Table 1.

Collective epidemiology of childhood dementia disorders in high and upper-middle income countries

Epidemiological outcome	Incidence per 100 000 births	Life expectancy average (years)a	Prevalence per 100 000 population	Prevalence per 100 000 children
All childhood dementia	84.3	55.7	28.7	58.3
Treatable childhood dementiab	49.8	83.0	23.4	41.8
Currently non-treatable childhood dementia	34.5	16.3	5.3	16.5

Mean calculated from the life expectancies of each individual condition (Supplementary Tables 1 and 2) and weighted by their incidence. Note that a median life expectancy of 9 years was also calculated using survival curves for the currently non-treatable childhood dementia conditions.

Life expectancy similar to the general population with treatment, assuming early diagnosis and treatment compliance.