This database corresponds to the time of recurrence of tumors in 78 patients with bladder cancer. Patients were randomly assigned to treatments: placebo (47 patients) and pyridoxine (31 patients). Data type data.frame with 222 observations on 8 variables.
data(TBCplapyr)
A data frame with 222 observations on the following 9 variables.
j
Observation number
id
ID of each unit. Repeated for each recurrence
Tinicio
Inicial time
time
recurrence o censoring time. For each unit the last time is censored
Tcal
Time if observation for each unit
event
censoring status. 1 = occurrence of the event in the unit and 0 right censored time
strata
Number of strata
trt
a factor with levels \(Placebo\) or \(Pyridoxine\)
group
A factor with levels. Group identification
Experiment Byar(1980). The database Byar experiment is used and the time (months) of recurrence of tumors in 116 sick patients with superficial bladder cancer is measured. These patients were randomly allocated to the following treatments: placebo (47 patients), pyridoxine (31 patients) and thiotepa (38 patients).
Martinez C., Ramirez, G., Vasquez M. (2009).Pruebas no parametricas para comparar curvas de supervivencia de dos grupos que experimentan eventos recurrentes. Propuestas. Revista Ingenieria U.C.,Vol 16, 3, 45-55.// Martinez, C. (2009). Generalizacion de algunas pruebas clasicas de comparacion de curvas de supervivencia al caso de eventos de naturaleza recurrente. Tesis doctoral. Universidad Central de Venezuela (UCV). Caracas-Venezuela.// Pena E., Strawderman R., Hollander M. (2001). Nonparametric Estimation with Recurrent Event Data. J.A.S.A. 96, 1299-1315.
# NOT RUN {
XL<-data(TBCplapyr)
XL<-data(TBCplapyr)
print(XL)
Print.Summary(TBCplapyr)
# }
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