Data arise from 31 male patients who have been treated for
superficial bladder cancer, and give the number of recurrent tumours during
a particular time after the removal of the primary tumour, along with the size of the
original tumour.
Usage
data("bladdercancer")
Arguments
Format
A data frame with 31 observations on the following 3 variables.
time
the duration.
tumorsize
a factor with levels <=3cm< code=""> and >3cm.=3cm<>
number
number of recurrent tumours.
Source
G. U. H. Seeber (1998), Poisson Regression. In: Encyclopedia of Biostatistics
(P. Armitage and T. Colton, eds), John Wiley \& Sons, Chichester.
Details
The aim is the estimate the effect of size of tumour on the number
of recurrent tumours.