Breast Cosmesis Data

Interval-censored breast cosmesis data from Finkelstein and Wolfe (1985), discussed by Moore (2016, example 12.2) and available in the interval package. Compared to that version, bcos2 recodes the lower bound of left-censored data (NA instead of 0) and the upper bound of right-censored data (NA instead of Inf) to ease identification via Surv(type = "interval2").

Format

A data frame with 94 observations on 3 variables:

left

Numeric lower bound.

right

Numeric upper bound.

treatment

Factor with levels Rad and RadChem.

Source

Finkelstein, D.M., and Wolfe, R.A. (1985). A semiparametric model for regression analysis of interval-censored failure time data. Biometrics 41: 731-740.

Moore, D.K. (2016). Applied Survival Analysis Using R. Springer.

Examples

data(bcos2)