(data(colon))
These are data from one of the first successful trials of
adjuvant chemotherapy for colon cancer. Levamisole is a low-toxicity
compound previously used to treat worm infestations in animals; 5-FU
is a moderately toxic (as these things go) chemotherapy agent. There
are two records per person, one for recurrence and one for deathll{
id: id
study: 1 for all patients
rx: Treatment - Obs(ervation), Lev(amisole), Lev(amisole)+5-FU
sex: 1=male
age: in years
obstruct: obstruction of colon by tumour
perfor: perforation of colon
adhere: adherence to nearby organs
nodes: number of lymph nodes with detectable cancer
status: censoring status
differ: differentiation of tumour (1=well, 2=moderate, 3=poor)
extent: Extent of local spread (1=submucosa, 2=muscle, 3=serosa,
4=contiguous structures)
surg: time from surgery to registration (0=short, 1=long)
node4: more than 4 positive lymph nodes
time: days until death
etype: 1=recurrence,2=death
}