Table 2 Clinical characteristics of patients at baseline

Time since COPD diagnosis (years),^a mean (SD)

3.8 (6.2)

Diagnosed as chronic bronchitis, n/N (%)

3295/4978 (66.2)

Diagnosed as emphysema, n/N (%)

3204/4978 (64.4)

COPD signs and symptoms, n/N (%)

 Shortness of breath

2864/4975 (57.6)

 Wheezing

3296/4975 (66.3)

 Chest tightness

3324/4975 (66.8)

 Cough

4037/4975 (81.1)

 Mucus purulence

4011/4975 (80.6)

Blood eosinophil counts ≥ 100 cells/μL, n/N (%)

378/564 (67.0%)

Blood eosinophil counts ≥ 300 cells/μL, n/N (%)

109/564 (19.3%)

CAT score,^b mean (SD)

14.6 (7.6)

mMRC score,^b mean (SD)

1.4 (1.0)

COPD-Q score,^c mean (SD)

5.9 (2.0)

Patients with exacerbation in previous 12 months, n/N (%)

2459/4978 (49.4)

Annual exacerbations per patient, mean (SD), range

0.9 (1.5), 0–20

Annual exacerbations leading to outpatient visit per patient, mean (SD), range

0.3 (1.0), 0–11

Annual exacerbations leading to emergency room visit per patient, mean (SD), range

0.2 (0.6), 0–14

Annual exacerbations leading to hospitalisation per patient, mean (SD), range

0.5 (0.9), 0–10

Concurrent respiratory diseases,^d n/N (%)

1288/4978 (25.9)

Asthma

437/4978 (8.8)

Respiratory infection

422/4978 (8.5)

Bronchiectasis

151/4978 (3.0)

Non-respiratory comorbidities,^d n/N (%)

1981/4978 (39.8)

Hypertension

1028/4978 (20.7)

Coronary artery disease

313/4978 (6.3)

Diabetes mellitus

247/4978 (5.0)

Benign prostatic hyperplasia

168/4978 (3.4)

Chronic gastritis

111/4978 (2.2)