If you have one continuous variable called "measure", which contains the
value of measure on each subject, and one variable called "subject" wich
contains the label of each subject, do
loneway measure subject
it will give you the intraclass correlation
For example:
mes sub
25 1
36 2
14 3
24 1
35 2
12 3
25 1
37 2
14 3
. loneway mes sub
One-way Analysis of Variance for mes:
Number of obs = 9
R-squared = 0.9931
Source SS df MS F Prob > F
Between sub 770.66667 2 385.33333 433.50 0.0000
Within sub 5.3333333 6 .88888889
Total 776 8 97
Intraclass Asy.
correlation S.E. [95% Conf. Interval]
------------------------------------------------
0.99311 0.00792 0.97759 1.00863
Estimated SD of sub effect 11.32025
Estimated SD within sub .942809
Est. reliability of a sub mean .9976932
(evaluated at n=3.00)
I Hope this helps
Alvine Bissery
*********************************************
Alvine Bissery
Biostatisticienne
H�pital Europ�en Georges Pompidou
Centre d' Investigations Cliniques
20-40 rue Leblanc
75 908 Paris Cedex 15
France
t�l: +33 1 56 09 29 13
fax: +33 1 56 09 29 29
mail: [email protected]
> -----Message d'origine-----
> De: Jeffrey Simons [mailto:[email protected]]
> Date: lundi 2 septembre 2002 00:08
> �: [email protected]
> Objet: st: Intraclass correlation?
>
>
> How can you do intraclass correlation coefficients in Stata
> for examining
> test-retest reliability?
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
