Table 3.

Changes of COPD assessment test (CAT) score after therapy (N = 52)

Clinical variable	BOS diagnosis	3 months treatment	P-value
Q1. Cough	1.5 (0–2)	1 (0–2)	.022
Q2. Phlegm	1 (0–2)	1 (0–2)	.983
Q3. Chest tightness	2 (1–3)	1 (0–2)	.000
Q4. Breathlessness going up hills/stairs	3 (2–4)	3 (1.25-3)	.002
Q5. Activity limitation at home	1 (0–2)	0 (0–1)	.054
Q6. Confidence leaving home	1 (0–3)	1 (0–2)	.013
Q7. Sleep	2 (1–3)	1 (0–2.75)	.004
Q8. Energy	2 (2–3)	2 (1–3)	.035
Total sum of the eight items	15.5 (9.25–19.0)	11.0 (6.0–15.75)	.001

Data represent the median (IQR). P-values shown in bold are significant at the 0.05 level