mets (version 1.3.11)

iidBaseline: Influence Functions or IID Decomposition of Baseline

Description

Computes the influence functions for the baseline cumulative hazard (and optionally regression coefficients) for phreg, recreg, or cifregFG objects.

Usage

iidBaseline(
  object,
  time = NULL,
  ft = NULL,
  fixbeta = NULL,
  beta.iid = NULL,
  tminus = FALSE,
  ...
)

Value

An object of class "iidBaseline" containing:

time

Time point.

base.iid

Influence functions for the baseline.

beta.iid

Influence functions for the regression coefficients.

cumhaz.time

Cumulative hazard at the specified time.

strata

Strata indices.

Arguments

object

Object of class "phreg", "recreg", or "cifregFG".

time

Time point for baseline IID (required).

ft

Function to compute IID of baseline integrated against \(f(t)\).

fixbeta

Logical; if TRUE, fixes the coefficients (useful for specific tests).

beta.iid

Optional matrix of beta influence functions to use.

tminus

Logical; if TRUE, computes predictions at \(t-\) (strictly before \(t\)), useful for IPCW techniques.

...

Additional arguments passed to lower-level functions.

Author

Thomas Scheike

Details

The decomposition is based on the formula: $$ \sum_i \int_0^t \frac{f(s)}{S_0(s)} dM_{ki}(s) - P(t) \beta_k $$ where \(k\) denotes the stratum and \(i\) the cluster.

See Also

phreg, recreg, cifreg