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*                                                                       *
* larynx-do.txt                                                         *
*                                                                       *
* PURPOSE:  analysis of survival data                                   *
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* DATE: 01/05/10                                                        *
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infile stage time age year status using larynx-dat.txt

label variable stage "stage at diagnosis"
label variable time "time (years)"
label variable age "age"
label variable year "year of entry"
label variable status "status"

gen stage34 = stage
recode stage34 1/2=0 3/4=1

stset time, failure(status)