Dear all,
I have a question concerning the p-value. When running log-rank test I get
a p-value = 0.
What is it mean? Can this be true? Why aren´t there decimal points? Is
there a way to find out the exact p-value?
Here is the output:
> survdiff(Surv(tempo2,status)~tphist, data=base,rho=0)
Call:
survdiff(formula = Surv(tempo2, status) ~ tphist, data = base,
rho = 0)
N Observed Expected (O-E)^2/E (O-E)^2/V
tphist=1 513 19 40.879 11.710 9.00e+01
tphist=2 49 4 3.892 0.003 3.27e-03
tphist=3 23 9 1.686 31.717 3.29e+01
tphist=4 18 15 0.543 385.172 3.91e+02
Chisq= 430 on 3 degrees of freedom, p= 0
Thank you in advance.
Anne.
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
