Datasets from LTSs with (LTS+; n−=4; triangles) and without COPD (LTS−; n=9; squares) in Material 2 showing correlations between (A) level of MUC5AC and MUC5B in BAL samples; (B) level of large complexes of MUC5AC and MUC5B in BAL samples; (C) level of neutrophil elastase and MUC5B in BAL samples; (D) bacterial count (i.e., CFU for normal flora or pathogens) in lower airway samples and level of MUC5B in BAL samples; (E) level of serum cotinine and the proportion (%) of MUC5B present in large complexes in BAL samples. Solid (black) symbols denote subjects without bacterial colonization whereas open (white) symbols denote subjects with bacterial colonization. Analytical statistics are shown according to Spearman’s rank order correlation.