COPD airflow obstruction grade by post-bronchodilator spirometry (GOLD 2026)
gold2026_copd_airflow@1.0In patients with COPD (FEV1/FVC < 0.7): GOLD 1: Mild FEV1 ≥ 80% predicted; GOLD 2: Moderate 50% ≤ FEV1 < 80% predicted; GOLD 3: Severe 30% ≤ FEV1 < 50% predicted; GOLD 4: Very Severe FEV1 < 30% predicted
Global Initiative for Chronic Obstructive Lung Disease (GOLD), Global Strategy for Prevention, Diagnosis and Management of COPD: 2026 Report — Pocket Guide (2026) · Figure 2.10 (PDF page 20); key points (PDF page 11) · source
Contested: The fixed ratio 0.7 is contested against the lower limit of normal (z-score) approach used by ATS/ERS interpretation standards (not opened); the fixed ratio over-diagnoses in older and under-diagnoses in younger adults.
Not encoded: COPD also needs the appropriate clinical context (symptoms, exposures); the grade describes airflow obstruction only and never says COPD is present. Symptom and exacerbation assessment (GOLD ABE groups, mMRC, CAT) is not encoded. Pre-COPD and PRISm are not encoded. Whether the test was post-bronchodilator is asserted by the sender through the analyte name.