Fig. 1
From: Risk of lung disease in the PI*SS genotype of alpha-1 antitrypsin: an EARCO research project
Dot plot displaying standardized mean differences in baseline characteristics between ZZ and SS patients, before (N = 468) and after (N = 185) propensity score matching
Footnote: To match the two cohorts, we used a 1:3 nearest-neighbour matching with age, sex, pack-years and center, without replacement