Table 1.

Prevalence of etiologies across severity of speech impairment.

Etiology	Severity
	Mild (n = 5)	Moderate (n = 11)	Severe (n = 11)	Total
Amyotrophic lateral sclerosis	2	5	4	11
Anoxic brain injury		1		1
Ataxia		1		1
Cerebral palsy	1	2	2	5
Childhood-onset apraxia of speech		1		1
Cleft lip and palate			1	1
Down syndrome	1			1
Hearing impairment	1			1
Multiple sclerosis		1		1
Muscular dystrophy			1	1
Stroke		1		1
Vocal fold paralysis			2	2