A longitudinal study of cognitive trajectories in Mexican Americans age 75 and older

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Abstract

Objective: To identify distinct trajectories for global cognition, memory, and non-memory domains among Mexican American adults 75years of age and older. Methods: The final sample included 1336 participants of the Hispanic Established Population for the Epidemiologic Study of the Elderly observed during four Waves from 2004-2005 to 2012-2013. Latent class growth curve models were used to identify distinct trajectories for global cognition, memory, and non-memory. Results: Three trajectory classes were identified for global cognition, memory, and non-memory domains. Nearly 31% of the final sample maintained high global cognition (persistent high), 52.6% experienced slight decline (decline but high), and 15% experienced severe decline in global cognition (decline to low). Over 95% of participants classified in the decline to low trajectory for global cognition were also classified as decline to low for memory and non-memory. This high level of consistency for memory and non-memory domains was observed for the decline but high (97.0%) and persistent high (93.7%) trajectory classes. Conclusions: These results indicate that the majority of Mexican American older adults will experience varying degrees of cognitive decline. However, a substantial proportion of older Mexican Americans are able to maintain high cognitive functioning into advanced age despite the high prevalence of risk factors for cognitive decline in this population.

Original languageEnglish (US)
JournalInternational Journal of Geriatric Psychiatry
DOIs
StateAccepted/In press - 2016

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Cognition
Longitudinal Studies
Hispanic Americans
Population
Epidemiologic Studies
Growth
Cognitive Dysfunction

Keywords

  • Cognitive decline
  • Mexican Americans
  • Minority aging

ASJC Scopus subject areas

  • Geriatrics and Gerontology
  • Psychiatry and Mental health

Cite this

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title = "A longitudinal study of cognitive trajectories in Mexican Americans age 75 and older",
abstract = "Objective: To identify distinct trajectories for global cognition, memory, and non-memory domains among Mexican American adults 75years of age and older. Methods: The final sample included 1336 participants of the Hispanic Established Population for the Epidemiologic Study of the Elderly observed during four Waves from 2004-2005 to 2012-2013. Latent class growth curve models were used to identify distinct trajectories for global cognition, memory, and non-memory. Results: Three trajectory classes were identified for global cognition, memory, and non-memory domains. Nearly 31{\%} of the final sample maintained high global cognition (persistent high), 52.6{\%} experienced slight decline (decline but high), and 15{\%} experienced severe decline in global cognition (decline to low). Over 95{\%} of participants classified in the decline to low trajectory for global cognition were also classified as decline to low for memory and non-memory. This high level of consistency for memory and non-memory domains was observed for the decline but high (97.0{\%}) and persistent high (93.7{\%}) trajectory classes. Conclusions: These results indicate that the majority of Mexican American older adults will experience varying degrees of cognitive decline. However, a substantial proportion of older Mexican Americans are able to maintain high cognitive functioning into advanced age despite the high prevalence of risk factors for cognitive decline in this population.",
keywords = "Cognitive decline, Mexican Americans, Minority aging",
author = "Brian Downer and Chen, {Nai Wei} and Mukaila Raji and Kyriakos Markides",
year = "2016",
doi = "10.1002/gps.4575",
language = "English (US)",
journal = "International Journal of Geriatric Psychiatry",
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TY - JOUR

T1 - A longitudinal study of cognitive trajectories in Mexican Americans age 75 and older

AU - Downer, Brian

AU - Chen, Nai Wei

AU - Raji, Mukaila

AU - Markides, Kyriakos

PY - 2016

Y1 - 2016

N2 - Objective: To identify distinct trajectories for global cognition, memory, and non-memory domains among Mexican American adults 75years of age and older. Methods: The final sample included 1336 participants of the Hispanic Established Population for the Epidemiologic Study of the Elderly observed during four Waves from 2004-2005 to 2012-2013. Latent class growth curve models were used to identify distinct trajectories for global cognition, memory, and non-memory. Results: Three trajectory classes were identified for global cognition, memory, and non-memory domains. Nearly 31% of the final sample maintained high global cognition (persistent high), 52.6% experienced slight decline (decline but high), and 15% experienced severe decline in global cognition (decline to low). Over 95% of participants classified in the decline to low trajectory for global cognition were also classified as decline to low for memory and non-memory. This high level of consistency for memory and non-memory domains was observed for the decline but high (97.0%) and persistent high (93.7%) trajectory classes. Conclusions: These results indicate that the majority of Mexican American older adults will experience varying degrees of cognitive decline. However, a substantial proportion of older Mexican Americans are able to maintain high cognitive functioning into advanced age despite the high prevalence of risk factors for cognitive decline in this population.

AB - Objective: To identify distinct trajectories for global cognition, memory, and non-memory domains among Mexican American adults 75years of age and older. Methods: The final sample included 1336 participants of the Hispanic Established Population for the Epidemiologic Study of the Elderly observed during four Waves from 2004-2005 to 2012-2013. Latent class growth curve models were used to identify distinct trajectories for global cognition, memory, and non-memory. Results: Three trajectory classes were identified for global cognition, memory, and non-memory domains. Nearly 31% of the final sample maintained high global cognition (persistent high), 52.6% experienced slight decline (decline but high), and 15% experienced severe decline in global cognition (decline to low). Over 95% of participants classified in the decline to low trajectory for global cognition were also classified as decline to low for memory and non-memory. This high level of consistency for memory and non-memory domains was observed for the decline but high (97.0%) and persistent high (93.7%) trajectory classes. Conclusions: These results indicate that the majority of Mexican American older adults will experience varying degrees of cognitive decline. However, a substantial proportion of older Mexican Americans are able to maintain high cognitive functioning into advanced age despite the high prevalence of risk factors for cognitive decline in this population.

KW - Cognitive decline

KW - Mexican Americans

KW - Minority aging

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