Prevalence and subtype distribution of early‐onset dementia in Japan

• DOI: 10.1111/psyg.12596
• Publication Date: 2020-08-28T10:02:01Z
• Authors: Shuichi Awata; Ayako Edahiro; Tetsuaki Arai; Manabu Ikeda; Takeshi Ikeuchi; Shinobu Kawakatsu; Yoko Konagaya; Kazuo Miyanaga; Hidetaka Ota; Kyoko Suzuki; Satoshi Tanimukai; Kumiko Utsumi; Tatsuyuki Kakuma
• Keywords: Vascular dementia

Aim People living with early‐onset dementia (EOD) have specific social needs. Epidemiological studies are needed to obtain current information and provide appropriate service planning. This study aimed clarify the prevalence subtype distribution of EOD, as well services frequently used by individuals EOD. Methods A multisite, population‐based, two‐step was conducted. Questionnaires were sent 26 416 candidate facilities in 12 areas a target population 11 630 322 inquire whether any EOD had sought or stayed during last months (step 1). When “yes” responses received, additional questionnaires both complete distribute more detailed information, including 2). Results In step 1, valid obtained from 16 848 (63.8%), 4077 cases identified. 2, for 1614 (39.6%) 530 (13.0%) individuals. The national rate estimated be 50.9/100 000 at risk (95% confidence interval: 43.9–57.9; age range, 18–64 years). number 35 700 2018. Alzheimer‐type (52.6%) most frequent subtype, followed vascular (17.1%), frontotemporal (9.4%), due traumatic brain injury (4.2%), Lewy bodies/Parkinson's disease (4.1%), alcohol‐related disorders (2.8%). Individuals identified medical centers dementia. Conclusion this comparable those previous Japan. However, differed, being prominent. Based on case identification frequencies, expected continue function primary special health providing quality diagnosis post‐diagnostic support