Publications by authors named "Carson A"

It is established that patients hospitalised with COVID-19 often have ongoing morbidity affecting activity of daily living (ADL), employment, and mental health. However, little is known about the relative outcomes in patients with COVID-19 neurological or psychiatric complications. We conducted a UK multicentre case-control study of patients hospitalised with COVID-19 (controls) and those who developed COVID-19 associated acute neurological or psychiatric complications (cases).

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Despite considerable advances in identifying risk factors for obesity development, there remains substantial gaps in our knowledge about its etiology. Variation in obesity (defined by BMI) is thought to be due in part to heritable factors; however, obesity-associated genetic variants only account for a small portion of heritability. Epigenetic regulation, defined by genetic and/or environmental factors with changes in gene expression, may account for some of this "missing heritability".

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Introduction: Black nurses are under-represented in the Canadian nursing workforce. A legacy of discrimination and systemic barriers reinforce the under-representation of Black nurses in the nursing workforce throughout the health system.

Objective: The objective of this study was to identify and describe organizational initiatives for the recruitment, retention and advancement of Black nurses in the healthcare system.

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Objective: To evaluate the use of collar-mounted accelerometers to objectively monitor treatment outcomes in canine pruritus.

Methods: Observational data from 1,803 dogs from 2019 through 2023 were retrospectively analyzed to evaluate the efficacy of collar-mounted accelerometers to assess treatment efficacy for pruritic canine skin diseases. Accelerometer measurements were joined to electronic health records to establish symptoms, diagnoses, and interventions.

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Mosaic loss of Y (mLOY) is the most common somatic chromosomal alteration detected in human blood. The presence of mLOY is associated with altered blood cell counts and increased risk of Alzheimer disease, solid tumors, and other age-related diseases. We sought to gain a better understanding of genetic drivers and associated phenotypes of mLOY through analyses of whole-genome sequencing (WGS) of a large set of genetically diverse males from the Trans-Omics for Precision Medicine (TOPMed) program.

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Individuals who sustain a concussion can experience a range of symptoms which can significantly impact their quality of life and functional outcome. This study aims to understand the nature and recovery trajectories of post-concussion symptomatology by applying an unsupervised machine learning approach to data captured from a digital health intervention (HeadOn). As part of the 35-day program, patients complete a daily symptom diary which rates 8 post-concussion symptoms.

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The relationship between mitochondrial DNA (mtDNA) heteroplasmy and nuclear DNA (nDNA) methylation (CpGs) remains to be studied. We conducted an epigenome-wide association analysis of heteroplasmy burden scores across 10,986 participants (mean age 77, 63% women, and 54% non-White races/ethnicities) from seven population-based observational cohorts. We identified 412 CpGs (FDR p < 0.

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We created a comprehensive whole blood splice variation quantitative trait locus (sQTL) resource by analyzing isoform expression ratio (isoform-to-gene) in Framingham Heart Study (FHS) participants (discovery: n=2,622; validation: n=1,094) with whole genome (WGS) and transcriptome sequencing (RNA-seq) data. External replication was conducted using WGS and RNA-seq from the Jackson Heart Study (JHS, n=1,020). We identified over 3.

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Background: Robust epidemiological data regarding population incidence and prevalence of functional neurological disorder (FND) would be helpful with regards to resource allocation and planning for this disorder, particularly given high symptom burden and high healthcare utilisation. We therefore aimed to systematically review and synthesise available data on FND incidence and prevalence.

Methods: PubMed was searched to identify original research articles that reported on the incidence or prevalence of FND.

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Background: The association of overall cardiovascular health (CVH) with changes in DNA methylation (DNAm) has not been well characterized.

Methods: We calculated the American Heart Association's Life's Essential 8 (LE8) score to reflect CVH in five cohorts with diverse ancestry backgrounds. Epigenome-wide association studies (EWAS) for LE8 score were conducted, followed by bioinformatic analyses.

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Black adults have higher incidence of all-cause mortality and worse cardiovascular disease (CVD) outcomes when compared to other U.S. populations.

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The purpose of this study is to describe the development and initial validation of a survey focused on problematic situations involving e-cigarette use by rural Native Hawaiian and Pacific Islander (NHPI) youths. A 5-phase approach to test development and validation was used. In Phase 1 (Item Generation), survey items were created from a series of focus groups with middle school youths on Hawai'i Island ( = 69).

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Background: Nearly 3% to 4% of Black individuals in the United States carry the transthyretin V142I variant, which increases their risk of heart failure. However, the role of cardiovascular (CV) risk factors (RFs) in influencing the risk of clinical outcomes among V142I variant carriers is unknown.

