Gastro-oesophagal reflux indices in patients with and without bronchiolitis obliterans syndrome (BOS)
| BOS 0 | BOS 0p | BOS 1–2–3 | |
| Subjects n | 27 | 9 | 1 |
| Oesophageal acid exposure % | 3.6 (1.7–8.7) | 0.8 (0.5–3.9) | 1.9 (0.8–18.7) |
| Oesophageal volume exposure % | 0.8 (0.54–1.7) | 0.4 (0.3–1.5) | 0.5 (1.2–1.3) |
| Total number of reflux events 24 h−1 | 33 (29–48) | 49 (36–71) | 32 (9–45) |
| Acid reflux events n | 17 (13–24) | 4 (0–10) | 6 (2–20) |
| Nonacid reflux events n | 12 (6–19) | 21 (11–29) | 18 (6–33) |
| Proximal extent of reflux at 15 cm# | 12 (7–21) | 4 (1–13) | 13 (6–25) |
| Nocturnal reflux events n | 4 (2–6) | 2 (1–6) | 5 (3–9) |
Data are presented as median (25th–75th percentile), unless otherwise indicated. BOS 0: BOS not present; BOS 0p: probable BOS; BOS 1–2–3: BOS grade 1, 2 or 3 present. #: i.e. reflux events >15 cm.