[R] using a noisy variable in regression (not an R question)

[Charles C. Berry]

On Sat, 7 Mar 2009, Juliet Hannah wrote:

> Hi, This is not an R question, but I've seen opinions given on non R
> topics, so I wanted
> to give it a try. :)
>
> How would one treat a variable that was measured once, but is known to
> fluctuate a lot?
> For example, I want to include a hormone in my regression as an
> explanatory variable. However, this
> hormone varies in its levels throughout a day. Nevertheless, its levels differ
> substantially between individuals so that there is information there to use.
>
> One simple thing to try would be to form categories, but I assume
> there are better ways to handle this. Has anyone worked with such data, or could
> anyone suggest some keywords that may be helpful in searching for this


Try:

correction for attenuation

measurement error models

errors-in-variables

Wayne Fuller

LA Stefanski and RJ Carroll

William Cochran

HTH,

Chuck

> topic. Thanks
> for your input.
>
> Regards,
>
> Juliet
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901