Objectives: This study aimed to assess the impact of CV RFs on the risk of heart failure in V142I carriers.

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Adult-onset asthma, notably prevalent among healthcare professionals, especially nurses, is often attributed to occupational factors such as exposure to cleaning agents. Studies consistently underscore the substantial role of such exposure in work-related asthma among hospital staff. We aimed to (a) identify and characterize current practices in cleaning and aerosolized medication administration; (b) assess changes in practices since a similar 2003 study of Texas healthcare workers; and (c) identify factors contributing to diverse exposures within healthcare job categories.

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Background: In 2017, nurse practitioners (NPs) became the first non-physician healthcare providers authorised to independently provide medication abortion (MA) in Canada. We aimed to report on demographic and clinical characteristics of NPs providing mifepristone/misoprostol MA in Canada and to identify context-specific barriers and enablers to NP provision of mifepristone/misoprostol MA in Canada among MA providers and non-providers.

Methods: From August 2020 to February 2021, we invited Canadian NPs to complete a national, web-based, bilingual (English/French) survey.

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Article Synopsis
  • * Analysis of 36 studies revealed six subtypes of FND and showed that new cases were more frequent in the third trimester, with some patients receiving inappropriate treatments like anti-seizure medications.
  • * The authors emphasize the need for more prospective research to better understand the impact of FND on women's health during and after pregnancy.
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  • Cognitive symptoms are common in various neuropsychiatric disorders, leading to increased distress and lower quality of life, but self-guided digital interventions could help bridge treatment gaps.
  • A meta-analysis of 76 trials involving over 5,200 participants showed that these interventions had a small-to-moderate positive effect on cognitive function and mental health, while their impact on fatigue and quality of life was only marginally significant.
  • Though self-guided digital interventions can benefit some patients in the short term, their effectiveness on daily living activities and long-term outcomes is still unclear.
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  • Whole genome sequencing (WGS) helps identify rare genetic variants that may explain the missing heritability of coronary artery disease (CAD) by analyzing 4,949 cases and 17,494 controls from the NHLBI TOPMed program.
  • The study estimates that the heritability of CAD is around 34.3%, with ultra-rare variants contributing about 50%, especially those with low linkage disequilibrium.
  • Functional annotations show significant enrichment of CAD heritability, highlighting the importance of ultra-rare variants and specific regulatory mechanisms in different cells as major factors influencing genetic risk for the disease.
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  • The study investigates how rare non-coding genetic variations affect complex traits, specifically focusing on human height by analyzing data from over 333,100 individuals across three large datasets.
  • Researchers found 29 significant rare variants linked to height, with impacts ranging from a decrease of 7 cm to an increase of 4.7 cm, after considering previously known variants.
  • The team also identified specific non-coding variants near key genes associated with height, demonstrating a new method for understanding the effects of rare variants in regulatory regions using whole-genome sequencing.
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The spectrum, pathophysiology and recovery trajectory of persistent post-COVID-19 cognitive deficits are unknown, limiting our ability to develop prevention and treatment strategies. We report the 1-year cognitive, serum biomarker and neuroimaging findings from a prospective, national study of cognition in 351 COVID-19 patients who required hospitalization, compared with 2,927 normative matched controls. Cognitive deficits were global, associated with elevated brain injury markers and reduced anterior cingulate cortex volume 1 year after COVID-19.

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We rigorously assessed a comprehensive association testing framework for heteroplasmy, employing both simulated and real-world data. This framework employed a variant allele fraction (VAF) threshold and harnessed multiple gene-based tests for robust identification and association testing of heteroplasmy. Our simulation studies demonstrated that gene-based tests maintained an appropriate type I error rate at α = 0.

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Article Synopsis
  • Functional Neurological Disorder (FND) is increasingly recognized as a legitimate and treatable condition, yet iatrogenic harm to patients remains a significant issue.
  • Despite recent advances in understanding and treating FND, harm from misdiagnosis, delayed care, and stigma continues to affect patients, highlighting the need for better awareness among healthcare professionals.
  • The review outlines the sources of this harm and suggests strategies for prevention, including improving diagnostic accuracy, enhancing communication, and fostering parity with other medical conditions.
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Article Synopsis
  • Somatic mutations in hematopoietic stem cells (HSCs) can give these cells a survival advantage, particularly affecting a crucial chromatin modifier gene involved in blood cell formation.* -
  • A study using a conditional loss of function model showed that this gene is vital for normal development of red and monocytic blood cells, revealing that HSCs lacking this gene fail to function properly despite having a normal number.* -
  • The absence of this gene leads to increased DNA damage and stress in HSCs, activating the p53 pathway, which emphasizes its critical role in preserving HSC function and genomic stability during blood cell development.*
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