[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Confounders and Coincidences



On Thu, 8 May 2003 epirad@mchsi.com wrote:



> Dr. Cohen wrote -

>

> >

> > 	--In my study, there is no need to do this. Ethnicities are among

> > the confounding factors I treat.

> ----------------------------------------------

>

> Unfortunately, ecological control of a covariate contributing to ecologic bias

> is generally inadequate to remove the bias produced by the covariate even in

> the absence of measurement error.



	--Give me a concrete numerical example (it can be "made-up") of

what you mean here



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

You are currently subscribed to the Radsafe mailing list. To unsubscribe,

send an e-mail to Majordomo@list.vanderbilt.edu  Put the text "unsubscribe

radsafe" (no quote marks) in the body of the e-mail, with no subject line.

You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/