cosmesis: Breast cosmesis data

Description Usage Format Source References See Also Examples

Description

Interval-censored times to cosmetic deterioration for breast cancer patients undergoing radiation or radiation plus chemotherapy.

Usage

1

Format

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.

Source

Finkelstein, D. M. and Wolfe, R. A. (1985) A semiparametric model for regression analysis of interval-censored failure time data. Biometrics 41, 933–945.

References

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.

See Also

coxaalen

Examples

1

aboruvka/coxinterval documentation built on May 10, 2019, 4:14 a.m.