Confidence interval of survival probabilities when only time and survival data are available

[Gib]

Hi,

I have a data with the Time and Survival variables. I am wondering how I can calculate the 95% confidence interval of the Survival probabilities. I found this in Excel ( http://www.real-statistics.com/survival-analysis/kaplan-meier-procedure/confidence-interval-for-the-...), but I am curious if it can be done with SAS in an easier way?

My data looks like this:

Time Survival
0 1
1 0.99212
2 0.93231
3 0.91655
4 0.96456
…

Thanks,
gib

[Reeza]

If you're using PROC LIFETEST then you can use the SURVOUT option on PROC LIFETEST. This will output a dataset with the KM estimates and the confidence intervals. There's similar options if you're using LIFEREG or PHREG procedures.

http://support.sas.com/documentation/cdl/en/statug/68162/HTML/default/viewer.htm#statug_lifetest_det...

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@Gib wrote:

Hi,

I have a data with the Time and Survival variables. I am wondering how I can calculate the 95% confidence interval of the Survival probabilities. I found this in Excel ( http://www.real-statistics.com/survival-analysis/kaplan-meier-procedure/confidence-interval-for-the-...), but I am curious if it can be done with SAS in an easier way?

My data looks like this:

Time Survival
0 1
1 0.99212
2 0.93231
3 0.91655
4 0.96456
…

Thanks,
gib

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