BookmarkSubscribeRSS Feed
Ke4
Calcite | Level 5 Ke4
Calcite | Level 5

Hi,

In proc LIFETEST it's possible to create confidence intervals for the survival function at a particular point in time (i.e. a landmark time point).  Does LIFETEST or any other SAS procedure also perform a test of this?

 

More detail: I'm trying to recreate equation 3 which is based on the log-log transformation in Klein 2007 "Analyzing survival curves at a fixed point in time" DOI: 10.1002/sim.2864  

2023-05-11 18_51_06-Statistics in Medicine - 2007 - Klein - Analyzing survival curves at a fixed poi.png

where

2023-05-11 18_54_35-Statistics in Medicine - 2007 - Klein - Analyzing survival curves at a fixed poi.png

Many thanks

1 REPLY 1
Reeza
Super User
OUTSURV data set will have the estimate and CI for all times. You find the closest time point prior to the time of interest. You can see the point estimates if you use the TIMELIST option and the OUTSURV will have the confidence intervals for the time points.

SAS Innovate 2025: Save the Date

 SAS Innovate 2025 is scheduled for May 6-9 in Orlando, FL. Sign up to be first to learn about the agenda and registration!

Save the date!

What is Bayesian Analysis?

Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.

Find more tutorials on the SAS Users YouTube channel.

SAS Training: Just a Click Away

 Ready to level-up your skills? Choose your own adventure.

Browse our catalog!

Discussion stats
  • 1 reply
  • 717 views
  • 2 likes
  • 2 in conversation