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Table 1 Baseline characteristics for O2 users and O2 non-users with fILDs

From: Supplemental oxygen users with pulmonary fibrosis perceive greater dyspnea than oxygen non-users

  O2 (N = 812) No O2 (N = 514) P-
Age (years) 68.3 ± 10.5 66.6 ± 11.0 0.004
Female (%) 327 (40.3) 211 (41.1) 0.78
Smoking* 4 (0.6 %) 3 (0.6 %) 0.003
 Present 471 (65.9 %) 277 (57.4 %)  
 Past 240 (33.6 %) 203 (42.0 %)  
 Never    
BMI 30.3 ± 6.9 28.5 ± 5.5 <0.0001
IPF diagnosis (%) 303 (37.3) 170 (33.1) 0.12
FVC% within 30 days** 61.3 ± 18.9 77.5 ± 17.4 <0.0001
DLCO% within 30 days*** 37.5 ± 12.8 56.1 ± 16.5 <0.0001
6MWD (feet) 1070.6 ± 361.4 1421.4 ± 343.7 <0.0001
Borg Dyspnea 3.9 ± 2.0 2.9 ± 1.7 <0.0001
Borg Exertion**** 3.2 ± 2.1 2.4 ± 1.8 <0.0001
HR baseline 79.7 ± 13.9 78.1 ± 13.2 0.03
HR at 6 min 109.7 ± 15.9 110.9 ± 15.8 0.18
HR rise 30.0 ± 14.5 32.8 ± 13.7 0.0004
SpO2 baseline 97.4 ± 1.9 95.2 ± 1.7 <0.0001
SpO2 at 6 min 88.1 ± 5.3 88.7 ± 5.4 0.04
SpO2 drop 9.2 ± 5.5 6.4 ± 5.2 <0.0001
  1. Values are mean and standard deviation or count (percent); IPF idiopathic pulmonary fibrosis; BMI body mass index; FVC% percent predicted forced vital capacity; DLCO% percent predicted diffusing capacity of the lung for carbon monoxide; 6MWD distance walked during six-minute walk test (6MWT); SpO2 peripheral oxygen saturation; HR heart rate; O2 completed 6MWT using supplemental oxygen; No O2 completed 6MWT without using supplemental oxygen; *N = 715 for O2 users and 483 for non-users; **N = 446 for O2 users and 251 for non-users; ***N = 211 for O2 users and 123 for non-users; ****N = 672 for O2 users and 415 for non-users