PBC {JointAI}

PBC data

Description

Data from the Mayo Clinic trial in primary biliary cirrhosis (PBC) of the liver. This dataset was obtained from the survival package: the variables copper and trig from survival::pbc were merged into survival::pbcseq and several categorical variables were re-coded.

Format

PBC: A data frame of 312 individuals in long format with 1945 rows and 21 variables.

Survival outcome and id

id

case number

futime

number of days between registration and the earlier of death, transplantation, or end of follow-up

status

status at endpoint ("censored", "transplant" or "dead")

Baseline covariates

trt

D-pen (D-penicillamine) vs placebo

age

in years

sex

male or female

copper

urine copper (\mug/day)

trig

triglycerides (mg/dl)

Time-varying covariates

day

number of days between enrolment and this visit date; all measurements below refer to this date

albumin

serum albumin (mg/dl)

alk.phos

alkaline phosphatase (U/liter)

ascites

presence of ascites

ast

aspartate aminotransferase (U/ml)

bili

serum bilirubin (mg/dl)

chol

serum cholesterol (mg/dl)

edema

"no": no oedema, "(un)treated": untreated or successfully treated 1 oedema, "edema": oedema despite diuretic therapy

hepato

presence of hepatomegaly (enlarged liver)

platelet

platelet count

protime

standardised blood clotting time

spiders

blood vessel malformations in the skin

stage

histologic stage of disease (4 levels)

Examples

 summary(PBC)