randomForestSRC (version 1.6.1)

pbc: Primary Biliary Cirrhosis (PBC) Data

Description

Data from the Mayo Clinic trial in primary biliary cirrhosis (PBC) of the liver conducted between 1974 and 1984. A total of 424 PBC patients, referred to Mayo Clinic during that ten-year interval, met eligibility criteria for the randomized placebo controlled trial of the drug D-penicillamine. The first 312 cases in the data set participated in the randomized trial and contain largely complete data.

format

A data frame containing: ll{ days survival time in days status censoring indicator drugs 1=D-penicillamine, 2=placebo age age in days sex 0=female, 1=male asictes presence of asictes, 0=no 1=yes hepatom presence of hepatomegaly, 0=no 1=yes spiders presence of spiders, 0=no 1=yes edema presence of edema (0, 0.5, 1) bili serum bilirubin in mg/dl chol serum cholesterol in mg/dl albumin albumin in gm/dl copper urine copper in ug/day alk alkaline phosphatase in U/liter sgot SGOT in U/ml trig triglicerides in mg/dl platelet platelets per cubic ml/1000 prothrombin prothrombin time in seconds stage histologic stage of disease }

source

Flemming and Harrington, 1991, Appendix D.1.

References

Flemming T.R and Harrington D.P., (1991) Counting Processes and Survival Analysis. New York: Wiley.

Examples

data(pbc, package = "randomForestSRC")
pbc.obj <- rfsrc(Surv(days, status) ~ ., pbc, nsplit = 3)