Publications by authors named "Barbara E Klein"

Article Synopsis
  • A meta-analysis of 6 population-based studies was conducted to explore the link between hypertensive retinopathy and cardiovascular risk among individuals with hypertension.
  • The study followed 11,013 participants over 5-13 years, assessing incidents of coronary heart disease (CHD), strokes, and overall cardiovascular disease (CVD).
  • Results indicated that both mild and moderate forms of hypertensive retinopathy were associated with an increased risk of CVD, particularly mild hypertensive retinopathy which heightened the risk for both CVD and CHD.
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Purpose: To investigate the relationships between optic nerve cupping and total and regional brain volumes.

Design: Secondary analysis of randomized clinical trial data.

Methods: Women 65 to 79 years of age without glaucoma with cup-to-disc ratio (CDR) measurements from the Women's Health Initiative (WHI) Sight Examination study and magnetic resonance imaging (MRI)-based total and regional brain volumes from the WHI Memory Study MRI-1 were included.

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Article Synopsis
  • The study aimed to see if a genetic risk score (GRS) for cup-to-disc ratio (CDR) affects the relationship between large CDR and cognitive function in women.
  • It's a retrospective analysis using data from the Women's Health Initiative, focusing on 1,196 White women aged about 70.
  • The findings showed that women with large CDR had significantly lower cognitive function regardless of their genetic risk score, indicating a clear association between large CDR and cognitive decline.
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Aims: The evidence relating the pupil light reflex (PLR) and cognition have been inconsistent. In this cross-sectional study, we evaluated the association between the PLR and cognition in community-dwelling middle-aged and older individuals.

Methods: Pupil reactivity was recorded in a subgroup of 403 participants (mean age 60.

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Background: Rare variants in gene coding regions likely have a greater impact on disease-related phenotypes than common variants through disruption of their encoded protein. We searched for rare variants associated with onset of ESKD in individuals with type 1 diabetes at advanced kidney disease stage.

Methods: Gene-based exome array analyses of 15,449 genes in five large incidence cohorts of individuals with type 1 diabetes and proteinuria were analyzed for survival time to ESKD, testing the top gene in a sixth cohort (=2372/1115 events all cohorts) and replicating in two retrospective case-control studies (=1072 cases, 752 controls).

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Previously, variation in retinal vascular caliber has been reported in association with chronic kidney disease (CKD) but findings remain inconsistent. To help clarify this we conducted individual participant data meta-analysis and aggregate data meta-analysis on summary estimates to evaluate cross-sectional associations between retinal vascular caliber and CKD. A systematic review was performed using Medline and EMBASE for articles published until October 2018.

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Background: The retinal microvasculature provides a window to the cerebral vasculature and enables examination of changes in retinal caliber that may mimic those occurring in cerebrovascular disease. The association of central arterial stiffness and retinal vessel caliber in a population sample is not fully understood.

Methods: In 1706 older adults (mean age 76.

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Article Synopsis
  • The study investigates the genetic factors that contribute to diabetic kidney disease using genome-wide association studies (GWAS) among individuals with type 1 diabetes, focusing on specific genetic variations that may increase risk for the condition.
  • Researchers analyzed genetic data from nearly 19,406 individuals and identified 16 significant genetic loci, with the strongest risk variant (rs55703767) linked to a mutation in the collagen type IV alpha 3 chain, which is important for kidney structure.
  • The findings suggest that these genetic variants, including the protective allele of rs55703767, could lead to new understanding and potential targets for preventing and treating diabetic kidney disease.
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Aims: Narrower retinal arterioles and wider retinal venules have been associated with macrovascular forms of cardiovascular disease (CVD). However, whether they are predictive of the development of heart failure (HF) independent of atherosclerotic CVD is unclear. We aimed to describe long-term associations of retinal vessel calibres with incident HF, in those with and without prevalent macrovascular disease, and how they relate to cardiac structure and function.

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We conducted a cross-sectional study on 403 participants in the 10-year follow-up examination of the Beaver Dam Offspring Study. The participants included 172 male and 231 female, with age ranging from 33 to 81 years (mean ± SD, 60.7 ± 9.

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Purpose: To determine if a larger cup-to-disc ratio is associated with poor cognitive function in postmenopausal women without glaucoma or ocular hypertension.

Methods: We used data from the Women's Health Initiative (WHI) hormone trial, originally designed to test effects of hormone therapy (HT) on various health outcomes. Large cup-to-disc ratio was defined as greater than 0.

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Objective: To assess associations between cognitive impairment and longitudinal changes in retinal microvasculature, over 18 years, in adults with type 1 diabetes.

Research Design And Methods: Participants of the Pittsburgh Epidemiology of Diabetes Complications Study received ≥3 fundus photographs between baseline (1986-1988) and time of cognitive assessment (2010-2015: N = 119; 52% male; mean age and type 1 diabetes duration 43 and 34 years, respectively). Central retinal arteriolar equivalent and central retinal venular equivalent were estimated via computer-based methods; overall magnitude and speed of narrowing were quantified as cumulative average and slope, respectively.

