FIGURE 2.

a) Forced expiratory volume in 1 s (FEV₁) and b) 6-min walk test (6MWT) distance by bronchiectasis in any lobe/vascular pruning in the lower lobes groups (n=485). Group 0: bronchiectasis⁻/vascular pruning⁻ (n=187); group 1: bronchiectasis⁺/vascular pruning⁻ (n=82); group 2: bronchiectasis⁻/vascular pruning⁺ (n=143); group 3: bronchiectasis⁺/vascular pruning⁺ (n=73). Note that group 3 had lower FEV₁ and 6MWT distance than group 1. p-values are from univariate models. See the main text for the results of the adjusted models. One subject was excluded from these analyses because of a missing right lower lobe ratio of blood vessel volume in vessels <5 mm² in cross-section to total blood vessel volume, leaving a sample size of 485. The 6MWT distance measurement was missing in two additional subjects.