Dear Bert,
thank you for suggestion. I am aware of R-help function. I must
apologize, my earlier question could lead to assumptions otherwise.
As you can see below, I only get Std. error but not lower and Upper CIs.
I was wondering if there is another argument or method, could give CIs
which I cannot find anywhere.
Thanks
Adrian
> Nsurv <-
survfit(Surv(NOSM,NStat)~as.factor(expcat1),conf.type='none',type='kaplan-meier')
> summary(Nsurv,time=c(12,24))
Call: survfit(formula = Surv(NOSM, NStat) ~ as.factor(expcat1),
conf.type = "none", type = "kaplan-meier")
1 observation deleted due to missingness
as.factor(expcat1)=DN
time n.risk n.event survival std.err
12 36 15 0.711 0.0629
24 21 8 0.535 0.0722
as.factor(expcat1)=UP
time n.risk n.event survival std.err
12 20 9 0.704 0.0833
24 9 9 0.359 0.0931
> sessionInfo()
R version 3.2.3 (2015-12-10)
Platform: i386-w64-mingw32/i386 (32-bit)
Running under: Windows 8.1 x64 (build 9600)
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United
States.1252 LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] survival_2.39-5
loaded via a namespace (and not attached):
[1] Matrix_1.2-6 splines_3.2.3 grid_3.2.3 lattice_0.20-33
On Sat, Aug 26, 2017 at 7:24 PM, Bert Gunter <bgunter.4567 at gmail.com>
wrote:> ???
>
> Both ?survit.object (linked in the see also section of ?survfit) and
> ?summary.survfit give you this information. Do you not know how to use
> R's help faciities -- in which case you should learn them now; see
> ?help -- or have I misunderstood your query?
>
> Cheers,
> Bert
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip
)
>
>
> On Sat, Aug 26, 2017 at 4:03 PM, Adrian Johnson
> <oriolebaltimore at gmail.com> wrote:
>> Hi
>> I am not sure hiw to get thr CI from summary function on the survfit
object.
>> I can get the percent survival for 2 years from survfit object but I
dont
>> get Confidence intervals
>> Could anyone suggest a hint
>> Thanks
>> Adrian
>>
>> [[alternative HTML version deleted]]
>>
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