CJD appears to affect males and females in equal numbers. It usually first appears in mid-life, beginning between ages 20 and 68, with the average age at onset of symptoms being around age 50.
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Alpers' disease is a rare disorder. Due to complications related to the diagnosis of Alpers' disease, it is difficult to estimate how often it occurs in the population. Both genders are affected with equal frequency.
Although Binswanger disease may occur in younger groups, the symptoms usually become pronounced in patients over 60 years of age.
Refsum disease is an extremely rare disorder that affects males and females with equal frequency. It has been observed in Norwegian populations as well as others.
The risk of developing Alzheimer disease increases with age and is independent of sex or geographical location (although there are environmental toxic agents that can impair various cognitive functions.
Sturge-Weber syndrome is a sporadic disease that is found throughout the world, affecting males and females equally.
The condition affects people of all ethnic groups worldwide, with an equal proportion of males and females.
Demographics
What are the demographics of albinism:
Batten disease is relatively rare, occurring in two to four of every 100,000 births in the United States. NCLs appear to be more common in children living in Northern Europe and Newfoundland, Canada.
International Demographics was created in 1971.