Fig. 2
From: Regional lung densities in alpha-1 antitrypsin deficiency compared to predicted values
Relation between standard mass score and percent predicted values for DLCO and FEV1. The green horizontal line indicates the lower limit of normal SMS; the dotted vertical line indicate lower limit of normal pulmonary function. Note that no normal FEV1 values (> 80%) were observed because 70% predicted was an exclusion criterion for the RAPID trial (natural variation in FEV1 values causes the occurrence of baseline values above the exclusion criterion)