Fig. 2.
Sequential pulmonary function tests (PFTs) for nonobese (n = 23) and obese IPF (n = 21) groups. (A) Forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1) in liters, and (B) diffusion capacity for carbon monoxide (DLCO) in mL/min/mm Hg, respectively, showing progressive decline during the disease course; however, not statistically different between the groups. Time 1,2,3 indicates 3 PFT measurements done at the time of diagnosis, intermediate, and the latest, respectively, within the study duration (2015–2019).