Graph Harrell C index

[Luis Bertot]

Can anyone help me to graphically represents the Harrel's C index in Stata 14 ?

[Leonardo Guizzetti]

I'm curious what you hope to gain from a graphic. The c statistic is just a point estimate, so why not report it?

In the case of logistic regression, it is exactly the same as the area under the ROC curve, and that in turn can be plotted using -lroc- (I think that's correct). There is an analogy in Cox proportional hazard models for time to event data at a fixed point in time.

[Luis Bertot]

Thank you for your help . I am tryig to recreate the result of Harrells C after Cox proportional hazard model for time to event data in a graph to enhance results in a conference but i cannot find away to do it in Stata.

[Clyde Schechter]

Well, as Leonardo Guizzetti said in #2, the c-statistic is just a single number. This is just as true following Cox regression as it is following logistic regression. So making a graph for one number doesn't make sense.

[Luis Bertot]

Thank you for your useful comment, I really apreciatte the clarification .