Expected and diagnosed rates of mild cognitive impairment and dementia in the U.S. Medicare population: observational analysis

Table 5 Observed and expected rates and detection rates for MCI and dementia by dual eligibility status and coverage type, 2017 to 2019

	Dually eligible^a	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 rate^b	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 rate^b	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

ISSN: 1758-9193