Publications by authors named "Amanda M Fretts"

Objective: To develop and evaluate an alternative strengths-based and culturally-informed screener for food security among American Indian respondents.

Design: Two-phase mixed methods sequential exploratory study with a qualitative phase followed by a quantitative phase.

Setting: Northern Navajo Medical Center.

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Importance: Identifying factors associated with resilience during the COVID-19 pandemic can inform targeted interventions and resource allocation for groups disproportionately affected by systemic inequities.

Objective: To examine factors associated with self-reported resilience during the COVID-19 pandemic in racially and ethnically diverse, community-dwelling US adults.

Design, Setting, And Participants: This cross-sectional study was conducted as part of the Collaborative Cohort of Cohorts for COVID-19 Research (C4R) study, which assessed the associations of the pandemic with self-reported resilience of participants from 14 established US prospective cohorts since January 2021.

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Serum lipid levels, which are influenced by both genetic and environmental factors, are key determinants of cardiometabolic health and are influenced by both genetic and environmental factors. Improving our understanding of their underlying biological mechanisms can have important public health and therapeutic implications. Although psychosocial factors, including depression, anxiety, and perceived social support, are associated with serum lipid levels, it is unknown if they modify the effect of genetic loci that influence lipids.

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Background: Environmental metals are recognized cardiovascular disease risk factors, yet the role of metal exposure in heart failure (HF) risk remains understudied.

Objectives: This study aims to evaluate the prospective association of urinary metals with incident HF across 3 geographically and ethnically/racially diverse cohorts: MESA (Multi-Ethnic Study of Atherosclerosis) and SHS (Strong Heart Study) in the United States, and the Hortega Study in Spain.

Methods: Adults 18-85 years of age in MESA (n = 6,601), SHS (n = 2,917), and Hortega (n = 1,300) were followed up to 20 years.

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Background: Evidence on lead and the burden of cardiovascular disease (CVD) derived from National Health and Nutrition Examination Survey (NHANES) data, a general sample of the U.S. population, lacks sufficient representation of American Indians.

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Background: Ultra-processed food (UPF) consumption is associated with adverse health outcomes. Plant- and animal-sourced UPFs have a unique nutritional composition to improve palatability, which may impact health, but evidence is limited.

Objectives: The objective of this study was to investigate the association between UPF intake, plant- and animal-sourced UPF, and mortality outcomes in older adults.

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Introduction: Uranium is common in drinking water, soil, and dust in American Indian communities. Hypertension is a cardiovascular risk factor affecting American Indians. We evaluated the association between uranium exposure and incident hypertension and changes in blood pressure among Strong Heart Family Study participants.

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Objective: To identify lipidomic markers of habitual unprocessed red meat and processed meat intake and evaluate their associations with diabetes risk in American Indians.

Research Design And Methods: We studied 1,816 participants from the Strong Heart Family Study. Using untargeted liquid chromatography-mass spectrometry, we quantified 1,542 lipids (518 known) in fasting plasma at baseline and follow-up (∼5 years apart).

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Introduction: We aimed to describe the prevalence of vitamin D deficiency among American Indian adolescents and determine its association with cardiovascular disease (CVD) risk factors.

Methods: Our study population consisted of 307 adolescents (aged ≤20 years) participating in the Strong Heart Family Study with serum 25-hydroxyvitamin D (25[OH]D) measured on samples collected during baseline examinations (2001-2003). We defined baseline prevalence of vitamin D deficiency as 25(OH)D ≤20 ng/mL.

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Background: Gene-environment interactions may enhance our understanding of hypertension. Our previous study highlighted the importance of considering psychosocial factors in gene discovery for blood pressure (BP) but was limited in statistical power and population diversity. To address these challenges, we conducted a multi-population genome-wide association study (GWAS) of BP accounting for gene-depressive symptomatology (DEPR) interactions in a larger and more diverse sample.

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Introduction: Compared with White Americans, American Indian adults have disproportionately high depression rates. Previous studies in non-American Indian populations report depression as common among people with uncontrolled hypertension, potentially interfering with blood pressure control. Few studies have examined the association of depressive symptoms with hypertension development among American Indians despite that population's high burden of depression and hypertension.

