Not as such but the surgery results in an increase in both variables (serum markers) so I'd assume if they are correlated it would be more apparent at high concentrations ie. year 1 and 2
Sent from my iPhone
On 17/03/2013, at 1:35 PM, "David Hoaglin" <dchoaglin@gmail.com> wrote:
> As I read the initial description, the data have a bivariate dependent
> variable (a and b) and no independent variable (other than time).
>
> Do the data show evidence that the surgery alters the correlation
> between a and b?
>
> David Hoaglin
>
> On Sat, Mar 16, 2013 at 10:57 PM, JVerkuilen (Gmail)
> <jvverkuilen@gmail.com> wrote:
>> On Sat, Mar 16, 2013 at 10:46 PM, megan rossi <megan_rossi@msn.com> wrote:
>>> Hi All
>>> With xtmixed is there a post estimate command that will give you the correlation coefficient between the dependent and independent variable? The intraclass correlation gives you the correlation between the dependent and the levels, but I am after the dependant and independent correlation.<<
>>
>> Essentially the strength of relationship is measured by the regression
>> coefficient. This asymmetry is part of what a regression does.
>
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