

   VVeetteerraannss'' AAddmmiinniissttrraattiioonn LLuunngg CCaanncceerr ssttuuddyy

        data(pbc)

   FFoorrmmaatt::

        trt:          1=standard 2=test
         celltype:    1=squamous,  2=smallcell,  3=adeno,  4=large
         time:        survival time
         status:      censoring status
         karno:       Karnofsky performance score (100=good)
         diagtime:    months from diagnosis to randomisation
         age:         in years
         prior:       prior therapy 0=no, 10=yes

   SSoouurrccee::

        Kalbfleisch and Prentice "The Statistical Analysis of
        Failure Time Data"

