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Measuring Alzheimer's Disease and Other Dementias in Diverse Populations Using Medicare Claims Data
Johanna Thunell1, Patricia Ferido1, Julie Zissimopoulos1,2
1USC Schaeffer Center for Health Policy and Economics, Los Angeles, CA, USA.
Abstract:
We examined how methods used for identifying dementia in administrative claims affected dementia incidence across racial/ethnic populations using a 100% sample of Medicare beneficiaries (n = 23,793,452). We found levels differed by method from 3.1% annual incidence to 3.6% in 2014. Dementia incidence declined from 2007 to 2014, but choice of method differentially impacted levels and trends by race/ethnicity. Methods using codes for dementia diagnosis and drugs to treat symptoms identified proportionally more Hispanics and Asians with dementia than other race/ethnicities, while codes for dementia diagnosis, drugs, and symptoms identified proportionally more whites and American Indians/Alaska Natives with dementia than other race/ethnicities.
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