Description Usage Format Source References See Also Examples
Interval-censored times to cosmetic deterioration for breast cancer patients undergoing radiation or radiation plus chemotherapy.
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A data frame with 94 observations on the following 3 variables.
left
left endpoint of the censoring interval in months
right
right endpoint of the censoring interval in months
treat
a factor with levels RT
and RCT
representing
radiotherapy-only and radiation plus chemotherapy treatments,
respectively
From Huang and Weller (1995) the maximum likelihood estimate of the
Cox model regression coefficient for this data set is 0.797. Its
standard error based on the curvature of the profile-likelihood is
0.29. Similar results are obtained with coxaalen
.
Finkelstein, D. M. and Wolfe, R. A. (1985) A semiparametric model for regression analysis of interval-censored failure time data. Biometrics 41, 933–945.
Finkelstein, D. M. (1986) A proportional hazards model for interval-censored failure time data. Biometrics 42, 845–854.
Huang, J. and Wellner, J. A. (1995) Efficient estimation for the proportional hazards model with 'case 2' interval censoring. Technical report 290. Department of Statistics, University of Washington.
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