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

Andrea Discacciati, Viktor Oskarsson and Nicola Orsini
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Viktor Oskarsson: Institute of Environmental Medicine, Karolinska Institutet

Statistical Software Components from Boston College Department of Economics

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.

Language: Stata
Requires: Stata version 12
Keywords: proportional hazards; restricted cubic splines; stcox (search for similar items in EconPapers)
Date: 2015-09-04
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.
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http://fmwww.bc.edu/repec/bocode/s/stphcoxrcs.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/s/stphcoxrcs.sthlp help file (text/plain)

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