Hare 2002.

Study characteristics
Methods	Quasi‐RCT (alternate assignment). Parallel design. Location: single centre in USA. Duration: 2 weeks.
Participants	14 participants (10 males, 4 females). Age 8 ‐ 28 years. All participants admitted to hospital for 2‐week course of IV antibiotics, acute. No complications identified, no difference between groups in terms of clinical score, but clinical score not defined.
Interventions	Percussive device (IPV) versus CPT, not stated how many participants were randomised to each treatment group 4 times per day for 2 weeks.
Outcomes	FVC, FEV1 and FEF25-75 and RV. Participant‐reported satisfaction was noted. Measurements taken at admission and discharge.
Notes	Abstract only, no full paper.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Described as randomised, but no further details given.
Allocation concealment (selection bias)	High risk	Alternate assignment.
Blinding (performance bias and detection bias) All outcomes	Unclear risk	Not discussed.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not discussed.
Selective reporting (reporting bias)	High risk	Clinical score was used as an outcome measure but no clear definition of this parameter given. Significant differences were suggested but no data provided to support this.
Other bias	Unclear risk	Supported by Vortran Medical Technology 1, Inc., Sacramento, CA.