| Summary: | The global incidence of dementia has been rising for the past several years, posing significant health challenges regarding its management and prevention. Dementia is associated with a substantial burden on patients and their families. Therefore, effective, evidence-based preventive strategies are required for dementia. To achieve this, the predisposing factors for dementia and their relationship with other diseases need to be determined. Japan has a universal health insurance system and these data have been stored in their respective databases since 2008. Herein we explored the influence of clinical history on the occurrence of dementia based on data collected by the National Health Insurance in Japan and Municipal Care Certification Survey over the past 10 years. Multivariate logistic regression analysis was used to determine the factors from clinical history that affect the risk of dementia development. A significant odds ratio was observed for the development of dementia in 5-year data, involving the clinical history of osteoporosis, depression, internal carotid artery occlusion, schizophrenia, and Parkinson’s disease. In addition, a significant odds ratio was observed for the development of dementia in 10-year data, involving the clinical history of osteoporosis, cataracts, and schizophrenia.
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