Szturm 1994.

Methods	Design: randomised controlled trial
Participants	Number: 23 (3 participants with bilateral vestibulopathy) Age: intervention group: mean age 50.3 (SD 7.0), comparator group: mean age 48.1 (SD 10.9) Gender: intervention group: 6 males, comparator group: 6 males Setting: Department of Otolaryngology, university Eligibility criteria: clinical diagnosis of peripheral vestibular dysfunction, persistent dizziness, disorientation or imbalance for at least 1 year, and abnormal balance performance during CDP at baseline Exclusion criteria: other neurological disorders, taking medication for their vestibular condition Baseline characteristics: no differences were reported
Interventions	Intervention group: VR (n = 11) Comparator group: VR (home, C‐C) (n = 12) VR versus VR
Outcomes	Primary outcome: CDP Secondary outcomes: VOR, OKN (step chair rotations)
Notes	No participants were lost to follow‐up
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information about the sequence generation process
Allocation concealment (selection bias)	Unclear risk	Insufficient information about the method of allocation
Blinding (performance bias and detection bias) All outcomes	Unclear risk	It is not clear whether outcome assessors were blinded to group allocation
Incomplete outcome data (attrition bias) All outcomes	High risk	It appears that data are missing from Group B participants but this is not adequately explained in the results
Selective reporting (reporting bias)	High risk	Data not reported adequately to enable meta‐analysis
Other bias	Low risk	The study appears to be free of other sources of bias