Extend Cumulative Hazard Functions to Common Time Range

Extends a collection of cumulative hazard functions so that they all cover the same time range. Cumulative hazards that end before the maximum observed time are extrapolated linearly using either a user-supplied rate or the average hazard rate estimated from the existing cumulative hazard.

Usage

extendCums(cumA, cumB, extend = NULL)

Arguments

cumA

a cumulative hazard matrix (two columns: time, cumulative hazard) or a list of such matrices.

cumB

an optional second cumulative hazard matrix. If provided it is combined with cumA into a list.

extend

numeric vector of hazard rates used for extrapolation, one per cumulative hazard. If NULL (default), rates are estimated as the ratio of the last cumulative hazard value to the last time point.

Value

A list of cumulative hazard matrices extended to the common maximum time.

See also

rchaz, rcrisk, mets-simulation