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From |
"Martin Weiss" <[email protected]> |

To |
<[email protected]> |

Subject |
Re: Stcox ereturn list: wrong chi2 p-value?s |

Date |
Sun, 21 Sep 2008 13:19:51 +0200 |

I agree with you that if the p-value is given in the output, it would be nice to have it posted to the results for convenience. It is not always as straightforward to calculate as in this case.

As a matter of fact, Stata does not report the p-values for the parameter estimates, either, though. It merely gives you the point estimates in e(b) and the varcov in e(V). Luckily, -ssc d parmest- allows one to access the p-values without fuss...

HTH

Martin

_______________________

----- Original Message ----- From: "junin" <[email protected]>

To: <[email protected]>

Sent: Sunday, September 21, 2008 1:11 PM

Subject: Re: Stcox ereturn list: wrong chi2 p-value?s

Thanks a lot Martin, that helped a lot. I just thought that these values are already stored somewhere, since they are reported when running the analysis. However calculating it by myself, then storing it with estadd, works just fine. Then it is also easy to use it with outreg2 using the addstats() option. Again, thanks for the help, dirk 2008/9/21 Martin Weiss <[email protected]>:I would not know how to do this with -outreg2-, but if you could be bothered

to use the -estout- family of commands, then

********

clear*

cap ssc inst estout

webuse stan3, clear

stset

stcox age posttran surg yea

estadd sca prchi2= 1-chi2(e(df_m),e(chi2))

eststo

esttab, sca(prchi2)

********

Tweak the -esttab- line to your needs, i.e. Latex output or csv... See -h

esttab-

HTH

Martin

_______________________

----- Original Message ----- From: "junin" <[email protected]>

To: <[email protected]>

Sent: Sunday, September 21, 2008 11:52 AM

Subject: Stcox ereturn list: wrong chi2 p-value?s

Hello,

I have a question concerning the output of a Cox regression, which I

want to access with outreg2. Below you find the results of the Cox

regression command as well as the ereturn list results. My question

is: Why doesn't the e(r2_p) = .0006402283288656 repor the Prob >

chi2 = 0.0025?

How can I access the Prob > chi2?

Thank you for you help,

dirk

Cox regression -- Breslow method for ties

No. of subjects = 1970 Number of obs = 15654

No. of failures = 1065

Time at risk = 15654

LR chi2(1) = 9.17

Log likelihood = -7153.7882 Prob > chi2 =

0.0025

------------------------------------------------------------------------------

_t | Haz. Ratio Std. Err. z P>|z| [95% Conf.

Interval]

-------------+----------------------------------------------------------------

Xsales | .99992 .0000413 -1.94 0.053 .9998391 1.000001

------------------------------------------------------------------------------

. ereturn list

scalars:

e(N) = 15654

e(ll_0) = -7158.37122089778

e(ll) = -7153.788228853626

e(df_m) = 1

e(chi2) = 9.165984088309415

e(r2_p) = .0006402283288656

e(N_sub) = 1970

e(N_fail) = 1065

e(risk) = 15654

*

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* http://www.stata.com/help.cgi?search

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* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/-- Dirk Volland mobile +358468948277 skype junin7 ! new Email: [email protected] * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: Stcox ereturn list: wrong chi2 p-value?s***From:*Maarten buis <[email protected]>

**References**:**Stcox ereturn list: wrong chi2 p-value?s***From:*junin <[email protected]>

**Re: Stcox ereturn list: wrong chi2 p-value?s***From:*"Martin Weiss" <[email protected]>

**Re: Stcox ereturn list: wrong chi2 p-value?s***From:*junin <[email protected]>

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