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Apolipoprotein E ε4 Allele-Based Differences in Brain Volumes Are Largely Uniform Across Late Middle Aged and Older Hispanic/Latino- and Non-Hispanic/Latino Whites Without Dementia.

ABSTRACT: Hispanics/Latinos are at an equal or a greater risk for Alzheimer's disease (AD), yet risk factors remain more poorly characterized as compared to non-Hispanic/Latino Whites. Among non-Hispanic/Latino White cohorts, the apolipoprotein E (APOE) ε4 allele is one of the strongest risk factors for AD with subtle declines in episodic memory and brain volumes detectable in the preclinical stages. We examined whether the APOE ε4 status had a differential impact on cognition and brain volumes among cognitively healthy and mild cognitively impaired Hispanics/Latinos (n = 86; ε4 n = 23) compared to a well-matched group of non-Hispanic/Latino Whites (n = 92; ε4 n = 29). Neither the APOE ε4 status nor the interaction between the ε4 status and ethnicity was associated with cognitive performance. The APOE ε4 status was associated with white matter and not with gray matter volumes. APOE ε4 carriers had a significantly smaller total brain white matter volumes, as well as smaller right middle temporal and left superior temporal volumes. The Hispanics/Latinos had significantly smaller left middle frontal gray matter volumes, yet marginally larger overall white matter volumes, than the non-Hispanic/Latino Whites. Exploratory analysis within the Hispanic/Latino sample found that those people whose primary language was Spanish had larger total brain white matter volumes compared primarily to the English speakers. Importantly, primary language differences only held for Hispanic/Latino ε4 carriers and did not differentiate Hispanic/Latino non-carriers, underscoring the need for further investigation into the impacts of language and acculturation on cognitive aging among the fastest growing ethnic minority group in the United States.

SUBMITTER: Stickel AM

PROVIDER: S-EPMC7952627 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Introduction:Although California is home to the largest Hispanic/Latino population, few studies have compared smoking behavior trends of Hispanic/Latino nationality groups in California to the remaining United States, which may identify the impact of the states antitobacco efforts on these groups. This study compared smoking status, frequency, and intensity among Mexican Americans, Central/South Americans, and non-Hispanic Whites in California to the remaining United States in the 1990s and 2000s. Methods:Data were analyzed using the 1992-2011 Current Population Survey Tobacco Use Supplement to report the estimated prevalence of smoking status, frequency, and intensity by decade, race/ethnicity, and state residence. Weighted logistic regression explored sociodemographic factors associated with never and heavy smoking (?20 cigarettes per day). Results:There were absolute overall increases from 6.8% to 9.6% in never smoking across all groups. Compared to the remaining United States, there was a greater decrease in heavy smoking among Mexican American current smokers in California (5.1%) and a greater increase in light and intermittent smokers among Central/South American current smokers in California (9.3%) between decades. Compared to those living in the remaining United States, smokers living in California had lower odds of heavy smoking (1990s: odds ratio [OR] = 0.64, 95% confidence interval [CI] = 0.62, 0.66; 2000s: 0.54, 95% CI = 0.52, 0.55). Conclusions:California state residence significantly impacted smoking behaviors as indicated by significant differences in smoking intensity between California and the remaining United States among Hispanic/Latino nationality groups. Understanding smoking behaviors across Hispanic/Latino nationality groups in California and the United States can inform tobacco control and smoking prevention strategies for these groups. Implications:The present study explored the differences in smoking behaviors between Whites, Mexican Americans, and Central South/Americans living in California versus the rest of the United States in the 1990s and the 2000s. The results contribute to our current knowledge as there have been minimal efforts to provide disaggregated cigarette consumption information among Hispanic/Latino nationality groups. Additionally, by comparing cigarette consumption between those in California and the remaining United States, our data may provide insight into the impact of California's antitobacco efforts in reaching Hispanic/Latino subpopulations relative to the remaining US states, many of which have had less tobacco control policy implementation.

Dataset Information

Apolipoprotein E ε4 Allele-Based Differences in Brain Volumes Are Largely Uniform Across Late Middle Aged and Older Hispanic/Latino- and Non-Hispanic/Latino Whites Without Dementia.

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