Table 2. Proportion of each COPD group (A–D) and agreement when categorised based on the cut-point CAT score ⩾10 and each mMRC cut-point.
|
COPD group (%) |
Kappa value | P value | ||||
|---|---|---|---|---|---|---|
| A | B | C | D | |||
| CAT⩾10 | 30.6 | 17.3 | 22.2 | 29.6 | Reference | |
| mMRC⩾1 | 3.2 | 45.0 | 2.4 | 49.4 | 0.36 | 0.000* |
| mMRC⩾2 | 22.2 | 26.0 | 15.9 | 35.9 | 0.49 | 0.000* |
| mMRC⩾3 | 41.6 | 6.6 | 34.6 | 17.2 | 0.55 | 0.000* |
| mMRC=4 | 48.0 | 0.3 | 47.8 | 0.4 | 0.40 | 0.000* |
Abbreviations: CAT, COPD assessment test; COPD, chronic obstructive pulmonary disease; mMRC, modified Medical Research Council dyspnoea scale. *P<0.05.