[R] [FORGED] p-value=0 running log-rank test
r.turner at auckland.ac.nz
Fri May 19 07:14:15 CEST 2017
This is not an R question.
Your question indicates that you really need to learn some statistics.
To answer the very last part:
And if that is not 0 to all intents and purposes, then God help us all.
On 19/05/17 12:48, Anne Karin da Mota Borges wrote:
> 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)
> 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.
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