gold_copd_criteria: GOLD Criteria for COPD (ABCD Assessment Tool)

In cliot: Clinical Indices and Outcomes Tools

GOLD Criteria for COPD (ABCD Assessment Tool)

Description

Calculates the GOLD Grade (1-4) based on airflow limitation and the GOLD Group (A, B, C, D) based on symptom burden and exacerbation risk. This combined assessment guides initial pharmacological treatment.

Usage

gold_copd_criteria(fev1_percent_predicted, exacerbations_last_year,
                   hospitalized_for_exacerbation, mmrc_score = NULL,
                   cat_score = NULL)

Arguments

fev1_percent_predicted	Numeric. Post-bronchodilator FEV1 percent predicted. Used for spirometric grading (GOLD 1-4).
exacerbations_last_year	Numeric. Number of moderate exacerbations in the past year (requiring antibiotics and/or oral steroids).
hospitalized_for_exacerbation	Numeric (0 or 1). Has the patient had >= 1 exacerbation leading to hospitalization? (1 = Yes).
mmrc_score	Numeric (0-4) (Optional). Modified Medical Research Council Dyspnea Scale.
cat_score	Numeric (0-40) (Optional). COPD Assessment Test score.

Details

Risk Assessment (Y-Axis): Low Risk: 0 or 1 moderate exacerbation (not leading to admission). High Risk: >= 2 moderate exacerbations OR >= 1 leading to admission.

Symptom Assessment (X-Axis): Low Symptoms: mMRC 0-1 OR CAT < 10. High Symptoms: mMRC >= 2 OR CAT >= 10.

Value

A list containing:

GOLD_Spirometry_Grade	Classification of airflow limitation (GOLD 1-4).
GOLD_Group	ABCD grouping based on symptoms and risk.
Treatment_Recommendation	Initial pharmacological management guidance.

References

Global Initiative for Chronic Obstructive Lung Disease (GOLD). Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Lung Disease. 2020 Report.

Examples

# Example 1: Group B (High Symptom, Low Risk)
# FEV1 60% (GOLD 2), 0 Exacerbations, mMRC 2
gold_copd_criteria(60, 0, 0, mmrc_score = 2)

# Example 2: Group D (High Symptom, High Risk)
# FEV1 35% (GOLD 3), 2 Exacerbations, CAT 18
gold_copd_criteria(35, 2, 0, cat_score = 18)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.