CAT Score Calculator
COPD Assessment Test
The COPD Assessment Test (CAT) is a validated, patient-completed questionnaire that measures the impact of Chronic Obstructive Pulmonary Disease (COPD) on a person’s health status and daily life.
For each item, select the response that best describes your current experience. Scores range from 0 (no impairment) to 5 (maximum impairment).
COPD Assessment Test
Clinical Interpretation
Based on the calculated score, the patient has low impact from COPD symptoms.
GOLD Classification Significance
A CAT score < 10 indicates "less symptoms" in the GOLD ABCD assessment tool.
Clinical Use in GOLD Classification
In the GOLD ABCD assessment tool, a CAT score ≥ 10 indicates “more symptoms” and helps classify patients into Groups B or D, which guides treatment decisions.
CAT Score Interpretation
| CAT Score Range | Impact Level | Clinical Significance |
|---|---|---|
| 0-10 | Low Impact | Mild COPD impact on health status |
| 11-20 | Medium Impact | Moderate COPD impact on health status |
| 21-30 | High Impact | Severe COPD impact on health status |
| 31-40 | Very High Impact | Very severe COPD impact on health status |
Advantages of CAT
- More comprehensive than mMRC (which only measures breathlessness)
- Sensitive to changes over time
- Correlates well with other health status measures
- Available in multiple languages
- Quick to complete (2-3 minutes)
- Patient-centered assessment
Limitations
- Subjective measure (patient-reported)
- Does not replace objective measures like spirometry
- May be influenced by comorbidities
- Requires patient literacy and understanding
The COPD Assessment Test (CAT) is a validated, patient-completed questionnaire that measures the impact of Chronic Obstructive Pulmonary Disease (COPD) on a person's health status and daily life.
Key Features:
- 8-item questionnaire covering common COPD symptoms and impacts
- Simple scoring: 0-5 for each item, with total scores ranging from 0-40
- Patient-reported: Completed by the patient, providing subjective insight into their experience
- Quick to administer: Takes about 2-3 minutes to complete
- Validated tool: Widely used in clinical practice and research
The 8 CAT Domains:
- Cough
- Phlegm (mucus)
- Chest tightness
- Breathlessness
- Activities (limitations)
- Confidence leaving home
- Sleep
- Energy
Score Interpretation:
| CAT Score Range | Impact Level | Clinical Significance |
|---|---|---|
| 0-10 | Low Impact | Mild COPD impact |
| 11-20 | Medium Impact | Moderate COPD impact |
| 21-30 | High Impact | Severe COPD impact |
| 31-40 | Very High Impact | Very severe COPD impact |
Clinical Utility:
- GOLD Classification: A CAT score ≥10 indicates "more symptoms" in the ABCD assessment tool
- Treatment Monitoring: Tracks changes in health status over time
- Clinical Decisions: Helps guide therapy adjustments and rehabilitation needs
- Patient Communication: Facilitates discussion about symptom burden and quality of life
Advantages:
- More comprehensive than mMRC (which only measures breathlessness)
- Sensitive to changes over time
- Correlates well with other health status measures
- Available in multiple languages
The CAT provides a simple, standardized way to quantify how COPD affects patients' lives beyond just lung function measurements, making it invaluable for comprehensive COPD management.
