| pbc {randomForestSRC} | R Documentation |
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.
A data frame containing:
| 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 |
Flemming and Harrington, 1991, Appendix D.1.
Flemming T.R and Harrington D.P., (1991) Counting Processes and Survival Analysis. New York: Wiley.
data(pbc, package = "randomForestSRC") pbc.obj <- rfsrc(Surv(days, status) ~ ., pbc, nsplit = 3)