Yardley 2006.

Methods	Design: randomised controlled trial
Participants	Number: 360 Age: mean age 59.2 (SD 12.3) Gender: 113 males, 31.4% Setting: participants received the intervention in the community after being recruited from a Ménière's society Eligibility criteria: participants with Ménière's disease (non‐acute phase) who had experienced dizziness of imbalance in the last 12 months, had consulted their GP regarding involvement in the study Exclusion criteria: other vestibular disorder Baseline characteristics: no differences between groups on any of the participant characteristics
Interventions	Intervention group: VR (booklet of exercises) (n = 120) Comparator group 1: SC (booklet for self management) (n = 120) Comparator group 2: waiting list control (n = 120) VR versus other VR versus control
Outcomes	Primary outcomes: questionnaire (better versus same/worse), VSS, PEI Secondary outcomes: DHI, HADS, DBS, adherence
Notes	Only 17 participants of the sample of 360 failed to complete the final follow‐up
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "An independent research administrator allocated participants to the intervention arms using a computer randomisation program"
Allocation concealment (selection bias)	Low risk	Participants were sent a letter directly by the independent research administrator informing them of group allocation
Blinding (performance bias and detection bias) All outcomes	High risk	Neither participants nor assessors were blinded to group allocation. Outcomes were assessed by the use of questionnaires
Incomplete outcome data (attrition bias) All outcomes	Low risk	The drop‐out rate was reported to be 5%
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