Log-rank test

[tejas singh]

Hi All,

Can I please request some advice on the following.
I have produced a Kaplan Meier Curve looking at a variable that is grouped in tertiles (i.e three groups)
By default, the log-rank test in stata compares all three tertiles.
I was wondering whether there was a way to compare two specific tertiles rather than considering all groups ? (i.e log-rank between tertile 1 and tertile 3).
Does anyone know how this could be done ?

Many thanks,

Tejas.

[Øyvind Snilsberg]

I might be missing something but,

sts test variable if variable != 2