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Using data from the Korean National Disability Registry and National Health Insurance Service, individuals over 40 who underwent health examinations in 2009 were followed until 2020. Cox proportional hazards models estimated hazard ratios (HRs) for dementia outcomes, adjusting for confounders. Over a mean 8-year follow-up, 161 dementia, 111 AD, and 22 VaD cases occurred among individuals with intellectual disabilities. Adjusted HRs for all-cause dementia, AD, and VaD were 5.75, 5.23, and 4.66, respectively, compared to those without intellectual disabilities. The risk was especially elevated among those aged 40\u201364 years (P for interaction &lt;0.01). In conclusion, individuals with intellectual disabilities have a significantly higher risk of dementia, particularly at younger ages, highlighting the need for increased awareness and targeted healthcare strategies.<\/jats:p>","DOI":"10.1177\/17446295261476476","type":"journal-article","created":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T04:05:57Z","timestamp":1786421157000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Intellectual disabilities and risk of dementia: A Korean population-based cohort study"],"prefix":"10.1177","author":[{"given":"Yoo Jin","family":"Um","sequence":"first","affiliation":[{"name":"Department of Medical Education,Hanyang University College of Medicine, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6240-9026","authenticated-orcid":false,"given":"In Young","family":"Cho","sequence":"additional","affiliation":[{"name":"Sungkyunkwan University School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hye Yeon","family":"Koo","sequence":"additional","affiliation":[{"name":"Seoul National University Bundang Hospital"},{"name":"Seoul National University College of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong-Moon Mark","family":"Park","sequence":"additional","affiliation":[{"name":"University of Arkansas for Medical Sciences"},{"name":"University of Arkansas for Medical Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyung Mee","family":"Kim","sequence":"additional","affiliation":[{"name":"Soongsil University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chung Eun","family":"Lee","sequence":"additional","affiliation":[{"name":"Sungkyunkwan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyungdo","family":"Han","sequence":"additional","affiliation":[{"name":"Soongsil University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,8,10]]},"reference":[{"key":"e_1_3_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1550-8579(07)80026-X"},{"key":"e_1_3_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jstrokecerebrovasdis.2021.105864"},{"key":"e_1_3_7_4_1","doi-asserted-by":"publisher","DOI":"10.3233\/JAD-191092"},{"key":"e_1_3_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ridd.2009.10.015"},{"key":"e_1_3_7_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dhjo.2024.101754"},{"key":"e_1_3_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2468-2667(21)00249-8"},{"key":"e_1_3_7_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1468-3148.2005.00239.x"},{"key":"e_1_3_7_9_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamaneurol.2021.2161"},{"key":"e_1_3_7_10_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamaneurol.2023.4929"},{"key":"e_1_3_7_11_1","doi-asserted-by":"publisher","DOI":"10.3389\/fnagi.2023.1126587"},{"key":"e_1_3_7_12_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13195-025-01708-8"},{"key":"e_1_3_7_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/ddrr.1126"},{"key":"e_1_3_7_14_1","doi-asserted-by":"publisher","DOI":"10.1093\/ije\/dyae163"},{"key":"e_1_3_7_15_1","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0000000000213599"},{"key":"e_1_3_7_16_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13195-018-0442-3"},{"key":"e_1_3_7_17_1","doi-asserted-by":"publisher","DOI":"10.3389\/fnagi.2022.937486"},{"key":"e_1_3_7_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ridd.2013.12.015"},{"key":"e_1_3_7_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(24)01296-0"},{"key":"e_1_3_7_20_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamaneurol.2022.3543"},{"key":"e_1_3_7_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/jnr.24802"},{"key":"e_1_3_7_22_1","doi-asserted-by":"publisher","DOI":"10.1111\/jir.12390"},{"key":"e_1_3_7_23_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0038268"},{"key":"e_1_3_7_24_1","unstructured":"Ministry of Data and Statistics (2026) Statistical Geographic Information Service. 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