Journal
JOURNAL OF NUCLEAR CARDIOLOGY
Volume 24, Issue 6, Pages 1998-2003Publisher
SPRINGER
DOI: 10.1007/s12350-015-0296-z
Keywords
Survival analysis; c statistic; R-2 statistics; discrimination; predictive accuracy
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For time-to-event 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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