Baseline characteristics of 182 outpatients with cardiorespiratory disease
| Characteristic | Non-missing observations, n | Value |
| Age (years) | 182 | 68.6±13.8 |
| Female | 182 | 97 (53.3) |
| Main cause of breathlessness | 179 | |
| Chronic obstructive pulmonary disease | 45 (24.7) | |
| Asthma | 39 (21.4) | |
| Heart failure | 35 (19.2) | |
| Idiopathic pulmonary fibrosis | 34 (18.7) | |
| Other interstitial lung disease | 10 (5.5) | |
| Other | 16 (8.8) | |
| FEV1 (L) | 152 | 1.89±0.78 |
| FEV1, % of predicted | 152 | 75.2±25.8 |
| VC | 148 | 2.73±0.95 |
| VC, % of predicted | 148 | 78.7±20.7 |
| FEV1/VC | 152 | 0.66±0.16 |
| Smoking status | 180 | |
| Current smoker | 19 (10.4) | |
| Former smoker | 107 (58.8) | |
| Never smoker | 54 (29.7) | |
| Weight (kg) | 182 | 78.4±19.2 |
| Height (cm) | 181 | 168.7±9.0 |
| Body mass index (kg/m2) | 181 | 27.4±6.2 |
Data are presented as mean±SD or frequency (percentage). VC is the highest value of the slow and forced VC.
FEV1, forced expiratory volume in one second; VC, vital capacity.