add_id_column

Ensures that a data frame has a unique ID column. If <code>id.name</code> is not
provided, a column named <code>"id"</code> is added. If <code>id.name</code> is provided
but does not exist in the data frame, it is created with unique integer
values.

internal

Implements statistical methods for exploratory subgroup identification
in clinical trials with survival endpoints. Provides tools for identifying
patient subgroups with differential treatment effects using machine learning
approaches including Generalized Random Forests (GRF), LASSO regularization,
and exhaustive combinatorial search algorithms. Features bootstrap bias
correction using infinitesimal jackknife methods to address selection bias
in post-hoc analyses. Designed for clinical researchers conducting exploratory
subgroup analyses in randomized controlled trials, particularly for
multi-regional clinical trials (MRCT) requiring regional consistency
evaluation. Supports both accelerated failure time (AFT) and Cox proportional
hazards models with comprehensive diagnostic and visualization tools.
Methods are described in León et al. (2024) <doi:10.1002/sim.10163>.

Larry Leon

forestsearch

Exploratory Subgroup Identification in Clinical Trials with
Survival Endpoints

add_id_column function

<dl><dt>df.analysis</dt>
<dd>Data frame to which the ID column will be added.</dd>
<dt>id.name</dt>
<dd>Character. Name of the ID column to add (default is
<code>NULL</code>, which uses <code>"id"</code>).</dd></dl>

Arguments

Add ID Column to Data Frame — add_id_column

<dl>

<dt>df.analysis</dt>
<dd>Data frame to which the ID column will be added.</dd>


<dt>id.name</dt>
<dd>Character. Name of the ID column to add (default is
<code>NULL</code>, which uses <code>"id"</code>).</dd>

</dl>

add_id_column: Add ID Column to Data Frame

Description

Usage

Value

Arguments