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Survival times of 3882 subjects with multiple myeloma, seen at Mayo Clinic from 1947--1996.
myeloma data("cancer", package="survival")
A data frame with 3882 observations on the following 5 variables.
id
subject identifier
year
year of entry into the study
entry
time from diagnosis of MM until entry (days)
futime
follow up time (days)
death
status at last follow-up: 0 = alive, 1 = death
Subjects who were diagnosed at Mayo will have entry =0, those who were diagnosed elsewhere and later referred will have positive values.
R. Kyle, Long term survival in multiple myeloma. New Eng J Medicine, 1997
# Incorrect survival curve, which ignores left truncation fit1 <- survfit(Surv(futime, death) ~ 1, myeloma) # Correct curve fit2 <- survfit(Surv(entry, futime, death) ~1, myeloma)
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