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

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New Contributor Gib
New Contributor
Posts: 4

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

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

Super User
Posts: 23,700

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

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...

 


@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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