st: Pseudo R-Squared in stcox

[Hanno Heitmann <hannoheitmann@yahoo.de>]

Hi statalist users,

does anybody know how exactly the pseudo-r-squared is computed which is reported in the saved result e(r2_p) of stcox? in my regressions it comes close to the nagelkerke pseudo-r-squared but doesn't matches it exactly.

I  would greatly appreciate any hints!

Regards, Hanno

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