nwtsco: Dataset from the National Wilms Tumor Study (NWTS)

Description Usage Format Source

Description

Dataset from the National Wilms Tumor Study (NWTS)

Usage

1

Format

A data frame with 3915 rows and 12 variables:

trel

Time to relapse orlast date seen (yr), continuous

tsur

Time to death or last date seen (yr), continuous

relaps

Indicator of relapse, 0 = Alive no prior relapse when last seen, 1 = Relapsed after trel years

dead

Indicator of death, 0 = Alive when last seen, 1 = Died after tsur years

study

NWTS study, 3 = NWTS-3, 4 = NWTS-4

stage

Stage of disease, 1=I, 2=II, 3=III, 4=IV

histol

Central Path histology, 0 = Favorable (FH), 1 = Unfavorable (UH)

instit

Institutional histology, 0 = Favorable (FH), 1 = Unfavorable (UH)

age

Age at diagnosis (yr), continuous

yr

Year of diagnosis, calendar year

specwgt

Weight of tumor bearing specimen, in grams (continuous)

tumdiam

Diameter of tumor, in centimeters (continuous)

Source

Originally used by M. Kulich and D.Y. Lin: Improving the efficiency of relative-risk estimation in case-cohort studies. J Amer Statis Assoc 99:832-844, 2004.


addhazard documentation built on May 2, 2019, 9:40 a.m.