blalock: Blalock-Taussig Shunt Data

In SMPracticals: Practicals for Use with Davison (2003) Statistical Models

Description

The Blalock–Taussig shunt is an operative procedure for infants with congenital cyanotic heart disease. The data are the survival times in months for shunts in 81 infants, divided into two age groups.

Usage

data(blalock)

Format

A data frame with 81 observations on the following 3 variables.

group

1 indicates infants aged over 1 month at time of the operation. 2 indicates those aged 30 or fewer days at time of operation.

months

survival time in months

cens

censoring indicator: 1 indicates observed failure time

Source

Oakes, D. (1991) Life-table analysis. In Statistical Theory and Modelling: In Honour of Sir David Cox, FRS, eds D. V. Hinkley, N. Reid and E. J. Snell, pp. 107–128. London: Chapman and Hall/CRC Press.

References

Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 192.

Examples

data(blalock)
library(survival)
plot(survfit(Surv(months,cens)~group,data=blalock),conf.int=TRUE,col=c(2,3))

Example output

Loading required package: ellipse

Attaching package: 'ellipse'

The following object is masked from 'package:graphics':

    pairs


Attaching package: 'survival'

The following objects are masked from 'package:SMPracticals':

    aml, pbc

SMPracticals documentation built on May 2, 2019, 11:12 a.m.