melanoma                package:boot                R Documentation

Survival from Malignant Melanoma

Description:

     The 'melanoma' data frame has 205 rows and 7 columns.

     The data consist of measurements made on patients with malignant
     melanoma. Each patient had their tumour removed by surgery at the
     Department of Plastic Surgery, University Hospital of Odense,
     Denmark during the period 1962 to 1977. The surgery consisted of
     complete removal of the tumour together with about 2.5cm of the
     surrounding skin.  Among the measurements taken were the thickness
     of the tumour and whether it was ulcerated or not.  These are
     thought to be important prognostic variables in that patients with
     a thick and/or ulcerated tumour have an increased chance of death
     from melanoma. Patients were followed until the end of 1977.

Usage:

     melanoma

Format:

     This data frame contains the following columns:


     'time' Survival time in days since the operation, possibly
          censored.

     'status' The patients status at the end of the study. 1 indicates
          that they had died from melanoma, 2 indicates that they were
          still alive and 3 indicates that they had died from causes
          unrelated to their melanoma.

     'sex' The patients sex; 1=male, 0=female.

     'age' Age in years at the time of the operation.

     'year' Year of operation.

     'thickness' Tumour thickness in mm.

     'ulcer' Indicator of ulceration; 1=present, 0=absent.

Note:

     This dataset is not related to the dataset in the 'lattice'
     package with the same name.

Source:

     The data were obtained from

     Andersen, P.K., Borgan, O., Gill, R.D. and Keiding, N. (1993)
     _Statistical Models Based on Counting Processes_. Springer-Verlag.

References:

     Davison, A.C. and Hinkley, D.V. (1997) _Bootstrap Methods and
     Their Application_. Cambridge University Press.

     Venables, W.N. and Ripley, B.D. (1994)  _Modern Applied Statistics
     with S-Plus_. Springer-Verlag.

