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Table 1 Baseline characteristics

From: Tracking dyspnea up to supplemental oxygen prescription among patients with pulmonary fibrosis

  Prescribed O2
N = 28
Not Prescribed O2
N = 166
P value
Female 10 (36) 83 (50) 0.15
Age, yrs 67.5 ± 7.9 67.9 ± 9.6 0.99
Smoking
 Current 1 (4) 2 (1)  
 Former 15 (54) 86 (52)  
 Never 12 (43) 78 (47) 0.61
State of residence
 Colorado 4 (14) 67 (41)  
 New Mexico 1 (4) 12 (7)  
 Texas 3 (11) 12 (7)  
 Other 20 (71) 75 (45) 0.03
Pulmonary fibrosis
 IPF 20 (71) 41 (25)  
 CTD 4 (14) 62 (37)  
 cHP 2 (7) 14 (8)  
 FPF 1 (4) 11 (7)  
 Other 1 (11) 38 (23) < 0.0001
Surgical biopsy 11 (39) 59 (36) 0.61
FVC% 67.3 ± 17.5 77.81 ± 30.3a 0.008
DLCO% 52.5 ± 12.9 64.3 ± 15.4b 0.0016
Enrollment UCSD score 38.4 ± 19.6 22.6 ± 18.7 < 0.0001
Duration of follow-up, days 270.1 ± 201.5 473.6 ± 191.5 < 0.0001
  1. a N = 156 with FVC within 4 months of enrollment
  2. b N = 142 with DLCO within 4 months of enrollment
  3. IPF idiopathic pulmonary fibrosis, CTD connective tissue disease-related pulmonary fibrosis, cHP chronic hypersensitivity pneumonitis, FPF familial pulmonary fibrosis; “Other” includes drug-induced, asbestosis, unclassifiable