myeloid | R Documentation |
This simulated data set is based on a trial in acute myeloid leukemia.
myeloid
data(cancer, package="survival")
A data frame with 646 observations on the following 9 variables.
id
subject identifier, 1-646
trt
treatment arm A or B
sex
f=female, m=male
flt3
mutations of the FLT3 gene, a factor with levels of A, B, C
futime
time to death or last follow-up
death
1 if futime
is a death, 0 for censoring
txtime
time to hematropetic stem cell transplant
crtime
time to complete response
rltime
time to relapse of disease
This data set is used to illustrate multi-state survival curves. It is based on the actual study in the reference below. A subset of subjects was de-identifed, reordered, and then all of the time values randomly perturbed.
Mutations in the FLT3 domain occur in about 1/3 of AML patients, the additional agent in treatment arm B was presumed to target this anomaly. All subjects had a FLT mutation, either internal tandem duplications (ITD) (divided into low vs high) +- mutations in the TKD domain, or TKD mutations only. This was a stratification factor for treatment assignment in the study. The levels of A, B, C correspond to increasing severity of the mutation burden.
Le-Rademacher JG, Peterson RA, Therneau TM, Sanford BL, Stone RM, Mandrekar SJ. Application of multi-state models in cancer clinical trials. Clin Trials. 2018 Oct; 15 (5):489-498
coxph(Surv(futime, death) ~ trt + flt3, data=myeloid)
# See the mstate vignette for a more complete analysis
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