Demographic data
| Sex | |
| Female % (n) | 40.3% (81) |
| Male % (n) | 59.7% (120) |
| Age | |
| Mean±SD (range) | 78.7±8.8 (49-100) |
| Body mass index | |
| Mean±SD (range) | 29.0±5.3 (18.7–48.0) |
| Weight (kg) | |
| Mean±SD (range) | 81.8±17.8 (43.5–147.4) |
| Chronic obstructive pulmonary disease | 17.4% (35) |
| Asthma | 13.9% (28) |
| Smoking status | |
| Never % (n) | 37.8% (76) |
| Former % (n) | 57.7% (116) |
| Current % (n) | 4.5% (9) |
| Obstructive sleep apnoea % (n) | 21.9% (44) |
| Home oxygen % (n) | 2.5% (5) |
| Glomerular filtration rate (mL/min) | |
| Mean±SD (range) | 54.7±10.0 (6-60) |
| Left ventricular ejection fraction (%) | |
| Mean±SD (range) | 58.5±13.8 (10-80) |
| Right ventricular systolic pressure (mm Hg) | |
| Mean±SD (range) | 37.6±12.8 (18-90) |