pbc_orsf {aorsf}

Mayo Clinic Primary Biliary Cholangitis Data

Description

These data are a light modification of the survival::pbc data. The modifications are:

Usage

pbc_orsf

Format

A data frame with 276 rows and 20 variables:

id

case number

time

number of days between registration and the earlier of death, transplantion, or study analysis in July, 1986

status

status at endpoint, 0 for censored or transplant, 1 for dead

trt

randomized treatment group: D-penicillmain or placebo

age

in years

sex

m/f

ascites

presence of ascites

hepato

presence of hepatomegaly or enlarged liver

spiders

blood vessel malformations in the skin

edema

0 no edema, 0.5 untreated or successfully treated, 1 edema despite diuretic therapy

bili

serum bilirubin (mg/dl)

chol

serum cholesterol (mg/dl)

albumin

serum albumin (g/dl)

copper

urine copper (ug/day)

alk.phos

alkaline phosphotase (U/liter)

ast

aspartate aminotransferase, once called SGOT (U/ml)

trig

triglycerides (mg/dl)

platelet

platelet count

protime

standardized blood clotting time

stage

histologic stage of disease (needs biopsy)

Details

1. removed rows with missing data

2. converted status into 0 for censor or transplant, 1 for dead

3. converted stage into an ordered factor.

4. converted trt, ascites, hepato, spiders, and edema into factors.

Source

T Therneau and P Grambsch (2000), Modeling Survival Data: Extending the Cox Model, Springer-Verlag, New York. ISBN: 0-387-98784-3.