I am using the inverse-probability method published by Cole et al (Adjusted survival curves with inverse probability weights) to create my weights however instead of using these weights in the COX procedure, proc phreg, I would like to use them in Proc Lifetest. proc lifetest data=SDEHP3 plots=(s) graphics outsurv=ph2_survival; time phage*phcensor1(1);strata dhCAT ; freq stw; run; The benefit is that I can use the medians with confidence intervals as my adjusted median survival times for each strata where as in Cox there are no ages with confidence intervals. Does anyone see a problem with using inverse probability weights in the weight statement of proc lifetest to produce adjusted KM curves? Thanks!

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