topic Re: Weighted Kaplan Meier in Statistical Procedures

Weighted Kaplan Meier

longitudinal — Fri, 09 Dec 2016 15:43:01 GMT

Dear communities,

I am wondering if anyone can answer this question:

I want to get the weighted Kaplan Meier survival estimation/curve through Proc Phreg with "product-limit" option specified. However, I cannot find the background calculation/formula that SAS used to generate the survival estimation, could you point the paper I can refer to? The weight I am using is the ratio of the 1: M matched (case/control).

Thank you!

Re: Weighted Kaplan Meier

Rick_SAS — Fri, 09 Dec 2016 15:55:48 GMT

I don't know the answer to your exact question, but in case it helps, a general weighted cumulative distribution (similarly, a survival distribution) is adjusted by weights as explained in the article "Weighted percentiles."

Re: Weighted Kaplan Meier

longitudinal — Mon, 12 Dec 2016 15:19:57 GMT

Thank you! I will look into it.