DropoutMechanism.object: DropoutMechanism object

In dejaVu: Multiple Imputation for Recurrent Events

Description

An object which defines a specific mechanism which takes a complete SingleSim object and returns a set of drop out times for subjects

Arguments

type	The type of mechanism (e.g. "MCAR" or "MNAR")
text	A short string describing the mechanism (only used for printing)
cols.needed	Which columns in the SingleSim$data data frame must be included for this drop out mechanism to work. This option could allow drop out mechanism which depend on covariates to be included.
GetDropTime	A function with two arguments event.times and data, the corresponding entries from the SingleSim object. This function should return a list of dropout times (if a subject does not dropout its dropout time should be their current censored.time (i.e. the study follow up time))
parameters	A list of named parameters for the mechanism (only used for printing) or NULL if none

Details

It is possible to create user defined mechanisms, however, certain common mechanisms have already been implemented. For example see ConstantRateDrop and LinearRateChangeDrop

Only the GetDropTime and cols.needed entries are required for calculation, the other entries are used for printing the object

print.DropoutMechanism methods is defined.

Structure

The following components must be included in a DropoutMechanism Object

dejaVu documentation built on April 27, 2021, 5:07 p.m.