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Re: st: intraclass correlation for Categorical data
From
Steven Samuels <[email protected]>
To
[email protected]
Subject
Re: st: intraclass correlation for Categorical data
Date
Fri, 13 May 2011 13:57:18 -0400
John-
There are many types of correlations for binary data. -findit xtrho- will lead to an ado file for binary data analyzed by -xtlogit- and to an associated (free) Stata Journal article. I also give a direct computation which will work for negative correlations as well.
Steve
[email protected]
*************************
webuse union, clear
gen index=_n
xtlogit union, i(id)
xtrho
loneway union id
/* Direct Computation
(Fleiss Levin Paik, Statistical Methods for Rates & Proportions
Third Ed, 2003, Wiley , p 443) */
keep union index id
tempfile t1
save `t1'
rename union union1
rename index index1
joinby id using `t1'
drop if index==index1
corr union union1
return list
************************
On May 12, 2011, at 4:44 PM, John Litfiba wrote:
Dear Statalist,
I was wondering is there is a way in stata to obtain an intraclass
(within cluster) correlation for categorical variables...
There exist -loneway- but it is only for continuous variables...
Many thanks
John
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