Data of the participants
| Age (median), years | Male/female | FEV1 (% of expected value) | FVC (% of expected value) | DLCO, % of expected value | |
|---|---|---|---|---|---|
| COPD, LTOT | 58–64 (63.5) | 4/4 | 0,52–1,69 l (17–49) | 1,33–2,22 l (34–55) | – |
| COPD, no LTOT | 51–64 (60.0) | 4/4 | 0,38–1,30 l (14–47) | 0,80–2,81 l (24–57) | – |
| ILD | 39–60 (51.0) | 4/4 | 1,24–2,41 l (47–84) | 1,69–4,34 l (54–97) | 38–47 |
| Controls | 44–61 (55.0) | 4/4 | – | – | – |
COPD, chronic obstructive pulmonary disease; DLCO, diffusion capacity of the lung for carbon monoxide; FEV1, forced expiratory volume in 1 sec; FVC, forced vital capacity; ILD, interstitial lung disease; LTOT, long-term oxygen therapy.