Classifying the severity of airflow obstruction
| Post-broncho-dilator FEV1/FVC | FEV1 % predicted | NICE guideline CG101 (2010) severity of airflow obstruction (post-broncho-dilator) |
|---|---|---|
| <0.7 | >= 80% | Stage 1 -Mild |
| <0.7 | 50-79% | Stage 2- Moderate |
| <0.7 | 30-49% | Stage 3- Severe |
| <0.7 | <30% | Stage 4 – Very Severe |
NICE. Recommendations | Chronic obstructive pulmonary disease in over 16s: diagnosis and management | Guidance | NICE [Internet]. Nice.org.uk. NICE; 2018. Available from: https://www.nice.org.uk/guidance/ng115/chapter/Recommendations#diagnosing-copd
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