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CAT scores according to modified Medical Research Council grade
| CAT score | Mean | SD | MIN | 25th percentile | Median | 75th percentile | MAX |
|---|---|---|---|---|---|---|---|
| mMRC 0 | 5.6 | 4.3 | 0 | 3 | 4 | 8 | 21 |
| mMRC 1 | 11.9 | 5.3 | 1 | 8 | 12 | 16 | 28 |
| mMRC 2 | 17.0 | 6.5 | 5 | 13 | 16 | 21 | 37 |
| mMRC 3 | 22.5 | 5.8 | 9 | 18 | 22.5 | 27 | 33 |
| mMRC 4 | 23.3 | 3.6 | 18 | 21 | 24.5 | 25.5 | 26 |
CAT, chronic obstructive pulmonary disease (COPD) assessment test; SD, standard deviation; MIN, minimum; MAX, maximum; mMRC, modified Medical Research Council.
