Participant characteristics (n=36)

HealthyMild ILDSevere ILD
Participants n131013
Males/females (% females)8/5 (38.5%)6/4 (40%)8/5 (38.5%)
Age years60±960±965±5
BMI kg·m−225±327±426±3
FVC % predicted101±1481±1759±20*
DLCO % predicted69 ±1448 ±15*
6MWD m558±107397±71*
6MWD % predicted83±1562±13*
Hb g·L−1148±11136±19
Hct L·L−10.43±0.020.41±0.05
Estimated FIO20.45±0.1#
 Hypersensitivity pneumonia2

Data are presented as mean±sd unless otherwise stated. ILD: interstitial lung disease; BMI: body mass index; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide; 6MWD: 6-min walking distance; Hb: haemoglobin; Hct: haematocrit; FIO2: inspiratory oxygen fraction; IPF: idiopathic pulmonary fibrosis; NSIP: nonspecific interstitial pneumonia; DIP: desquamative interstitial pneumonia; COP: cryptogenic organising pneumonia; NYD: not yet diagnosed; LAM: lymphangioleiomyomatosis; RA: rheumatoid arthritis. #: during testing, determined from [7]; nasal cannulae regular 3–4 L·min−1 (n=5), nasal cannulae high flow 6–15 L·min−1 (n=5), Oxymizer 4–10 L·min−1 (n=3). *: p≤0.05 for differences between groups.