Baseline characteristics of participants
| Characteristic | Bronchiectasis group | Healthy group |
| Subjects (n) | 30 | 15 |
| Age (years) | 67±11 | 43±11 |
| Gender (female) | 21 (70%) | 10 (67%) |
| Ethnic origin (%) | ||
| European | 19 (63%) | 12 (80%) |
| Pacific | 6 (20%) | 0 (0%) |
| Maori | 4 (13%) | 1 (7%) |
| Other | 1 (4%) | 2 (13%) |
| Spirometry | ||
| FEV1 (L) | 1.87±0.62 | 3.31±0.89 |
| FEV1 % pred | 73.7±16.8 | 98.6±11.7 |
| FVC (L) | 2.71±0.89 | 4.06±1.05 |
| FVC % pred | 79.7±12.5 | 98.7±11.5 |
| FEV1/FVC (%) | 69.7±10.3 | 75.2±21.0 |
| C-reactive protein (mg·L−1) | 2.8 (2.0–3.9)¶ | 1.6 (1.0–2.4)¶ |
| ESR (mm·h−1) | 22.7 (17.7–29.1)¶ | 8.8 (6.4–12.0)¶ |
| Radiological severity# | 3 (2–4)+ | N/A |
| BSI severity score | N/A | |
| Mild | 10 | |
| Moderate | 13 | |
| Severe | 7 |
Data are n (%) or mean±sd, unless otherwise stated. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; ESR: erythrocyte sedimentation rate; BSI: Bronchiectasis Severity Index (range 0–24). ¶: geometric mean (95% CI); #: median (IQR); +: number of lobes with bronchiectasis.