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The Stata Journal
Volume 17 Number 4: pp. 786-802



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Reconstructing time-to-event data from published Kaplan–Meier curves

Yinghui Wei
Centre for Mathematical Sciences
School of Computing, Electronics, and Mathematics
Plymouth University
Plymouth, UK
yinghui.wei@plymouth.ac.uk
Patrick Royston
MRC Clinical Trials Unit
University College London
London, UK
j.royston@ucl.ac.uk
Abstract.  Hazard ratios can be approximated by data extracted from published Kaplan–Meier curves. Recently, this curve approach has been extended beyond hazard-ratio approximation with the capability of constructing time-to-event data at the individual level. In this article, we introduce a command, ipdfc, to implement the reconstruction method to convert Kaplan–Meier curves to time-to-event data. We give examples to illustrate how to use the command.
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View all articles with these keywords: ipdfc, time-to-event data, Kaplan–Meier curves, hazard ratios

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