

   RReemmiissssiioonn TTiimmeess ffoorr AAccuuttee MMyyeellooggeennoouuss LLeeuukkaaeemmiiaa

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

       time: The length of the complete remission (in weeks).

       cens: An indicator of right censoring.  1 indicates that
             the patient had a relapse and so `time' is the
             length of the remission. 0 indicates that the
             patient had left the study or was still in remis-
             sion in October 1974, that is the length of remis-
             sion is right-censored.

      group: The group into which the patient was randomized.
             Group 1 received maintenance chemotherapy, group 2
             did not.

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

        The `aml' data frame has 23 rows and 3 columns.

        A clinical trial to evaluate the efficacy of mainte-
        nance chemotherapy for acute myelogenous leukaemia was
        conducted by Embury et al. (1977) at Stanford Univer-
        sity.  After reaching a stage of remission through
        treatment by chemotherapy, patients were randomized
        into two groups. The first group received maintenance
        chemotherapy and the second group did not.  The aim of
        the study was to see if maintenance chemotherapy
        increased the length of the remission.  The data here
        formed a preliminary analysis which was conducted in
        October 1974.

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

        This data frame contains the following columns:

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

        The data were obtained from

        Miller, R.G. (1981) Survival Analysis. John Wiley.

   OOTTHHEERR RREEFFEERREENNCCEESS::

        Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
        ods and Their Application. Cambridge University Press.

        Embury, S.H, Elias, L., Heller, P.H., Hood, C.E.,
        Greenberg, P.L. and Schrier, S.L. (1977) Remission
        maintenance therapy in  acute myelogenous leukaemia.
        Western Journal of Medicine, 126, 267-272.

