[ RadSafe ] Excess relative risk

howard long hflong at pacbell.net
Sun Jan 27 12:56:44 CST 2008

Is not, "negative excess risk", or less risk of a heart attack, cancer, death, etc,
the reason you exercise, diet, take low dose ASA, and I also sit on thoriated welding rods, John?

We don't wait for "proof" before doing an appendectomy, either, 
believing that the injury from waiting is greater than the injury from occasionally operating unnecessarily.

Howard Long 

----- Original Message ----
From: John Jacobus <crispy_bird at yahoo.com>
To: howard long <hflong at pacbell.net>; Otto G. Raabe <ograabe at ucdavis.edu>; radsafe at radlab.nl
Sent: Saturday, January 26, 2008 2:08:48 PM
Subject: Re: [ RadSafe ] Excess relative risk

Of course, there is no proof of negative excess risk.  

howard long <hflong at pacbell.net> wrote:
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 
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


"If history teaches any lesson it is that no nation has an inherent right to greatness. Greatness has to be earned and continually re-earned."
- Norman Augustine, Chairman of the National Academies Committee 

-- John
John Jacobus, MS
Certified Health Physicist
e-mail: crispy_bird at yahoo.com

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