| kidney {survival} | R Documentation |
Data on the recurrence times to infection, at the point of insertion of the catheter, for kidney patients using portable dialysis equipment. Catheters may be removed for reasons other than infection, in which case the observation is censored. Each patient has exactly 2 observations.
| patient: | id |
| time: | time |
| status: | event status |
| age: | in years |
| sex: | 1=male, 2=female |
| disease: | disease type (0=GN, 1=AN, 2=PKD, 3=Other) |
| frail: | frailty estimate from original paper |
The original analysis had incorrect handling of ties and so is not exactly reproduced by survival.
McGilchrist and Aisbett, Biometrics 47, 461-66, 1991
data(kidney)
kfit <- coxph(Surv(time, status)~ age + sex + disease + frailty(id), kidney)
kfit0 <- coxph(Surv(time, status)~ age + sex + disease, kidney)
kfitm1 <- coxph(Surv(time,status) ~ age + sex + disease +
frailty(id, dist='gauss'), kidney)