topic Landmark curve and adjustment for multiple comparison for the logrank test for each landmark in Statistical Procedures

Landmark curve and adjustment for multiple comparison for the logrank test for each landmark

SJ04 — Tue, 31 May 2016 20:24:35 GMT

I want to do a landmark 1, 3 and 5 years analysis in SAS
i google it get information but i could not find it.

if i want to do the example data from sas website
https://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_lifetest_sect019.htm

how can i do it using the survival probability landmark curve for
0-500, more than 500 days and do the adjusted logrank for group by landmark.

similar graph in the attachement but i want to use the survival probability.

any advice i really appriciate.

Thanks very much

Re: Landmark curve and adjustment for multiple comparison for the logrank test for each landmark

Reeza — Tue, 31 May 2016 21:45:01 GMT

I'm not familiar with the term landmark curve but KM/survival curves appear to be what your after? I couldn't find anything via Google either, what's the subject area?

I'm moving your post to the Stats forum so it can hopefully get a better response there.

Re: Landmark curve and adjustment for multiple comparison for the logrank test for each landmark

SJ04 — Tue, 31 May 2016 23:55:10 GMT

Hi Reeza,

thanks for your reply

it's survival analysis. my follow up time 1 day to 12 years

i did a km curve for my data for 12 years period, treatmetn group has 4 (0,1,2,3)

i did it in stata, but they don't have adjusted logrank test ( i can find the answer for online), so

i found SAS command , i decided to use SAS for my analysis

to do the adjusted logrank test.

then i divide the data into 0-1 year( after 1 year if they died it's censored)

then i divide the data into 2 to 3 years and 4 to 5 years

i did example in stata and SAS for adjustment for logrank test

data i took it from your website.

https://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_lifetest_sect019.htm

i am attaching the file

thanks

Sugi