Is there any R implementation of inverse probability weighted Kaplan-Meier estimator for left truncated and right censored data?
I found only implementation without left truncation in IPWsurvival package.
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$\begingroup$ Thanks for your answer. How I can understand that survfit() I used is considering left-truncation? $\endgroup$ – Ana Dec 12 '20 at 22:33
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$\begingroup$ Hello! In my opinion, you can see this by printing a Surv() object. If it looks like [200, 269+], then the left truncation is used. If it looks like 269+ – then the left truncation is not used. $\endgroup$ – Kess Dec 24 '20 at 12:05
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God, that was incredibly easy.
This can obviously be done with a conventional function survfit(). You need to assign desired weights to parameter w. Package IPWsurvival is needed only for the correct application of logrank test.
I hope this answer will save a lot of time for future researchers.
