This data consist of times until the first and second recurrences of kidney infection in 38 patients using a portable dialysis machine (McGilchrist and Aisbett, 1991; Therneau and Lumley, 2015). Each survival time is the time until infection since the insertion of the catheter.
data("kidney")
A data frame with 76 observations on the following 7 variables.
id
patients identifier for 38 patients
time
time until infection since the insertion of the catheter
status
event stuatus (=1; infection, =0; censoring)
age
age of patients in years
sex
1=male, 2=female
disease
a factor for disease type with levels Other
, GN
, AN
and PKD
frail
frailty estimate from original paper
McGilchrist, C.A. and Aisbett, C.W. (1991). Regression with frailty in survival analysis. Biometrics, 47, 461--466.
Therneau, T. and Lumley, T. (2015). survival: Survival Analysis. R package version 2.38-3.