Appendix 1: Codes used for thematic analysis of semi-structured interviews BODY FUNCTION ICF category b110 (Consciousness functions)** b114 (Orientation functions)** b130 (Energy and drive functions) b134 (Sleep functions) b140 (Attention functions) b144 (Memory functions) b152 (Emotional functions) b210 (Seeing functions) b230 (Hearing functions) b240 (sensations associated with hearing and vestibular function) b280 (Sensation of pain) b455 (Exercise tolerance functions) b730 (Muscle power functions) b770 (Gait pattern functions) ACTIVITIES AND PARTICIPATION ICF category d230 (Carrying out daily routine) d410 (Changing basic body position) d415 (Maintaining a body position) d475 (Driving) d450 (Walking) d460 (Moving around in different locations) d465 (moving around using equipment) Reported code Black out Fainted Problems with orientation Decreased appetite Sleep more Problems concentrating Problems with memory Cautious Depression Embarrassment Fear and anxiety Concerns about falls No control Perception of movement See flash Vision change Bothered by noise Dizziness, imbalance, lightheadedness, nausea, spinning, and vertigo Headache Fatigue Weak legs Slowed down Reported code Debilitating Need to stop in the middle of activities Not active Problems bending over Problems looking up Problems standing Problems turning head Trouble moving head with body Need to lie down Need to sit Need to stabilize self Reduced ability to drive Problems walking Move too quickly Problems with stairs Need walker/cane D640 (Doing housework) d845 (Acquiring, keeping, and terminating a job) d740 (Formal relationships), d750 (Informal social relationships), d760 (Family relationships) d920 (Recreation and Leisure) Problems with housework Problems maintaining job Isolation Reduced ability to travel Reduced participation relative to expectations ENVIRONMENT ICF category Reported code e310 (Immediate family), e315 (Extended Need help with daily activities family), e320 (Friends), e340 (Personal care providers and personal assistants) ** Not present in the Vertigo Comprehensive Core Set ICF: International Classification of Functioning, Disability, and Health Framework