msm (version 0.2.1)

sojourn.msm: Mean sojourn times from a multi-state model

Description

Estimate the mean sojourn times in the transient states of a multi-state model and their standard errors.

Usage

sojourn.msm(x, covariates="mean")

Arguments

x

A fitted multi-state model, as returned by msm

covariates

The covariate values at which to estimate the mean sojourn times. This can either be: the string "mean", denoting the means of the covariates in the data (this is the default), the number 0, indicating that all the covariates

Value

• A list with components:
• estimate
  Estimated mean sojourn times in the transient states.
• se
  Corresponding standard errors.

Details

The mean sojourn time in a transient state $r$ is estimated by $- 1 / q_{rr}$, where $q_{rr}$ is the $r$th entry on the diagonal of the estimated transition intensity matrix. Calls deltamethod to find approximate standard errors.

See Also

msm, qmatrix.msm, deltamethod