kidney {survival} | R Documentation

## Kidney data from survival5

### Description

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.

### Format

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

### Note

The original analysis had incorrect handling of ties and so is not exactly reproduced by survival.

### Source

McGilchrist and Aisbett, Biometrics 47, 461-66, 1991

### Examples

    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)

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