Table 1. Estimated potential smart wheelchairs users, organised by diagnosis, in the EU.

Diagnosis	Prevalence (millions) (Lower–upper)	% who need wheelchair (Lower–upper)	Symptoms	% with symptoms (Lower–upper)
Alzheimer disease	3.6–6.4	10–20	Attention, agitation, and impulse control Executive reasoning	45–52 35–45
Amyotrophic lateral sclerosis	0.04–0.05	46–80	Fatigue/weakness Head/neck movement	20–26 20–26
Cerebral palsy	1.1–1.3	80–90	Spasticity Tremor Hemiplegia Ataxia Dystonia Executive reasoning	70–90 10–20 10–20 5–10 15–20 30–40
Multiple sclerosis	0.4–0.6	65–75	Spasticity Tremor Fatigue/weakness Head/neck movement Ataxia Executive reasoning	65–90 5–7 43–90 43–90 23–84 30–70
Parkinson disease	1.4–1.6	5–15	Visual field neglect Tremor Bradykinesia Executive reasoning	85–95 60–65 10–15 25–45
Traumatic brain injury	4.6–5	15–25	Visual field neglect Visual field loss Spasticity Hemiplegia Tremor Bradykinesia Fatigue/weakness Head/neck movement Attention, agitation, and impulse control Executive reasoning	20–80 15–25 35–50 45–50 20–30 20–25 35–50 35–50 20–60 50–60