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GOLD 2011 classification (symptom/risk evaluation of COPD)
| Category | GOLD classification | Exacerbations per year | CAT scores | mMRC stage |
|---|---|---|---|---|
| A | 1–2 | ≤1 | <10 | 0–1 |
| B | 1–2 | ≤1 | ≥10 | ≥2 |
| C | 3–4 | ≥2 | <10 | 0–1 |
| D | 3–4 | ≥2 | ≥10 | ≥2 |
Abbreviations: COPD, chronic obstructive pulmonary disease; CAT, COPD Assessment Test; GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified Medical Research Council.
