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Table 4 Average and median estimates of the Canadian prevalence for various neurological conditions

From: Clinician awareness of brain computer interfaces: a Canadian national survey

 Quadriplegic CP with preserved cognition (n = 55)Severe hemiplegic CP (n = 48)Hemiplegia resulting from adult stroke (n = 58)Spinal cord injury (High cervical or thoracic injury) (n = 70)ALS or similar (Loss of all motor control) (n = 51)Spinal muscular atrophy or Severe muscular dystrophy or similar (n = 57)Brainstem stroke (Locked-in syndrome/ quadriplegia) (n = 65)Total
Average Prevalence (95% CI*)5.4 per 100,000 (3.5–7.3)10.4 per 100,000 (6.6–14.2)50.9 per 100,000 (31.6–70.1)12.9 per 100,000 (8.6–17.1)4.1 per 100,000 (2.8–5.4)3.1 per 100,000 (2.1–4.0)0.7 per 100,000 (0.5–1.0)-
Average Prevalence x CAD pop.** (× 103)
(95% CI*)
1.9 (1.3–2.7)3.8 (2.4–5.2)18.6 (11.6–25.7)4.7 (3.1–6.3)1.6 (1.0–2.0)1.1 (0.8–1.5)0.3 (0.2–0.4)32 (20.4–43.8)
Median Prevalence (95% CI*)2.5 per 100,000 (1–4)5 per 100,000 (2–10)20 per 100,000 (10–30)4.5 per 100,000 (2–10)2.5 per 100,000 (1.5–5)1.5 per 100,000 (1–2.5)0.3 per 100,000 (0.2–0.5)-
Median Prevalence x CAD pop.** (×103)
(95% CI*)
0.9 (0.4–1.5)1.8 (0.7–3.7)7.3 (3.7–11.0)1.7 (0.7–3.7)9.2 (0.6–1.8)0.6 (0.4–0.9)0.1 (0.1–1.8)13 (6.5–22.8)
  1. Legend: *Data is not normally distributed but confidence intervals for mean calculated as if normality exists. Note that extreme outliers (3 times the interquartile range above the 3rd quartile) were excluded from the analysis. **Canadian population (CAD pop.) estimated at 36,700,000 based on Statistics Canada’s estimate on July 1, 2017 [23]