| blalock {SMPracticals} | R Documentation |
Blalock–Taussig Shunt Data
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))