Table 5.

Observed and expected rates and detection rates for MCI and dementia by dual eligibility status and coverage type, 2017 to 2019

	Dually eligiblea	Medicare only	Fee-for-service	Medicare Advantage
Included beneficiaries	5,102,819	36,102,655	22,957,446	18,248,028
MCI
Observed rate	0.017	0.015	0.016	0.015
Expected rate	0.308	0.180	0.186	0.207
Detection rateb	0.056	0.085	0.084	0.073
Dementia
Observed rate	0.213	0.079	0.096	0.095
Expected rate	0.250	0.063	0.082	0.092
Detection rateb	0.855	1.243	1.167	1.034

MCI Mild cognitive impairment

^aDually eligible for Medicare and Medicaid

^bThe detection rate is the ratio of the observed to the expected rate, where the expected rate is computed based on a predictive model