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Re: st: RE: Kappa query - unequal distribution of scores (Away)
From
"Seyi Soremekun" <[email protected]>
To
<[email protected]>
Subject
Re: st: RE: Kappa query - unequal distribution of scores (Away)
Date
Thu, 22 Sep 2011 10:10:57 +0100
I am away from the 21st September until the 12th October. Please direct any urgent enquiries to Linda Vesel ([email protected]).
Seyi
>>> "Downs, Sara" <[email protected]> 09/22/11 10:06 >>>
Hi,
I am trying to calculate agreement between 2 distributions of scores.
There are 3 possible scores: One score predominates and the other 2 are
extremely rare :
tab rev1 rev2
| rev2
rev1 | 0 1 2 | Total
-----------+---------------------------------+----------
0 | 1 6 0 | 7
1 | 13 57 3 | 73
2 | 0 2 1 | 3
-----------+---------------------------------+----------
Total | 14 65 4 | 83
. kap rev1 rev2
Expected
Agreement Agreement Kappa Std. Err. Z Prob>Z
-----------------------------------------------------------------
71.08% 70.47% 0.0206 0.0852 0.24 0.4042
I understand that the usual kappa statistic is not reliable in this
situation . Is there any way in STATA that I can adjust for the high
expected frequency. I am using STATA 10.1.
Thanks for any advice
Sara
Dr Sara Downs
CERA (Centre for Epidemiology & Risk Analysis)
Veterinary Laboratories Agency - Weybridge
New Haw
Addlestone
Surrey
KT15 3NB
United Kingdom
Phone: +44 (0) 1932 357893
Fax: +44 (0) 1932 357406
x2893
Animal Health and Veterinary Laboratories Agency (AHVLA)
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