Figure 5
From: External validation of a Cox prognostic model: principles and methods
![Figure 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2288-13-33/MediaObjects/12874_2012_Article_941_Fig5_HTML.jpg)
Empirical cumulative distribution functions of the PI by dataset and risk group. Solid lines, derivation data; dashed lines, validation data.
From: External validation of a Cox prognostic model: principles and methods
Empirical cumulative distribution functions of the PI by dataset and risk group. Solid lines, derivation data; dashed lines, validation data.