{"id":28583,"date":"2025-08-10T04:59:00","date_gmt":"2025-08-09T20:59:00","guid":{"rendered":"https:\/\/csccm.org.cn\/?p=28583"},"modified":"2025-08-10T13:06:59","modified_gmt":"2025-08-10T05:06:59","slug":"bmj%e5%8f%91%e8%a1%a8%e8%ae%ba%e6%96%87%ef%bc%9a2015%e5%b9%b4%e8%87%b32021%e5%b9%b4%e9%97%b4%e7%be%8e%e5%9b%bdmedicare%e5%8f%97%e7%9b%8a%e4%ba%ba%e7%97%b4%e5%91%86%e7%9a%84%e5%8f%91%e7%94%9f","status":"publish","type":"post","link":"https:\/\/csccm.org.cn\/?p=28583","title":{"rendered":"[BMJ\u53d1\u8868\u8bba\u6587]\uff1a2015\u5e74\u81f32021\u5e74\u95f4\u7f8e\u56fdMedicare\u53d7\u76ca\u4eba\u75f4\u5446\u7684\u53d1\u751f\u7387"},"content":{"rendered":"\n

Research<\/strong><\/p>\n\n\n\n

Incidence and prevalence of dementia among US Medicare beneficiaries, 2015-21: population based study<\/h1>\n\n\n\n

Beau Blass, Cassie B Ford, Samir Soneji, et al<\/h3>\n\n\n\n

BMJ<\/em> 2025; 389 doi: https:\/\/doi.org\/10.1136\/bmj-2024-083034<\/a> (Published 20 May 2025)Cite this as: BMJ<\/em> 2025;389:e083034<\/h3>\n\n\n\n

Abstract<\/h2>\n\n\n\n

Objective<\/strong> To determine the incidence and prevalence of dementia in a nationally representative cohort of US Medicare beneficiaries, stratified by important subgroups.<\/p>\n\n\n\n

Design<\/strong> Population based study.<\/p>\n\n\n\n

Setting<\/strong> Nationwide study between 2015 and 2021.<\/p>\n\n\n\n

Participants<\/strong> Fee-for-service Medicare beneficiaries aged 66 or older with at least one year of continuous enrollment.<\/p>\n\n\n\n

Main outcome measures<\/strong> Incidence and prevalence of dementia, calculated as percentage per person years or percentage of beneficiaries respectively. These metrics were also calculated in key subgroups defined by age, sex, race\/ethnicity, and neighborhood socioeconomic status.<\/p>\n\n\n\n

Results<\/strong>\u00a0A total of 5\u2009025\u2009039 incident cases of dementia were documented from 2015 to 2021. The overall age and sex standardized incidence decreased between 2015 and 2021 from 3.5% to 2.8%. Prevalence increased during this time from 10.5% to 11.8%. Male beneficiaries had a higher age standardized incidence than did female beneficiaries in 2015 (3.5%\u00a0v<\/em>\u00a03.4%), a difference that widened by 2021 (2.9%\u00a0v<\/em>\u00a02.6%; estimated difference-in-difference 0.94, 95% confidence interval (CI) 0.94 to 0.95; P<0.001). Incidence was highest in 2015 for black beneficiaries (4.2%), followed by Hispanic beneficiaries (3.7%) and white beneficiaries (3.4%), and in 2021 for black beneficiaries (3.1%) followed by white beneficiaries (2.8%) and Hispanic beneficiaries (2.6%); the difference between white and black beneficiaries narrowed from 2015 to 2021 (difference-in-difference 0.92, 95% CI 0.91 to 0.93; P<0.001) as did the difference between white and Hispanic beneficiaries (difference-in-difference 0.88, 0.87 to 0.89; P<0.001).<\/p>\n\n\n\n

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Conclusions<\/strong> The incidence of dementia decreased from 2015 to 2021, but the prevalence increased. Disparities in these measures by race\/ethnicity, sex, and neighborhood socioeconomic status should motivate future measures to promote health equity.<\/p>\n","protected":false},"excerpt":{"rendered":"

Research Incidence and prevalence of dementia among US […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[32,23],"tags":[],"_links":{"self":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/28583"}],"collection":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28583"}],"version-history":[{"count":2,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/28583\/revisions"}],"predecessor-version":[{"id":28894,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/28583\/revisions\/28894"}],"wp:attachment":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}