hyper: Treatment of hypernephroma data
In straweib: Stratified Weibull Regression Model

Description Usage Format Details References Examples

This dataset contains survival times for 36 patients with malignant tumour in the kidney. Some of the patients received nephrectomy. See Example 3.4 and example 5.9 of the Collett (2003) for more details. The event time in this example is right censored.

hyper

A data frame with 36 observations on the following 4 variables:

nephrectomy: indicator on whether or not the patient had recived a nephrectomy
age: age group at the time of diagnosis. 1 = <60, 2 = 60-70, 3 = >70.
time: observed time.
status: status of the observed time. 0 = censored, 1 = event.

The data uses time and status to represent the observed survival time. To fit into the icweib function, left and right endpoints of censoring interval need to be derived (see examples).

Collett, D. (2003). Modelling Survival Data in Medical Research, Second Edition, Texts in statistical science. Taylor & Francis.

1 2 3 4	data(hyper) ## Derive left and right endpoints from time and status hyper$left <- hyper$time hyper$right <- ifelse(hyper$status==1, hyper$time, Inf)