We linked fee-for-service Medicare claims to participants aged ≥70 from the nationally representative Health and Retirement Study.  We classified dementia status using an algorithm with similar sensitivity and specificity across racial/ethnic groups and assigned clinical dementia diagnosis status using ICD-9-CM codes from Medicare claims. 
Medicare
We classified dementia status using an algorithm with similar sensitivity and specificity across racial/ethnic groups and assigned clinical dementia diagnosis status using ICD-9-CM codes from Medicare claims. 
ICD-9-CM