topic Re: How to generate compact letter display from multiple comparisons in PROC LIFETEST? in Statistical Procedures

How to generate compact letter display from multiple comparisons in PROC LIFETEST?

rosta — Sun, 10 Dec 2023 11:43:26 GMT

I have 21 groups (treatments) for which I do survival analysis as follows:

proc lifetest data=CPB ;
time Days*Status(0);
strata Strain / test=logrank adjust=sidak;
run;

Is there a simple way of generating CLD from long table with pairwise comparisons similar to option "pdiff lines" in GENMOD PROC?

Thanks,

Rosta

Re: How to generate compact letter display from multiple comparisons in PROC LIFETEST?

OsoGris — Mon, 11 Dec 2023 15:52:16 GMT

There is nothing similar to the "pdiff lines" options for the ADJUST= option in PROC LIFEEST.

Re: How to generate compact letter display from multiple comparisons in PROC LIFETEST?

rosta — Wed, 27 Dec 2023 15:24:16 GMT

Thank you for the answer. If there is no such bult-in function in PROC LIFETEST, could anybody recommend any SAS script or even external tool to convert pairwise table to CLD table? I know it could be done manually but for long table it is not so easy (see example, complete table is about 5 times longer). Thank you.

Re: How to generate compact letter display from multiple comparisons in PROC LIFETEST?

sbxkoenk — Wed, 27 Dec 2023 23:41:23 GMT

Hello,

Unfortunately, PROC LIFETEST cannot generate an item store.
Otherwise you could subsequently use PROC PLM with LINES option on LSMEANS Statement.

See here :

Home > Analytics > Stat Procs >
Letter annotation for mean separation
https://communities.sas.com/t5/Statistical-Procedures/Letter-annotation-for-mean-separation/td-p/894807

Koen