R: Check the fit of Markov flexible parametric multi-state...

ajfit_fmsm {flexsurv} | R Documentation

## Check the fit of Markov flexible parametric multi-state models against nonparametric estimates.

### Description

Computes both parametric and comparable Aalen-Johansen nonparametric estimates from a flexible paramrtric multi-state model, and returns them together in a tidy data frame. Only models w ith no covariates, or only factor covariates, are supported. If there are factor covariates, then the nonparametric estimates are computed for subgroups defined by combinations of the covariates.

### Usage

    ajfit_fmsm(x, maxt = NULL, newdata = NULL)

### Arguments

`x` | Object returned by `fmsm` representing a flexible parametric multi-state model. This must be Markov, rather than semi-Markov, and no check is performed for this. Note that all "competing risks" style models, with just one source state and multiple destination states, are Markov, so those are fine here.
`maxt` | Maximum time to compute parametric estimates to.
`newdata` | Data frame defining the subgroups to consider. This must have a column for each covariate in the model. If omitted, then all potential subgroups defined by combinations of factor covariates are included. Continuous covariates are not supported.

### Value

Tidy data frame containing both Aalen-Johansen and parametric estimates of state occupancy over time, and by subgroup if subgroups are included.

[Package flexsurv version 2.0 Index]