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Article Synopsis
  • Coronary heart disease (CHD) is a major health issue in the U.S., and improved prediction models could help in early detection and intervention.
  • Researchers developed a deep learning autoencoder survival analysis model (AESurv) that analyzes DNA methylation and clinical data to predict CHD events more accurately.
  • The AESurv model outperformed traditional survival analysis models in two studies, showing strong potential for improving early CHD prediction and aiding healthcare professionals in managing patient care.
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  • A study was conducted on heart failure (HF) risk factors among American Indian communities, revealing a lack of existing research in this area despite high diabetes and cardiovascular issues.
  • The study analyzed data from 3,059 participants, identifying key predictors of HF over time, including age, smoking, kidney damage, and history of heart attacks, with strong predictive performance indicated.
  • The findings highlight that diabetes control and kidney damage indicators are significant in determining HF risks, which could help improve risk prediction and management in these communities.
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  • Selenium is a crucial nutrient that can have negative health effects at both low and high levels, prompting research into how it affects DNA methylation and related diseases in a specific population (American Indians).
  • In a study involving 1,357 participants, researchers measured urinary selenium levels and conducted DNA methylation analysis, identifying five key CpG sites significantly associated with these levels.
  • The results showed only minor changes in DNA methylation linked to urinary selenium, indicating that its health impacts might involve mechanisms beyond just DNA methylation alterations.
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Background: Growing evidence indicates that trimethylamine -oxide, a gut microbial metabolite of dietary choline and carnitine, promotes both cardiovascular disease and chronic kidney disease risk. It remains unclear how circulating concentrations of trimethylamine -oxide and its related dietary and gut microbe-derived metabolites (choline, betaine, carnitine, γ-butyrobetaine, and crotonobetaine) affect incident heart failure (HF).

Methods: We evaluated 11 768 participants from the Cardiovascular Health Study and the Multi-Ethnic Study of Atherosclerosis with serial measures of metabolites.

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  • AI communities experience uranium exposure from abandoned mines and contaminated water, but dietary impacts are under-researched.
  • The study assessed urinary uranium levels among American Indians from different regions, finding geographical variations and specific dietary factors influencing uranium levels in urine.
  • Results showed higher uranium levels were linked to organ meat and cereals, particularly in North Dakota and South Dakota, while some foods like fries and chips were associated with lower levels; dietary factors accounted for just 1.71% of variability in urinary uranium.
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Background: A growing body of research indicates that associations of ceramides and sphingomyelins with mortality depend on the chain length of the fatty acid acylated to the backbone sphingoid base. We examined associations of 8 ceramide and sphingomyelin species with mortality among an American Indian population.

Methods And Results: The analysis comprised 2688 participants from the SHFS (Strong Heart Family Study).

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  • The study explored the link between arsenic levels in community water systems and private wells and the incidence of type 2 diabetes (T2D) among participants in two major studies: the Strong Heart Family Study (SHFS) and the Multi-Ethnic Study of Atherosclerosis (MESA).
  • A total of 7,568 participants (1,791 from SHFS and 5,777 from MESA) without T2D at baseline were monitored for new cases, finding a higher incidence of T2D associated with increased arsenic levels in the water supplies, particularly among certain demographics.
  • Results indicated that even low to moderate levels of arsenic in drinking water (<10 µ
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The generalized estimating equations method (GEE) is commonly applied to analyze data obtained from family studies. GEE is well known for its robustness on misspecification of correlation structure. However, the unbalanced distribution of family sizes and complicated genetic relatedness structure within each family may challenge GEE performance.

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Background: Cardiovascular disease (CVD) is a leading cause of morbidity and mortality in American Indian people. In 2022, the American Heart Association developed the Life's Essential 8 goals to promote cardiovascular health (CVH) for Americans, composed of diet, physical activity, nicotine exposure, sleep, body mass index, blood lipids, blood pressure, and blood glucose. We examined whether achievement of Life's Essential 8 goals was associated with incident CVD among SHFS (Strong Heart Family Study) participants.

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Background: Although many studies on the association between dyslipidemia and cardiovascular disease (CVD) exist in older adults, data on the association among adolescents and young adults living with disproportionate burden of cardiometabolic disorders are scarce.

Methods And Results: The SHFS (Strong Heart Family Study) is a multicenter, family-based, prospective cohort study of CVD in an American Indian populations, including 12 communities in central Arizona, southwestern Oklahoma, and the Dakotas. We evaluated SHFS participants, who were 15 to 39 years old at the baseline examination in 2001 to 2003 (n=1440).

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Objectives: To describe the social drivers of health and health status of Native Hawaiian and Pacific Islander (NHPI) youth in the US.

Methods: This is a cross-sectional analysis of the 2014 NHPI National Health Interview Survey (NHIS) which surveyed about 3,000 NHPI households, including 1,428 NHPI youth (884 0-12 yo, 421 13-17 yo, and 123 18-21 yo). We described domains of social drivers of health (SDoH), health conditions, and associations of income and food insecurity with body mass index (BMI) for NHPI youth.

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