Ratio of blood vessel volume in vessels <5 mm2 in cross-section (BV5) to total blood vessel volume (TBV) by lung lobe and bronchiectasis status
| Lung lobe | Subjects without bronchiectasis | Subjects with bronchiectasis | p-value |
| Right upper lobe | 64±7 | 65±8 | 0.90 |
| Right middle lobe | 54±9 | 54±10 | 0.91 |
| Right lower lobe | 58±7 | 55±9 | 0.004 |
| Left upper lobe | 62±7 | 61±7 | 0.87 |
| Left lower lobe | 55±9 | 51±10 | 0.0008 |
Data are presented as mean±sd, unless otherwise stated. Results are from univariate comparisons of BV5/TBV×100 between subjects with bronchiectasis in a specific lobe only and those without bronchiectasis in any lobe. Missing values: one subject had no lobar vascular measurements and one subject had no vascular measurement in the right middle lobe.