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Potential drivers of increased costs in Lewy body dementia (LBD), in comparison to Alzheimer's disease, were tested.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>3,001,987 Medicare beneficiaries were identified, of which 8.2% had a dementia diagnosis. Unspecified dementia was the most common diagnostic category (59.6%), followed by Alzheimer's disease (23.2%). LBD was the costliest subtype to Medicare, on average, followed by vascular dementia. The higher costs in LBD were explained in part by falls, urinary incontinence or infection, depression, anxiety, dehydration, and delirium.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>Dementia subtype is an important predictor of health care costs. Earlier identification and targeted treatment might mitigate the costs associated with co\u2010occurring conditions in LBD.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.jalz.2019.03.015","type":"journal-article","created":{"date-parts":[[2019,6,4]],"date-time":"2019-06-04T12:03:08Z","timestamp":1559649788000},"page":"899-906","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":54,"title":["The costs of dementia subtypes to California Medicare fee\u2010for\u2010service, 2015"],"prefix":"10.1002","volume":"15","author":[{"given":"Yingjia","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Neurology Memory and Aging Center University of California San Francisco San Francisco CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leslie","family":"Wilson","sequence":"additional","affiliation":[{"name":"Department of Clinical Pharmacy University of California, San Francisco San Francisco CA USA"},{"name":"Department of Medicine University of California, San Francisco San Francisco CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Kornak","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Biostatistics University of California, San Francisco San Francisco CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. 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