🫁 Chronic disease

How well is your COPD controlled? Quantify it with the CAT score

The CAT (COPD Assessment Test) is an internationally used COPD symptom tool. Eight questions — cough, phlegm, chest tightness, breathlessness on a hill, activities at home, going out, sleep and energy — each scored 0-5, total 0-40; higher means greater impact. Its biggest value is comparison: test regularly and plot the trend — a fall means treatment is working, a rise often signals worsening and a need to see your doctor. Free; scored locally in your browser.

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Free · auto-scored · trend comparison · your data stays with you

For adults with confirmed or suspected COPD; reassess every 3-6 months or when symptoms change

Common questions

What CAT score counts as severe?
Common bands: 0-10 low impact, 11-20 medium, 21-30 high, 31-40 very high. But a single score is not the key — comparison with your own previous score matters more: a fall usually means treatment is working, a rise often signals worsening. Interpret with your doctor.
Can CAT diagnose COPD?
No. CAT is a symptom tool and does not replace spirometry (COPD is confirmed by FEV1/FVC <0.7) or a doctor's diagnosis. It helps you and your doctor quantify symptoms and track change.
How often should I test?
Generally every 3-6 months, when symptoms change clearly, or before and after a treatment change, so you can see the trend. Follow your doctor's advice.

Take two minutes to score your COPD symptoms

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This tool is for self-screening reference only. It does not constitute a diagnosis and does not replace an in-person assessment by a doctor. If you have concerns, seek care promptly.

Source: COPD Assessment Test (CAT) · CAT (COPD Assessment Test) © GlaxoSmithKline. Provided for patient self-assessment reference; copyright belongs to the original authors.

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