Patient characteristics and diagnoses

Male97 (56.7)
Age years (mean (range))75.9 (42.8–91.8)
Ex-smoker134 (78.4)
Lives alone45 (26.3)
Lives in nursing home19 (11.1)
Primary respiratory diagnosis
 COPD142 (83.0)
 Pulmonary fibrosis14 (8.9)
 Bronchiectasis7 (4.1)
 Coexisting second respiratory condition107 (62.6)
Comorbidities (mean (range))6.8 (0–14)
 Anxiety65 (38.0)
 Depression51 (29.8)
 Cardiac disease119 (69.6)
 Cardiac comorbidities (mean (range))1.5 (0–5)
Pulmonary function n=169
 FEV1 L (median (IQR))0.8 (0.6–1.1)
 FEV1 % pred (median (IQR))41.5 (32.0–55.8)
 FVC L (median (IQR))2.2 (1.7–2.7)
 FVC % pred (median (IQR))83 (65.3–101.8)
DLCO (median (IQR))8 (6–10)
DLCO % pred (median (IQR))37.5 (29.0–48.0)
 6MWD on air m (median (IQR)) n=16380 (0–222.5)
PaO2 mmHg (median (IQR)) n=11557.1 (51.1–64.0)
PaCO2 mmHg (median (IQR)) n=11545.0 (39.3–50.9)
 Domiciliary oxygen use111 (64.9)
 mMRC Dyspnoea scale score (median (IQR))4 (2–4)
  mMRC Dyspnoea scale score 1–248 (26.9)
  mMRC Dyspnoea scale score 3–4123 (73.1)

Data are presented as n or n (%), unless otherwise stated. COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in 1 s; IQR: interquartile range; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide; 6MWD: 6-min walk distance; PaO2: arterial oxygen tension; PaCO2: arterial carbon dioxide tension; mMRC: modified Medical Research Council.