The lung data frame has 715 rows and 13 columns.
data(lung)A balanced data set with respect to the times at which observations recorded. The data consists of the following variables on each patient:
IDpatient identifier.
FVCforced vital capacity (%) determined at 3-month intervals from the baseline.
time_REtime at visit at 3-month intervals.
interceptcolumn of 1's for model setup.
timetime at visit at 3-month intervals. Same as time_RE.
FVC0forced vital capacity (%) at baseline.
FIB0baseline lung fibrosis.
CYCtreatment allocation. Coded as 1 = oral cyclophosphamide; 0 = placebo.
FVC0.CYCinteraction term between FVC0 and CYC.
FIB0.CYCinteraction term between FIB0 and CYC.
time.CYCinteraction term between time and CYC.
time.CYCinteraction term between time and CYC.
survtime to treatment failure or death.
failure_typetreatment failure/death indicator. Coded as 0 = censored; 1 = death;
2 = treatment failure.
Elashoff, Robert M., Gang Li, and Ning Li. "A joint model for longitudinal measurements and survival data in the presence of multiple failure types." Biometrics 64.3 (2008): 762-771.