ap {npsurv}

Angina Pectoris Survival Data

Description

Contains the survival times in years from the time of diagnosis for 2418 male patients with angina pectoris. Some patients are lost to follow-up, hence giving right-censored observations. Each integer-valued survival time is treated as being censored within a one-year interval.

Format

A data frame with 30 observations and 3 variables:

L: left-end point of an interval-censored retraction time;

R: right-end point of an interval-censored retraction time;

count: number of patients in the interval.

Source

Lee and Wang (2003), page 92.

References

Lee, E. T. and Wang, J. W. (2003). Statistical Methods for Survival Data Analysis. Wiley.

See Also

npsurv.

Examples

data(ap)
r = Uhaz(ap, deg=2)           # smooth U-shaped hazard
plot(r$h, fn="h")             # hazard
plot(r$h, fn="d")             # density

# NPMLE and shape-restricted estimation
plot(npsurv(ap), fn="s")      # survival under no shape restriction
plot(r$h, fn="s", add=TRUE)   # survival with smooth U-shaped hazard