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st: different stcox output when used in a program


From   Michael McCulloch <mm@pinest.org>
To   Statalist <statalist@hsphsun2.harvard.edu>
Subject   st: different stcox output when used in a program
Date   Sun, 5 Aug 2007 08:35:45 -0700

Using the same simple stcox command, Stata 9.2 outputs the hazard ratio when I issue the command, but the coefficient when I use it within a program. I'd like to learn how to obtain the hazard ratio within my simple program.

FROM COMMAND LINE:
. stcox tcm if stage==1
------------------------------------------------------------------------------
_t | Haz. Ratio Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
tcm | .7800136 .2798863 -0.69 0.489 .3860754 1.575913
------------------------------------------------------------------------------


FROM PROGRAM:
. program define bootgcomp
1. stcox tcm if stage==1
2. end
. set seed 12358
. bootstrap, reps(1000): msmcox_stageII
------------------------------------------------------------------------------
| Observed Bootstrap Normal-based
_t | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
tcm | -.2484439 .351693 -0.71 0.480 -.9377495 .4408616
------------------------------------------------------------------------------

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