Dear Stata-Listers
Apologies if this has been previously received (yesterday), but I could not
see it on the Stata-list archives and I think I was dis-connected at the
time of sending:
There are numerous entries in �search� for interactions in Stata, but
somewhat surprisingly, none (including �findit�) for the �Gail-Simon� test
for qualitative interactions (M. Gail and R. Simon. Testing for Qualitative
Interactions between Treatment Effects and Patient Subsets. Biometrics 41
(2):361-372, 1985).
This test has been used frequently, albeit with some degree of controversy,
in the medical trial literature and has also been featured in the excellent
text: A Dmitrienko, Geert Molenberghs, C. Chuang-Stein, and W. W. Offen.
Analysis of clinical trials using SAS: A practical guide, Cary, NC:SAS
Institute Inc., 2005.
Not having access to SAS (!!), � I wonder if anyone has coded this test in
Stata?
Thanks in advance
John Moran
Department of Intensive Care Medicine
The Queen Elizabeth Hospital
28 Woodville�Road
Woodville SA
Australia
Tel 61 08 8222 6463
Fax 61 08 8222 6045
Mobile 0414 267 529
E-mail: [email protected]
*
* 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/
