[COPD Classification GOLD I-IV vs. GOLD A-D in Real Life: Comparing Impact on Application, Advantages and...

Area of Science:

• Pulmonology
• Respiratory Medicine
• Clinical Practice Guidelines

Background:

• Chronic Obstructive Pulmonary Disease (COPD) management relies on classification systems to guide therapy.
• Current treatment decisions are influenced by the GOLD I-IV staging and the newer GOLD A-D classification.
• Shared care models involving general practitioners and pulmonologists are common in COPD management.

Purpose of the Study:

• To evaluate the advantages of the GOLD A-D classification over the GOLD I-IV system for COPD therapy decisions.
• To assess the impact of different COPD Assessment Test (CAT) thresholds on GOLD A-D group distribution.
• To identify treatment gaps, including overtreatment and undertreatment, in COPD patients under both classification systems.

Main Methods:

• Patients with COPD were classified using both GOLD I-IV and GOLD A-D systems.
• The study analyzed the distribution of patients across GOLD A-D groups based on varying CAT score thresholds (10, 15, 20).
• Treatment patterns, including overtreatment and undertreatment, were compared between the two classification systems.

Main Results:

• The GOLD A-D classification demonstrated improved signaling for exacerbations compared to GOLD I-IV.
• A CAT threshold of 10 points resulted in a very small Group C (high risk, low symptoms).
• Significant overtreatment in low-severity cases and undertreatment in high-severity cases persisted regardless of the classification system used.
• Prednisolone and roflumilast use showed a notable correlation with increased exacerbations within the A-D system.
• Poor adherence to the principles of both classification systems was observed.

Conclusions:

• The GOLD A-D classification offers progress in COPD management by improving exacerbation prediction.
• Despite advancements, significant treatment gaps (undertreatment/overtreatment) persist, indicating challenges in applying classification principles.
• Potential disadvantages of the A-D classification include sensitivity to short-term intraindividual symptom changes that may not reflect the overall disease course.