Baseline characteristics of the patients (n=141)

Age years
 Median69 (60–74)
 Female55 (39.0)
 Male86 (61.0)
Smoking status
 Never smoker55 (39.0)
 Current smoker23 (16.3)
 Previous smoker63 (44.7)
Pulmonary function tests
 FEV1 L2.5 (2.0–2.9)
 FEV1 % pred89.0 (76.0–98.0)
 FVC L3.1 (2.6–3.7)
 FVC % pred87.1 (77.8–102.0)
 TLC L4.8 (4.1–5.6)
 TLC % pred77.0 (68.2–86.0)
DLCO % pred57.0 (40.0–64.0)
 6MWD m435 (99–520)
Primary presumptive diagnosis prior to TBCB
 UIP/IPF49 (34.5)
 NSIP23 (16.2)
 HP17 (12.0)
 CTD-ILD16 (11.3)
 Unclassified ILD14 (9.9)
 Unclassifiable ILD7 (4.9)
 Other15 (10.6)
TBCB biopsy site
 Right upper lobe0 (0)
 Right middle lobe2 (1.4)
 Right lower lobe124 (87.9)
 Left upper lobe0 (0)
 Left lower lobe15 (10.6)

Date are presented as n–n, n (%) or median (IQR) unless otherwise stated. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; TLC: total lung capacity; DLCO: diffusing capacity of the lung for carbon monoxide; 6MWD: 6-min walk distance; TBCB: transbronchial cryobiopsy; UIP: usual interstitial pneumonia; IPF: idiopathic pulmonary fibrosis; NSIP: nonspecific interstitial pneumonia; HP: hypersensitivity pneumonitis; CTD-ILD: connective tissue disease-associated ILD.