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bootstrapped cox regression (rms package)

Thanks Eric.  It would be good to show your entire script next time as stated
in the posting guidance.

Regarding matching with SPSS please describe the bootstrapping algorithm
used there.  In rms I do the unconditional bootstrap, i.e., I sample with
replacement from the rows of the raw data.  And also make sure that SPSS ran
a large number of bootstrap replications.

Frank


Eric Claus wrote
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Frank Harrell
Department of Biostatistics, Vanderbilt University
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