Table 1.

Frequency of young-onset dementia in specialized clinics

Study/year	Location	Study population	Case ascertainment	YOD/total	% YOD
Yokota et al., 2005	Okayama, Japan	Outpatient clinic	Referrals from generalists, neurologists, and psychiatrists	34/464	7.3
McMurtray et al., 2006	Los Angeles, USA	Memory center	Medical records	278/1683	30
Shinagawa et al., 2007	Ehime, Japan	Memory clinic	Referrals from generalists, geriatricians, and neuropsychiatrists	185/861	27.7
Nandi et al., 2008	West Bengal, India	Specialized clinic	Medical records	94/379	24.5
Papageorgiou et al., 2009	Athens, Greece	Specialized center	Referrals from neurologists and psychiatrists	114/260	44
Picard et al., 2011	Amiens, Lille, and Rouen, France	Cohort of 3 memory clinics	Referrals	811/3473	23.5
Croisile et al., 2012	Lyons, France	Memory clinic	Referrals	91/746	12.2