The meaning of "mean" for categorical variables in stcurve

[Andrzej Niemierko]

In the Stata manual, there is an example of using the -stcurve- command after fitting a Cox regression model with one continuous (age) and one binary (drug) variable:

stcurve, survival

The note below it states, "Note: function evaluated at overall means of covariates."
What does "mean" of the binary (0.1) variable drug mean?
Thanks,
Andrzej

[Leonardo Guizzetti]

The mean is the literal application of the average to a variable whose values are 0 or 1. In other words, it’s the proportion of the group indicated by the value of 1.

[Andrzej Niemierko]

That's what I thought, but I wanted to make sure.
Thanks, Leonardo.