsafe at radlab.nl
Sent: Friday, January 11, 2008 12:11:10 PM
Subject: [ RadSafe ] Excess relative risk

January 11, 2008

If R=R(0)[1+kD] then the excess relative risk is kD.

Excess relative risk is {R-R(0)}/R(0) = {R(0)[1+kD]-R(0)}/R(0) =kD


Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754  FAX: (530) 758-6140
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