Table 3.

Cross-tabulation of the old and new symptom groups when the new CAT criterion was applied

Variable	mMRC grade < 2 andCAT score < 15	mMRC grade < 2 and CAT score ≥ 15	mMRC grade ≥ 2 and CAT score < 15	mMRC grade ≥ 2 and CAT score ≥ 15	Total
mMRC grade < 2 & CAT score < 10	107	0	0	0	107 (25.0a, 100.0b)
mMRC grade < 2 & CAT score ≥ 10	77	65	0	0	142 (33.2a, 44.2c)
mMRC grade ≥ 2 & CAT score < 10	0	0	16	0	16 (3.7a, 5.0c)
mMRC grade ≥ 2 & CAT score ≥ 10	0	0	35	128	163 (38.1a, 50.8c)
Total	184 (43.0a, 100.0b)	65 (15.2a, 26.6c)	51 (11.9a, 20.9c)	128 (29.9a, 52.5c)	428 (100.0)

Values are presented as number (%).

CAT, chronic obstructive pulmonary disease (COPD) assessment test; mMRC, modified Medical Research Council.

^aPercentage among all of the patients.

^bPercentage among the less symptoms group.

^cPercentage among the more symptoms group.