Hello!
Maybe someone is able to help me here:
I want to compare the survival probabilities of patients treated with
two different kinds of medicine.
So I did the KM <- survfit(Surv(Time, Status),
type="Kaplan-Meier")
plot(KM)
for each group seperatly. But now I want to compare both treatments and
have both Kaplan-Meier Curves in one plot.
HOW CAN I DO THAT?
I tried add=TRUE, but that didn't work.
Thousand thanks in advance,
Verena