Fig. 3

Diffusion capacity in relation to irregular opacities according to ICOERD classification 6. (A) DLCO (black) and DLNO (grey) for irregular opacities, n = 224, all patients with emphysema with a score of at least 1 were excluded. (B) DLCO/VA (black) and DLNO/VA (grey) for irregular opacities, n = 224, all patients with emphysema with a score of at least 1 were excluded. (C) DLCO before (solid line, n = 371) and after (dashed line, n = 224) exclusion of all patients with emphysema with a score of at least 1 (D) DLNO before (solid line, n = 371) and after (dashed line, n = 224) exclusion of all patients with emphysema with a score of at least 1. Mean ± SD plus simple linear regression with Pearson correlation.