Table 1.
Clinical information and general data of included patients (80 cases)
| Items | Classification | COPD group (N, %) | Control group (N, %) |
|---|---|---|---|
|
| |||
| Gender | Male | 49 (61.3) | 22 (43.1) |
| Female | 31 (38.7) | 29 (56.9) | |
| Age (years) | <70 | 36 (45) | 30 (58.8) |
| ≥70 | 44 (55) | 21 (41.2) | |
| Pack years of smoking | >40 | 28 (35) | 15 (29.4) |
| 20.1–40 | 10 (12.5) | 6 (11.8) | |
| 0.1–20 | 3 (3.8) | 1 (1.9) | |
| 0 | 39 (48.7) | 29 (56.9) | |
| GOLD grade | 1 | 5 (6.2) | |
| 2 | 16 (20) | ||
| 3 | 32 (40) | ||
| 4 | 27 (33.8) | ||
| mMRC score | 2 | 11 (13.8) | |
| 3 | 35 (43.7) | ||
| 4 | 34 (42.5) | ||
| Clinical history (years) | <10 | 27 (33.7) | |
| ≥10 <20 | 23 (28.8) | ||
| ≥20 | 30 (37.5) | ||
Notes: GOLD grade: 1=FEV1% predicted is greater than or equal to 80%, 2=FEV1% predicted is greater than or equal to 50%, but less than 80%, 3=FEV1% predicted is greater than or equal to 30%, but less than 50%, and 4=FEV1% predicted is less than 30%; mMRC, dyspnea scale for symptom classification of COPD.
Abbreviations: GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified British Medical Research Council for dyspnea scale for symptom classification of COPD.