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Table 3 Outcome measures

From: Internet-based vestibular rehabilitation versus standard care after acute onset vertigo: a study protocol for a randomized controlled trial

Level of outcome Outcome measures
Primary outcome The vertigo symptom scale short form (VSS-SF) score at 6 weeks after vertigo onset.
Secondary outcomes The between-groups mean dizziness handicap inventory (DHI) score at 6 weeks and 3 months after vertigo onset.
The between-groups changes in timed 25-foot walk test (T25-FW) and timed balance tests from baseline to 6 weeks and 3 months; the between groups body sway during standing and walking (measured by a mobile phone placed on the hip); the time duration for each test and the mobility (number of steps) at 6 weeks and 3 months after vertigo onset.
The between-groups changes in video head impulse test (vHIT, site-dependent) measured lateral canal VOR gain and saccades from baseline at 6 weeks and 3 months after vertigo onset.
The between-groups mean vertigo symptom scale short form (VSS-SF) score at 3 months and 12 months after vertigo onset, and the between-group pedometer-derived number of steps walked since last visit at 6 weeks and 3 months after vertigo onset.
The between-groups mean number of weekly training sessions at 6 weeks.
Health economic effects on all levels of care (primary, specialized) and society (sick leave).
The added value from using a multi-sensor movement analysis system to receive multi-joint kinematic output during 25-foot-walk and balance tests, in comparison to using a mobile phone placed on the hip to receive center-of-mass kinematic output.
The reliability and validity of the Swedish VSS-SF translation.
The frequency (percentage) of participants with BPPV at 3 months after AVS onset; symptoms indicating BPPV 6 weeks after an AVS using a BPPV-specific questionnaire; positional nystagmus (non-BPPV) 3 months after an AVS; positional vertigo (non-BPPV) 3 months after an AVS; BPPV in the treatment vs control group; and the DHI/VSS-SF/steps/safety results differences between the BPPV, suspected BPPV and non-BPPV groups.