Kammerlind 2005.

Methods	Design: randomised controlled trial
Participants	Number: 54 Age: intervention group: mean age 52 (SD 12) years, comparator group: mean age 52 (SD 15) years Gender: intervention group: 11 male, comparator group: 18 male Setting: ENT departments of 3 hospitals Eligibility criteria: acute unilateral vestibular loss confirmed by ENG with calorics Exclusion criteria: central neurologic or auditory symptoms or other vertigo disease Baseline characteristics: the groups were similar for most measures except gender, as there were more males in the home training group
Interventions	Intervention group: VR (home exercises plus extra PT (habituation, adaptation, balance and gait) (extra PT included individualised instruction and further exercises) (n = 28) Comparator group: VR (home exercises only) (n = 26) VR versus VR
Outcomes	Primary outcome: balance tests (clinical) Secondary outcomes: ENG, vertigo (VAS), balance (VAS)
Notes	2 participants were lost to follow‐up at the 6‐month assessments in the intervention group and 1 in the comparator group
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)	Low risk	Sealed envelopes were used to inform participants of group allocation
Blinding (performance bias and detection bias) All outcomes	Low risk	Outcome assessors were blinded to group allocation
Incomplete outcome data (attrition bias) All outcomes	Low risk	Drop‐outs and missed sessions were reported
Selective reporting (reporting bias)	Low risk	Study protocol not available but all data appear to be reported
Other bias	Low risk	The study appears to be free of other sources of bias