Dear stata users
Thank you to May for her helpful comments. In my example. I just have the
two categorical variables and chose to plot the survival curves for each
combination of levels of the two variables, thereby avoiding evaluating at
any means. I attempted to do the same thing in the - adjust for - option of
- stlist - (by putting each dummy variable in the - adjust for -) but it
didn't produce the same results. But given the opinion of the authors in the
book that May quotes that the "Confidence intervals and standard errors ..."
"can be quite inaccurate ...", it doesn't appear to be worth attempting to
extract the variance of the estimated cumulative hazard (if it is possible).
Many thanks again for the assistance.
Regards,
Neville
----------------------------------------------------------------------------
---------------------------------------------
Neville Verlander
Statistics Unit
Statistics, Modelling and Economics Department
Health Protection Agency Centre for Infections
61 Colindale Avenue
London
NW9 5EQ
Tel: (direct) (+44) 0208 3277426
Fax: (+44) 0208 7868
-----------------------------------------
**************************************************************************
The information contained in the EMail and any attachments is confidential
and intended solely and for the attention and use of the named
addressee(s). It may not be disclosed to any other person without the
express authority of the HPA, or the intended recipient, or both. If you
are not the intended recipient, you must not disclose, copy, distribute or
retain this message or any part of it. This footnote also confirms that
this EMail has been swept for computer viruses, but please re-sweep any
attachments before opening or saving. HTTP://www.HPA.org.uk
**************************************************************************
*
* 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/
