Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Date: Thu, 5 Feb 2004 16:05:09 -0600


From   "Cram, Peter" <peter-cram@uiowa.edu>
To   "'statalist@hsphsun2.harvard.edu.'" <statalist@hsphsun2.harvard.edu>
Subject   st: Date: Thu, 5 Feb 2004 16:05:09 -0600
Date   Thu, 5 Feb 2004 17:05:50 -0500 (EST)

Dear Statalist,

I am running the following logistic regression model.


xi: logistic mort30 SpecHosp age i.sex i.race alcohol_ex arrhyth_ex



However I have hospitals clustered within regions (variable hrrnum) and
patients clustered within hospitals (variable prov_num).

I have been able to run my regression with a single cluster included:

xi: logistic mort30 SpecHosp age i.sex i.race alcohol_ex arrhyth_ex, cluster
(hrrnum)


but am unable to run the model with 2 clusters because I receive error
messages each time I do so.

xi: logistic mort30 SpecHosp age i.sex i.race alcohol_ex arrhyth_ex, cluster
(hrrnum) cluster (prov_num)


How can I account for the 2 levels of clustering in my data in my regression
model?

Thanks,
Pete 
*
*   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index