colon {survival} | R Documentation

## Chemotherapy for Stage B/C colon cancer

### Description

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 death

### Usage

    data(colon)

### Format

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

### Source

Danyu Lin

[Package survival version 2.26 Index]