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Table 4 Dyspnea and other results for O2 users and O non-users among subjects whose nadir SpO2 was 89 % or greater (nadir SpO2 ≥ 89 %)

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

  O2 (N = 373) No O2 (N = 262) P
6MWD 1092.4 ± 333.8 1427.4 ± 316.4 <0.0001
BMI 30.4 ± 6.9 28.2 ± 5.8 <0.0001
Borg Dyspnea 3.4 ± 1.9 2.4 ± 1.6 <0.0001
Borg Exertion* 2.9 ± 2.1 2.2 ± 1.7 <0.0001
HR baseline 79.0 ± 14.0 78.0 ± 13.0 0.37
HR at 6 min 106.7 ± 15.3 109.0 ± 15.1 0.06
HR rise 27.7 ± 13.7 31.0 ± 11.8 0.001
SpO2 baseline 97.6 ± 1.7 95.7 ± 1.6 <0.0001
SpO2 at 6 min 91.4 ± 5.2 91.4 ± 5.7 0.97
SpO2 drop 6.5 ± 2.4 4.6 ± 1.9 <0.0001
  1. Values are mean and standard deviation; 6MWD distance walked during six-minute walk test (6MWT), O2 completed 6MWT using supplementaloxygen, No O2 completed 6MWT without using supplemental oxygen,HR heart rate, SpO2 peripheral oxygen saturation; *N = 317 for O2 users and 211 for non-users