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. 2023 May 31;18(5):e0285830. doi: 10.1371/journal.pone.0285830

Fig 3. Pulmonary function testing in patients stratified by pre-existing respiratory disease before and during hyperbaric oxygen therapy.

Fig 3

Measurements of pulmonary function among patients stratified by pulmonary disease. Circles represent patients without known pulmonary disease before (n = 72) hyperbaric oxygen therapy (Pre-HBOT) and after 20 (n = 67), 40 (n = 41), and 60 (n = 12) treatment sessions, and triangles represent patients with pre-existing respiratory disease before (n = 14) hyperbaric oxygen therapy (Pre-HBOT) and after 20 (n = 14) and 40 (n = 11) treatment sessions. FEV1% is represented in panel A, FVC% in panel B, and FEF25-75% in panel C. Points represent subgroup means at each timepoint, and bars delineate a confidence limit of 95%. Abbreviations: FEV1% = percentage of predicted forced expiration volume in one second; FVC% = percentage of predicted forced vital capacity; FEF25-75% = percentage of predicted mid-expiratory flow.