RE: Re: Source of cancer data

[Jack_Earley@RL.GOV]

As I recall, don't smokers typically understate the severity of their habit?

I assumed Dr. Cohen used sales taxes because it was more objective and

immediately available.



Jack Earley

Radiological Engineer





-----Original Message-----

From: John Williams [mailto:JohnWi@law.com]

Sent: Monday, December 31, 2001 3:19 AM

To: RuthWeiner@aol.com; hflong@postoffice.pacbell.net; johnwi@law.com

Cc: radsafe@list.vanderbilt.edu

Subject: Re: Re: Source of cancer data





Ruth,



In a case control study, the control of confounding such as smking 

rate and duration is performed at the level of the individual.  The 

interviewer asks each respondent about thir smoking history.  I used 

smoking as an example, but it also relates to other data that is 

collected.  In the ecologic study, Cohen used sales tax to infer 

smoking rates for the county.



  



Sent by Law  Mail

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