Wet weight of sputum expectorated: HFCWO compared with usual ACT
| Period of sputum collection | Expectorated sputum wet weight (g) | |||||
| Usual ACT | HFCWO | Mean difference | p Value | |||
| Mean (SD) | Median (IQR) | Mean (SD) | Median (IQR) | |||
| Single treatment session | 9.1 (7.9) | 7.2 (3.0–14.2) | 4.6 (4.1) | 3.4 (1.5–6.7) | 4.4 (3.5 to 5.4) | <0.001 |
| 24 h (excluding treatment)* | 22.4 (26.8) | 12.9 (4.0–29.9) | 24.9 (25.8) | 15.3 (3.9–40.1) | −1.5 (−4.6 to 1.6) | 0.352 |
| 24 h (including treatment) | 39.8 (36.3) | 25.5 (14.0–57.1) | 34.3 (30.7) | 26.3 (12.1–46.0) | 6.9 (3.1 to 10.8) | <0.001 |
Data are presented as mean (SD) or (95% CI) or median (IQR) as appropriate. Data are adjusted for randomisation, day, time and position of treatment using a mixed effects linear regression model.
↵* Of 116 24-h sputum samples collected, two were discarded as they were incomplete.
ACT, airway clearance technique; HFCWO, high frequency chest wall oscillation.