Sputum procalcitonin levels
| Spontaneous | Induced | p-value | |
| Participants with bronchiectasis | |||
| Visit one | 0.001¶ | ||
| Median (IQR) | 1.7 (1.1–4.0) | 1.3 (0.5–2.0) | |
| Geometric mean (95% CI) | 1.8 (1.2–2.7) | 1.1 (0.7–1.8) | |
| Visit two | |||
| Median (IQR) | 2.4 (0.6–3.7) | 1.2 (0.7–2.4) | |
| Geometric mean (95% CI) | 1.5 (1.0–2.5) | 1.2 (0.8–1.6) | |
| Healthy participants | |||
| Visit one | |||
| Median (IQR) | 0.5 (0.2–1.2) | ||
| Geometric mean (95% CI) | 0.5 (0.3–0.9) | ||
| Procalcitonin concentration ratio between patients with bronchiectasis and healthy participants (95% CI) | 2.3 (1.2–4.4)# 3.6 (1.5–8.6)+ | 0.02# (0.006)+ |
¶: comparison of spontaneous sputum and induced sputum results in the bronchiectasis group using repeated measures ANOVA that pooled visit 1 and visit 2 data; #: comparison of bronchiectasis and healthy groups using mixed-effect repeated measures ANOVA that pooled visit 1 and visit 2 measurements of patients with bronchiectasis without adjusting for age and gender; +: adjusted for age and gender.