survival: nwtco – R documentation

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nwtco

Data from the National Wilm's Tumor Study

Description

Measurement error example. Tumor histology predicts survival, but prediction is stronger with central lab histology than with the local institution determination.

Usage

nwtco
data(nwtco, package="survival")

Format

A data frame with 4028 observations on the following 9 variables.

seqno: id number
instit: Histology from local institution
histol: Histology from central lab
stage: Disease stage
study: study
rel: indicator for relapse
edrel: time to relapse
age: age in months
in.subcohort: Included in the subcohort for the example in the paper

References

NE Breslow and N Chatterjee (1999), Design and analysis of two-phase studies with binary outcome applied to Wilms tumour prognosis. Applied Statistics 48, 457–68.

Examples

with(nwtco, table(instit,histol))
anova(coxph(Surv(edrel,rel)~histol+instit,data=nwtco))
anova(coxph(Surv(edrel,rel)~instit+histol,data=nwtco))

survival

Survival Analysis

v3.2-11

LGPL (>= 2)

Authors

Terry M Therneau [aut, cre], Thomas Lumley [ctb, trl] (original S->R port and R maintainer until 2009), Atkinson Elizabeth [ctb], Crowson Cynthia [ctb]

Initial release

2021-04-25