topic How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG in New SAS User

How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

cnetphil — Tue, 27 Nov 2018 14:54:35 GMT

hello,

I would like to extract CI of (Bi+Rij) from zph output or output statment of PHREG.

Bi+ Rij represent Beta estimates weighted by standardized shoenfeld residuals.

Do you know option or the exact equation for calulating these CIs.

Thank you in advance,

cnetphil.

Re: How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

PeterClemmensen — Tue, 27 Nov 2018 14:58:47 GMT

Welcome to the SAS community. Can you show us your code?

Re: How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

cnetphil — Tue, 27 Nov 2018 15:06:11 GMT

from example :

proc phreg data=Rats zph(out=zph);
model Days*Status(0)=Group;
output out=output ressch=ressch wtressch=wtressch xbeta=beta;
run;

the zph table gives (Bi+Rij) and days of cases.

the output table gives Bi and Rij so I can also caculate Bi+Rij by a simple addition.

But I cannot extract CI of (Bi+Rij) and I do not find the exact equation for calculating that.

Thanks in adavance,

centphil.

Re: How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

Reeza — Tue, 27 Nov 2018 17:06:09 GMT

You likely need a customized ESTIMATE statement to get your estimates.
https://documentation.sas.com/?cdcId=statcdc&cdcVersion=14.2&docsetId=statug&docsetTarget=statug_phreg_syntax.htm&locale=en

Re: How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

cnetphil — Tue, 27 Nov 2018 18:59:06 GMT

thanks for your response,

Could you specify the exact statment option for obtaining adequate output of CI for ( Bi+ RIj) extimates and not only Beta estimates for linear predicators?

Thanks in advance,

sincerely,

cnetphil

Re: How Do I Extract CI of (Bi + Rij) in ZPH output or output statment of PHREG

Reeza — Tue, 27 Nov 2018 19:30:06 GMT

Unfortunately that part I don't have time for. Estimates statements are complicated and each time I do them, I essentially re-learn them.
https://blogs.sas.com/content/sastraining/2012/05/02/estimate-statements-the-final-installment/