COPD Assessment Test (CAT)
COPD Assessment Test (Jones 2009): eight symptom/impact items each scored 0–5 (cough, phlegm, chest tightness, breathlessness, activity limitation, confidence, sleep, energy) sum to 0–40.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Cough
- 4
- Phlegm
- 3
- Chest tightness
- 2
- Breathlessness on hills/stairs
- 4
- Activity limitation at home
- 3
- Confidence leaving home
- 2
- Sleep
- 3
- Energy
- 3
Result: CAT 24/40 — high impact (21–30); at or above the GOLD ≥ 10 "more symptoms" threshold.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Score
- Eight patient-completed items, each 0–5; total 0–40. Impact bands: low < 10, medium 10–20, high 21–30, very high > 30.
- Use
- GOLD uses ≥ 10 as the "more symptoms" threshold (drives ABE group assignment); the MCID is ~2 points. A patient-reported health-status instrument, not a treatment order.
What you enter
- Cough (0 never – 5 all the time)
- Phlegm (0–5)
- Chest tightness (0–5)
- Breathlessness on hills/stairs (0–5)
- Activity limitation at home (0–5)
- Confidence leaving home (0–5)
- Sleep (0–5)
- Energy (0–5)
How this is calculated
Jones PW, Harding G, Berry P, Wiklund I, Chen WH, Kline Leidy N. Development and first validation of the COPD Assessment Test. Eur Respir J. 2009;34(3):648-654. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.