Fig. 2b
From: Idiopathic pulmonary fibrosis in the United States: time to diagnosis and treatment
Timing of Oxygen Initiation, After IPF Diagnosis, N = 8,364. (Timing of initiation of supplemental oxygen use before or after the index diagnosis of IPF. B. Relative timing of oxygen initiation in patients that were begun on oxygen therapy after the coded index diagnosis of IPF. Shown are the relative percentage of the total patients (N = 8,364) begun on oxygen therapy after the diagnosis of IPF, with the time of oxygen use expressed in years after the diagnosis of IPF).