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In our previous example, we demonstrated how to calculate the Kaplan-Meier estimate of the survival function for time to event data. A related quantity is the Nelson-Aalen estimate of cumulative hazard. In addition to summarizing the hazard incurred by a particular timepoint, this quantity has been used in missing data models (see White and Royston, 2009). In addition to the usual SAS and R Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
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