Alexander 2019.

Study characteristics
Methods	Design: single‐centre, parallel RCT   Location: no details given on hospital, city or country Inclusion criteria: not specified Exclusion criteria: not specified Duration: 12 weeks
Participants	15 prepubertal children with CF, mean age 7.94 (SD 1.35) years Intervention group (n = 9): no further details available Control group (n = 6): no further details available
Interventions	12‐week, home‐based, whole body vibration exercise training programme Intervention group: 12‐week, home‐based, whole body vibration training programme (5 times per week for 20 min) combined with their regular airway clearance therapy regimen.  Control group: usual airway clearance therapy regimen.
Outcomes	Primary outcome Change in total body lean body mass (DEXA) from baseline to 12 weeks Secondary outcomes Change in quality of life from baseline to 12 weeks Change in bone parameters from baseline to 12 weeks Change in spirometry indices from baseline to 12 weeks
Notes	Study reported as an abstract and, therefore, the information was limited.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Described as randomised, but no details given for sequence generation.
Allocation concealment (selection bias)	Unclear risk	Not discussed.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not possible to blind participants to intervention. Unclear whether personnel blinded.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Unclear whether outcomes assessors blinded.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No details of dropouts or whether intention‐to‐treat analysis was used.
Selective reporting (reporting bias)	Unclear risk	Abstract so unable to assess if all outcomes used in methods were reported in results.
Other bias	Unclear risk	Did not state inclusion or exclusion criteria, neither did they describe the methods of statistical analysis used.