prentice {SMIR} | R Documentation |
The file consists of survival times in days of 137 lung cancer patients from a Veteran's Administration Lung Cancer trial, together with explanatory variables: performance status, a measure of general medical status on a continuous scale 1–9.9, with 1–3 completely hospitalized, 4–6 partial confinement to hospital, 7–9.9 able to care for self; age in years; time in months from diagnosis to starting on the study; a factor prior therapy (1 no, 2 yes); a factor treatment (1 standard, 2 test) and a factor tumour type (1 squamous, 2 small, 3 adeno, 4 large). There are three censored observations.
data(prentice)
A data.frame of 137 obs. of 8 variables:
[,1] | treat | integer, 1= standard, 2= test |
[,2] | type | integer, 1= squamous, 2 =small, 3= adeno, 4= large |
[,3] | time | integer, survival time in days |
[,4] | censor | integer, censoring indicator |
[,5] | status | integer, general medical status on a scale 1–9.9 |
[,6] | mfd | integer, time in months from diagnosis |
[,7] | age | integer, age in years |
[,8] | prior | integer, prior therapy 1=no, 2=yes |
See p.414 in SMIR
Prentice, R. L. (1973), "Exponential survivals with censoring and explanatory variables", Biometrika, 60, 279–88.