Table 1. Cough and Sputum Scores
Chronic Bronchitis
Emphysema
P-value
Mean cough score
1.20
0.98
<0.0001
Cough score ≥ 2
193 (22.8%)
58 (14.0%)
0.0003
Mean sputum score
1.05
1.12
0.11
Sputum score ≥ 2
160 (18.9%)
87 (21.1%)
0.36