Poster A55, Saturday, March 24, 1:30–3:30 pm, Exhibit Hall C
Memory and processing speed predict functional independence differentially in non-Hispanic and Hispanic White middle aged and older adults
Ariana Stickel1, Andrew McKinnon1, John Ruiz1, Lee Ryan1; 1University of Arizona
Although good cognitive functioning is associated with maintaining functional independence in non-Hispanic White older adults, little is known about the link between cognitive functioning and independence in Hispanics. The present study compared the relationships between cognition and functional independence in aging (50-94 years old) Hispanics (n = 85) and non-Hispanic Whites (n = 97) selected from the National Alzheimer's Coordinating Center (NACC) and Alzheimer’s Disease Neuroimaging Initiative (ADNI) databases*. Ethnic groups were matched on age, education, gender, and apolipoprotein e4 status. Functional independence was measured with the Functional Activities Questionnaire (FAQ). Neuropsychological tests included Logical Memory Long Delay and Trails A and B-A. Controlling for age and education, poorer performances on Logical Memory and Trails A were associated with lower functional independence. Further, an interaction between ethnicity and cognition indicated that slowing on Trails A was associated with lower functional independence among non-Hispanic Whites but not Hispanics. Trails B-A was not predictive of FAQ. These results suggest that associations between cognition and functional independence are not uniform across ethnic groups. Although memory may be a more generalizable predictor of functional independence, processing speed is not. *Funded by NIA/NIH Grant U01 AG016976 (NACC) and NIH U01 AG024904 and DOD W81XWH-12-2-0012 (ADNI).
Topic Area: LONG-TERM MEMORY: Development & aging