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From |
Megan Lawson <Megan.Lawson@Colorado.EDU> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: stcurve and competing hazards model |

Date |
Sat, 22 Aug 2009 08:53:56 -0600 (MDT) |

I am estimating a competing hazards model by including a dummy variable for "protected" status and then interacting my this protected indicator with each covariate in the model (a la Lunn and McNeil Method A). A linear summary of my model would look something like this: y = I(protected=1)+B1x+B2(x*I(protected=1). I would like to use -stcurve- to graph these two categories, but the graph (and resulting baseline hazard estimates) seem not quite right when I enter the following: stcurve, hazard at1(protected=1) at2(protected=0) After much puzzling I believe that the the problem is that stcurve is not also estimating separate values for the interaction terms, instead setting them to the mean values overall. So I tried the following, where 1 category has a 1 for protected and positive values for the interaction terms, and the other has a zero for both the indicator and the interaction terms: stcurve, hazard at1(protected=1 pctrawcount_prot>0) at2(protected=0 pctrawcount_prot=0) Unfortunately Stata doesn't allow anything but "=" in the -at- statements. Does anybody have a suggestion for how to work around this? Many thanks, Megan Lawson Doctoral Candidate Department of Economics University of Colorado - Boulder * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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