Of the 1037 subjects in the study, 220 (21%) required hospitalization for AECOPDs. The median MBL concentration in these 220 subjects was 1055 (95% CI 861-1213) ng/mL [1091 (958-1450) for those on azithromycin and 891 (816-1276) for those on placebo]. The median MBL concentration in the 817 subjects who were not hospitalized was 904 (833-980, P = 0.17, Table 4 ).