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STPHCOXRCS: Stata module to check proportional-hazards assumption using restricted cubic splines

Author

Listed:
  • Andrea Discacciati

    (Institute of Environmental Medicine, Karolinska Institutet)

  • Viktor Oskarsson

    (Institute of Environmental Medicine, Karolinska Institutet)

  • Nicola Orsini

    (Institute of Environmental Medicine, Karolinska Institutet)

Programming Language

Stata

Abstract

stphcoxrcs checks the proportional-hazards assumption for one covariate of interest (binary or continuous) after fitting a model with stcox. In particular, stphcoxrcs models the natural logarithm of analysis time using restricted cubic splines transformations, which are interacted with the covariate specified in varname. A joint Wald (default) or likelihood ratio test of all the interaction terms is carried out to test the proportional-hazards assumption. Lastly, stphcoxrcs produces a graph of the time-varying Hazard Ratio.

Suggested Citation

  • Andrea Discacciati & Viktor Oskarsson & Nicola Orsini, 2015. "STPHCOXRCS: Stata module to check proportional-hazards assumption using restricted cubic splines," Statistical Software Components S458073, Boston College Department of Economics.
    • Handle: RePEc:boc:bocode:s458073
    Note: This module should be installed from within Stata by typing "ssc install stphcoxrcs". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/s/stphcoxrcs.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/s/stphcoxrcs.sthlp
    File Function: help file
    Download Restriction: no
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