GOLD 4 COPD corresponds to which FEV1 range?

GOLD 4 COPD corresponds to which FEV1 range?

• A. FEV1 <30% predicted, extreme limitation.
• B. FEV1 ≥80% predicted, mild airflow limitation.
• C. FEV1 50-79% predicted, moderate limitation.
• D. FEV1 30-49% predicted, severe limitation.

Answer: (A)

GOLD stages classify airflow limitation by FEV1 percent predicted. The thresholds are: mild ≥80%, moderate 50–79%, severe 30–49%, and very severe <30% (GOLD 4). So GOLD 4 corresponds to FEV1 below 30% predicted, indicating extreme airflow obstruction and a higher risk of symptoms and complications. The other ranges map to milder stages: 50–79% is moderate, 30–49% is severe, and ≥80% is mild, which is why they don’t define GOLD 4.

GOLD stages classify airflow limitation by FEV1 percent predicted. The thresholds are: mild ≥80%, moderate 50–79%, severe 30–49%, and very severe <30% (GOLD 4). So GOLD 4 corresponds to FEV1 below 30% predicted, indicating extreme airflow obstruction and a higher risk of symptoms and complications. The other ranges map to milder stages: 50–79% is moderate, 30–49% is severe, and ≥80% is mild, which is why they don’t define GOLD 4.