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Purpose: To test the hypothesis that retinal microvascular abnormalities known to predict other cardiovascular diseases are associated prospectively with risk of abdominal aortic aneurysm. The rationale is that aortic aneurysm involves small vessel pathology that parallels, to some degree, retinal vasculopathy.

Methods: In 1993-1995, the Atherosclerosis Risk in Communities (ARIC) Study, a prospective population-based cohort, took retinal photographs of a randomly selected eye of 10,911 ARIC participants (initial mean age 60 years).

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Importance: Whether a reported decline in the risk of developing age-related macular degeneration (AMD) continued for people born during the Baby Boom years (1946-1964) or later is unknown. These data are important to plan for ocular health care needs in the 21st century.

Objectives: To determine whether the 5-year risk for AMD declined by generation and to identify factors that contributed to improvement in risk.

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Background: The genetic etiology of human lipid quantitative traits is not fully elucidated, and interactions between variants may play a role. We performed a gene-centric interaction study for four different lipid traits: low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), total cholesterol (TC), and triglycerides (TG).

Results: Our analysis consisted of a discovery phase using a merged dataset of five different cohorts ( = 12,853 to  = 16,849 depending on lipid phenotype) and a replication phase with ten independent cohorts totaling up to 36,938 additional samples.

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Aims: To investigate whether, for a specific duration of type 1 diabetes, there is a significant change in the prevalence of proliferative diabetic retinopathy, gross proteinuria and peripheral neuropathy in those more recently diagnosed with diabetes (a period effect), in the Wisconsin Epidemiologic Study of Diabetic Retinopathy. Where present, to determine how common risk factors for diabetic complications might be associated with it, and what might be driving it.

Materials And Methods: Longitudinal cohort study with seven examination phases between 1980 and 2014.

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Purpose: To investigate the relation between sleep disruption and nuclear cataract, as well as the impact of cataract removal on sleep, in two discrete population-based cohorts.

Methods: This is a cross-sectional study of 5070 participants from three large longitudinal epidemiologic studies of age-related eye disease, hearing, olfaction, and cognition. Slit-lamp photos of the lens were obtained to grade nuclear cataract using a standardized protocol.

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Purpose: To examine the associations of nerve fiber layer (NFL) thickness with other ocular characteristics in older adults.

Methods: Participants in the Beaver Dam Eye Study (2008-2010) underwent spectral domain optical coherence tomography (SD-OCT) scans of the optic nerve head, imaging of optic discs, frequency doubling technology (FDT) perimetry, measurement of intraocular pressure (IOP), and an interview concerning their history of glaucoma and use of drops to lower eye pressure. Self-reported histories of glaucoma and the use of drops to lower eye pressure were obtained at follow-up examinations (2014-2016).

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Aims: Cardiovascular (CV) disease is a major cause of reduced life expectancy in type 1 diabetes (T1D). Intensive insulin therapy prevents CV complications but is constrained by hypoglycaemia and weight gain. Adjunct metformin reduces insulin dose requirement and stabilizes weight but there are no data on its cardiovascular effects.

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Article Synopsis
  • Retinal vessel sizes, specifically narrower arterioles and wider venules, correlate with increased risks of negative cardiovascular outcomes over a long-term follow-up period.
  • A total of 10,470 participants from the ARIC Study were analyzed, with results showing that individuals with wider venules and narrower arterioles experienced higher rates of coronary heart disease, strokes, heart failures, and deaths over an average of 16 years.
  • The findings suggest that retinal vessel caliber can improve risk assessment for cardiovascular diseases, particularly in women, by reclassifying a significant portion of those initially deemed low risk using standard prediction equations.
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Purpose: To determine the incidence and determinants of developing abnormalities on the 12-lead electrocardiogram (ECG) in persons with type 1 diabetes.

Methods: We evaluated the distribution of ECG abnormalities and risk factors for developing new abnormalities in 266 (mean age = 44 years ± 9.0; 50 % female) people with type 1 diabetes from the Wisconsin Epidemiologic Study of Diabetic Retinopathy.

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Objectives: To evaluate the associations between sensory impairments and 10-year risk of cognitive impairment.

Design: The Epidemiology of Hearing Loss Study (EHLS), a longitudinal, population-based study of aging in the Beaver Dam, Wisconsin community. Baseline examinations were conducted in 1993 and follow-up examinations have been conducted every 5 years.

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Background: Vitamin D status has been hypothesized to protect against development of diabetic retinopathy via its anti-inflammatory and anti-angiogenic properties. Additionally, in vitro and in vivo studies suggest vitamin D favorably influences blood pressure and blood glucose control, strong risk factors for diabetic retinopathy. We examined the association between vitamin D status and prevalent diabetic retinopathy in participants with diabetes from a population-based cohort.

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Background: Obstructive sleep apnea (OSA) is a common condition affecting more men than women. The relationship of OSA with microvascular disease is unclear, complicated by possible sex difference. Assessment of the relationship of OSA with retinal microvascular signs in men and women may provide insights into such a relationship.

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