CindexCR {SurvMetrics}

Concordance index in the Presence of Competing Risks

Description

The C-index (Concordance index) of the prognostic model in the presence of competing risks according to Marcel, W et al.(2014).

Usage

CindexCR(time, status, predicted, Cause_int = 1)

Arguments

time

minimum value of deletion time and survival time.

status

the status indicator, for models with competing risks, the status indicator is 0=censored, 1=event at time, 2= competing risks at time.

predicted

a vector of predicted values or the survival time of survival probabilities of each observation.

Cause_int

event type of interest, the default value is 1.

Value

Estimates of the C-index in the presence of competing risks.

Author(s)

HanPu Zhou [e-mail]

References

Marcel, W. , Paul, B. , Koller, M. T. , Witteman, J. , & Gerds, T. A. . (2014).Concordance for prognostic models with competing risks. Biostatistics(3), 526.

Ishwaran, H. , Kogalur, U. B. , Blackstone, E. H. , & Lauer, M. S. . (2008). Random survival forests. Journal of Thoracic Oncology Official Publication of the International Association for the Study of Lung Cancer, 2(12), 841-860.

Examples

time <- c(4, 7, 5, 8)
status <- rep(1, 4)
predicted <- c(3, 5, 7, 10)
Cause_int <- 1
CindexCR(time, status, predicted, Cause_int)