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Harrell's C following a Cox regression (IBM ref #1478383)

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cbrawner

Harrell's C following a Cox regression (IBM ref #1478383)

I am trying to use the syntax from a IBM SPSS technical note (reference #1478383; link below) to calculate Harrell's C (eg, C-index, C-statistic):

http://www-01.ibm.com/support/docview.wss?uid=swg21478383

At the bottom of this syntax is a call out for 3 variable names. Is the "pred" referring to the xBeta that is saved from the Cox regression?

This technical note was last modified in 2011. The introduction states that it is not optimized for efficiency. Is this a comment about computing time or the validity of the output?

Thanks.
Clinton