Table 3.

Concordance in dementia incidence and by race 2000–2008 (N = 9623)

Concordance category	All	Whites	Blacks	Hispanics
No incident dementia, both measure, %	79.1	81.4	68.2	69.3
Incident dementia, both measure, %	3.4	3.1	5.6	3.5
Incident dementia, cognitive test only, %	5.2	3.2	15.2	13.2
Incident dementia, diagnosis only, %	12.2	12.3	11.1	13.9
Concordance in incident dementia, %	82.5	84.5	73.8	72.9
N	9623	7883	1201	538

NOTE: Agreement is defined as having incident dementia by both measures, during a 4-year time window (i.e., 2 years backward and 2 years forward). Dementia based on cognitive test requires evidence of continued cognitive impairment in the next consecutive Health and Retirement Study (HRS) wave or death before the next wave. Dementia diagnosis ascertained by Medicare claims requires observing a second diagnosis or death as of December 31, 2008, as verification. This sample excludes respondents with incident dementia based on HRS before wave 5 (i.e., year 2000) given time horizon of this study and excludes those with incident dementia based on HRS at wave 9 (i.e., year 2008) due to availability of linked claims data up to December 31, 2008.