I could be wrong, but I think loneway requires that the first variable
be the response and the second designate your group. So to compute ICC
of X and Y you would first want to reshape your data to be long, ie
instead of
id numX numY
1 25 32
2 12 17
you would type 'reshape num, i(id) string' to get
id num _j
1 25 X
1 32 Y
2 12 X
2 17 Y
Then 'loneway num numtype' should give you the ICC you are looking for.
Jacki
On 9/26/06, Joe Trubisz <[email protected]> wrote:
> In Martin Bland's book on medical statistics, he says:
>
> Sometimes we have pairs of observations where there is no obvious
> choice between X and Y. The choice of X and Y is arbitrary.
>
> He then goes on to discuss intraclass correlation.
>
> I have a set of data which meets this criteria and if I run 'loneway
> x y' and 'loneway y x', I get 2-different ICC values, which I can
> expect.
>
> However...what I don't know is what to do with the different values.
> Is one better than the other? How do I select which ICC value is
> actually the one I should be using?
>
> Thanks,
> Joe
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