pbc {survival} | R Documentation

## Mayo Clinic Primary Biliary Cirrhosis Data

### Description

Followup of 312 randomised and 108 unrandomised patients with primary biliary cirrhosis, a rare autoimmune liver disease, at Mayo Clinic. Most variables have some missing data, coded as -9.

### Usage

    data(pbc)

### Format

age: | in years
alb: | serum albumin
alkphos: | alkaline phosphotase
ascites: | presence of ascites
bili: | serum bilirunbin
chol: | serum cholesterol
edema: | presence of edema
edtrt: | 0 no edema, 0.5 untreated or successfully treated
| 1 unsuccessfully treated edema
hepmeg: | enlarged liver
time: | survival time
platelet: | platelet count
protime: | standardised blood clotting time
sex: | 1=male
sgot: | liver enzyme (now called AST)
spiders: | blood vessel malformations in the skin
stage: | histologic stage of disease (needs biopsy)
status: | censoring status
trt: | 1/2/-9 for control, treatment, not randomised
trig: | triglycerides
copper: | urine copper

### Source

Fleming TR, Harrington DP. "Counting Processes and Survival Analysis" Wiley:New York

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