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Re: st: Query for Statalist on kappa


From   Ron�n Conroy <[email protected]>
To   [email protected]
Subject   Re: st: Query for Statalist on kappa
Date   Tue, 19 Dec 2006 14:52:43 +0000

On 17 Noll 2006, at 06:10, Meredith Makeham wrote:

In addition, the third level of the code has a few cells with very small values in them (<5), and three of the outcomes for code 1 at level 3, and one for code 2 at level 3, have a negative value for their individula kappa statistic. What does this mean, and should I not be doing this test if the cell size is smaller than a certain number?
A negative kappa means that the raters disagreed more than you would expect by chance alone. They may have been married.

I would recommend thinking about Lin's concordance coefficient, since your data are ordinal; check out -concord-.



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Ron�n Conroy
Royal College of Surgeons in Ireland
[email protected]
+353 (0) 1 402 2431
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