Comparison 1. Stable bronchiectasis: high‐frequency chest wall oscillation ACT vs no ACT (control).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Change in HRQoL	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
2 Change in FEV	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
3 Change in FVC	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
4 Change in TLC	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
5 Change in RV	1		Mean Difference (IV, Fixed, 95% CI)	Subtotals only
6 Change in PaO2	1		Mean Difference (IV, Fixed, 95% CI)	Subtotals only
7 Change in PaCO2	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
8 Change in breathlessness, cough and sputum	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
9 Change in MMRC dyspnoea scale	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected