

   VVeetteerraann''s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 ttrriiaall..

   AArrgguummeennttss::

      stime: survival or follow-up time in days.

     status: dead or censored.

      treat: standard or test

        age: patient's age in years

       Karn: Karnofsky score of patient's performance on a
             scale of 0 to 100.

   diag.time: times since diagnosis in months at entry to
             trial.

       cell: one of four cell types.

      prior: prior therapy?

   SSUUMMMMAARRYY::

        Veteran's Administration lung cancer trial. from
        Kalbfliesch & Prentice.  A data frame.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

        The components are:

   SSOOUURRCCEE::

        Kalbfleisch, J.D. and Prentice R.L. (1980) italic{The
        Statistical  Analysis  of  Failure  Time  Data.}

