sts graph, by (group)

[Ditte Drejer]

Hi
I am having trouble with my survival data and graphs. It seems that on the graph, everyone has a failure despite that I have entered ==1 on the failure variable.
I have stset my data and got:

. stset obs_time_m12_m4 if m12_FinishedinProject ==1, failure( PathologyFindings_m4_tumor )scale(365.25)

failure event: PathologyFindings_m4_tumor != 0 & PathologyFindings_m4_tumor < .
obs. time interval: (0, obs_time_m12_m4]
exit on or before: failure
t for analysis: time/365.25
if exp: m12_FinishedinProject ==1


699 total observations
351 ignored at outset because of -if <exp>-

348 observations remaining, representing
130 failures in single-record/single-failure data
254.294 total analysis time at risk and under observation
at risk from t = 0
earliest observed entry t = 0
last observed exit t = 1.336071


then;
sts graph, by (PatientProtocol_n) ci risktable

The graph that appears is showing 348 at risk, but by the end time, everyone seems to have had a failure.

Can anyone explain to me, what I have missed? I have been reading through many FAQs and PDF helps and video tutorials.
I am very grateful if someone can help.

Thanks,
Ditte

[Ditte Drejer]

Sorry. I am using STATA 14.2

[Weiwen Ng]

Ditte, please post on the main forum. This is for Mata, which is Stata's matrix language.

Also, please read the FAQ - an example would help, and the user-written command -dataex- can produce a snapshot of your data so that anyone can replicate your sample and work on it.