https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794322#M38957 <P>The pointwise confidence limits for the survival function are in the OUTSURV= dataset.&nbsp; This is an option on the PROC LIFETEST statement.&nbsp;</P> Thu, 03 Feb 2022 18:51:09 GMT OsoGris 2022-02-03T18:51:09Z https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794136#M38941 <P>Hi,&nbsp;</P><P>I have two strata output from proc lifetest. How can I calculate&nbsp;a single confidence interval from both results&nbsp; from the Survival Standard Error in the two tables below?</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="pic1.png" style="width: 674px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/68168i53A58C8D8F395AD6/image-size/large?v=v2&amp;px=999" role="button" title="pic1.png" alt="pic1.png" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="pic2.png" style="width: 649px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/68167i6B5544F575E3757F/image-size/large?v=v2&amp;px=999" role="button" title="pic2.png" alt="pic2.png" /></span></P> Wed, 02 Feb 2022 23:01:02 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794136#M38941 CathyVI 2022-02-02T23:01:02Z https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794314#M38953 <P>A confidence interval for what?&nbsp; What is the population parameter for which you want an interval estimate?&nbsp; Can you get PROC LIFETEST to give you a point estimate for that parameter?</P> Thu, 03 Feb 2022 18:14:12 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794314#M38953 Rick_SAS 2022-02-03T18:14:12Z https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794322#M38957 <P>The pointwise confidence limits for the survival function are in the OUTSURV= dataset.&nbsp; This is an option on the PROC LIFETEST statement.&nbsp;</P> Thu, 03 Feb 2022 18:51:09 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculate-Confidence-interval-from-Survival-Standard-Error/m-p/794322#M38957 OsoGris 2022-02-03T18:51:09Z