early_stop_decision

Evaluates whether enough evidence exists to stop early based on
confidence interval for consistency proportion.

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

early_stop_decision function

<dl><dt>n_success</dt>
<dd>Integer. Number of splits meeting consistency.</dd>
<dt>n_total</dt>
<dd>Integer. Total number of valid splits.</dd>
<dt>threshold</dt>
<dd>Numeric. Target consistency threshold.</dd>
<dt>conf.level</dt>
<dd>Numeric. Confidence level for decision (default 0.95).</dd>
<dt>min_samples</dt>
<dd>Integer. Minimum samples before allowing early stop.</dd></dl>

Arguments

Early Stopping Decision — early_stop_decision

<dl>

<dt>n_success</dt>
<dd>Integer. Number of splits meeting consistency.</dd>


<dt>n_total</dt>
<dd>Integer. Total number of valid splits.</dd>


<dt>threshold</dt>
<dd>Numeric. Target consistency threshold.</dd>


<dt>conf.level</dt>
<dd>Numeric. Confidence level for decision (default 0.95).</dd>


<dt>min_samples</dt>
<dd>Integer. Minimum samples before allowing early stop.</dd>

</dl>

early_stop_decision: Early Stopping Decision

Description

Usage

Value

Arguments