Table 1.

Examples of Health Conditions That Have a High Prevalence Among People Who Have Been Deaf Since Birth

Medical Condition	Prevalence, General Population	Prevalence, People Deaf Since Birthc	Difference
Hereditary long Q-T syndrome	1 in 5,000a	3 in 1,000	15 times higher
Retinitis pigmentosa	1 in 4,000b	3%-10%	120-400 times higher

^a Source: Goldenberg and Moss (18).

^b Source: National Library of Medicine (19).

^c Source: Barnett et al (20).