Table 1.
Patient characteristics.
| Age (yr) | 68.6 ± 12.3 |
| Sex, n (%) | |
| Male | 32 (76%) |
| Female | 10 (24%) |
| BMI | 22.3 ± 4.3 |
| Heart rate (bpm) | 70.9 ± 11.2 bpm |
| Smoking status, N (%) | |
| Current or former | 32 (76%) |
| Never | 10 (24%) |
| Respiratory diseases, N (%) | 42 (100%) |
| COPD, N (%) | 21 (50%) |
| Interstitial pneumonia, N (%) | 6 (14%) |
| Nontuberculous mycobacterium, N (%) | 6 (14%) |
| Chronic bronchitis, N (%) | 4 (10%) |
| Acute bronchitis, N (%) | 1 (2%) |
| Bronchial asthma, N (%) | 1 (2%) |
| Pulmonary hypertension, N (%) | 1 (2%) |
| Others (bronchomalacia, malignant lymphoma), N (%) | 2 (8%) |
| Cardiovascular diseases, N (%) | 19 (45%) |
| Hypertension, N (%) | 14 (33%) |
| Stable angina, N (%) | 3 (7%) |
| Aortic regurgitation, N (%) | 2 (5%) |
| Paroxysmal atrial fibrillation, N (%) | 2 (5%) |
| Peripheral arterial disease, N (%) | 2 (5%) |
| Old myocardial infarction, N (%) | 1 (2%) |
| Lung function test | |
| VC (L) | 2.99 ± 0.85 L |
| %VC (%) | 96.3 ± 21.0% |
| FVC (L) | 2.94 ± 0.86 L |
| %FVC (%) | 94.9 ± 21.3% |
| FEV1 (L) | 1.99 ± 0.66 L |
| %FEV1 (%) | 88.0 ± 25.5% |
| FEV1/FVC ratio | 68.3 ± 14.3 |
Unless otherwise indicated, values are presented as the mean ± SD.
BMI: body mass index; COPD: chronic obstructive pulmonary disease; VC: vital capacity; %VC: percent vital capacity; FVC: forced vital capacity; %FVC: percent forced vital capacity; FEV1: forced expiratory volume in 1 s; %FEV1: percent forced expiratory volume in 1 s; SD: standard deviation.