https://communities.sas.com/t5/Statistical-Procedures/using-baseline-function-in-proc-phreg-with-strata-and-diradj/m-p/983407#M49231 <P><SPAN>The BASELINE data set will contain, for every covariate pattern, an observation at each unique event time.&nbsp;&nbsp; If you have a stratified model, i.e. - are using the STRATA&nbsp;&nbsp;statement, then this architecture continues for each strata.&nbsp; This holds true when you also use the DIRADJ because it is based upon the stratum-specific&nbsp;estimated survival function.&nbsp; For the specific details about the&nbsp;direct adjusted survival curve for each&nbsp;stratum, please see the link to the documentation below.</SPAN></P> <P><SPAN><A href="https://go.documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/statug/statug_phreg_details65.htm#statug.phreg.phrdetdiradj" target="_blank">SAS Help Center: Survivor Function Estimators</A></SPAN></P> Thu, 12 Feb 2026 15:31:50 GMT SAS_Rob 2026-02-12T15:31:50Z https://communities.sas.com/t5/Statistical-Procedures/using-baseline-function-in-proc-phreg-with-strata-and-diradj/m-p/983364#M49226 <P>if i have a variable for strata in a proc phreg and i am computing the baseline hazard function using diradj, will the computations within the strata be based on the covariate distribution in the whole data set or only that in each stratum?</P><P>&nbsp;</P> Wed, 11 Feb 2026 18:59:51 GMT https://communities.sas.com/t5/Statistical-Procedures/using-baseline-function-in-proc-phreg-with-strata-and-diradj/m-p/983364#M49226 ehertzmark 2026-02-11T18:59:51Z https://communities.sas.com/t5/Statistical-Procedures/using-baseline-function-in-proc-phreg-with-strata-and-diradj/m-p/983407#M49231 <P><SPAN>The BASELINE data set will contain, for every covariate pattern, an observation at each unique event time.&nbsp;&nbsp; If you have a stratified model, i.e. - are using the STRATA&nbsp;&nbsp;statement, then this architecture continues for each strata.&nbsp; This holds true when you also use the DIRADJ because it is based upon the stratum-specific&nbsp;estimated survival function.&nbsp; For the specific details about the&nbsp;direct adjusted survival curve for each&nbsp;stratum, please see the link to the documentation below.</SPAN></P> <P><SPAN><A href="https://go.documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/statug/statug_phreg_details65.htm#statug.phreg.phrdetdiradj" target="_blank">SAS Help Center: Survivor Function Estimators</A></SPAN></P> Thu, 12 Feb 2026 15:31:50 GMT https://communities.sas.com/t5/Statistical-Procedures/using-baseline-function-in-proc-phreg-with-strata-and-diradj/m-p/983407#M49231 SAS_Rob 2026-02-12T15:31:50Z