estC {compareC} | R Documentation |
This is a function used to estimate a single overall C index
estC(timeX, statusX, scoreY)
timeX |
The vector of actual survival time X, one survival time for each observation |
statusX |
The matching vector of event indicator for time X, 1 if occured and 0 otherwise |
scoreY |
The vector of the measured biomarker Y, one for each of the same observations, based on which the C index is to be estimated |
The estimated C index
Le Kang, Weijie Chen
Harrell FE, Califf RM, Pryor DB, Lee KL, and Rosati RA. (1982) Evaluating the yield of medical tests. The Journal of the American Medical Association, 247(18), 2543–2546
Pencina MJ and D'Agostino RB. (2004) Overall C as a measure of discrimination in survival analysis: model specific population value and confidence interval estimation. Statistics in Medicine, 23(13), 2109–2123
Kang L, Chen W, Petrick NA, and Gallas BD. (2014) Comparing two correlated C indices with right-censored survival outcome: a one-shot nonparametric approach. Statistics in Medicine, 34(4), 685–703, doi: 10.1002/sim.6370
demo(testC)