Authors: Seth T Lirette Inmaculada Aban
Publish Date: 2015/10/19
Volume: 24, Issue: 6, Pages: 1998-2003
Abstract
For timetoevent outcomes in medical research survival models are the most appropriate to use Unlike logistic regression models quantifying the predictive accuracy of these models is not a trivial task We present the classes of concordance C statistics and R 2 statistics often used to assess the predictive ability of these models The discussion focuses on Harrell’s C Kent and O’Quigley’s R 2 and Royston and Sauerbrei’s R 2 We present similarities and differences between the statistics discuss the software options from the most widely used statistical analysis packages and give a practical example using the Worcester Heart Attack Study dataset
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