Publications by authors named "Mark Harrison"

Objective: Despite knowledge that health outcomes vary according to patient characteristics, identity, and geography, including underrepresented populations in arthritis research remains a challenge. We conducted interviews to explore how researchers in arthritis have used equity, diversity, and inclusion (EDI) principles to inform their research.

Methods: Semi-structured interviews were conducted with individuals who 1) have experience conducting arthritis research studies; 2) reside in and/or conduct their research in Canada; and 3) speak English or French.

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This study investigates the production of lignin/silica hybrid nanoparticles (LSNPs) from rice husks, an abundant agricultural waste, and their capacity to stabilize Pickering emulsions for biocatalysis. Lignin extracted from rice husks under alkaline conditions was co-precipitated with silica to produce LSNPs in the presence or absence of ethanol as a co-solvent. Characterization of LSNPs revealed that ethanol played a key role in forming uniform, spherical nanoparticles and minimizing aggregation.

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Lanostene-derived triterpenoids and β-glucans are important metabolites in mushrooms associated with benefits to human health. The medicinal value of the Australian species remains unclear, with no data on triterpenoid distribution or glucan content. In the present study, 22 Australian specimens were analyzed for triterpenoid and glucan contents.

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Article Synopsis
  • - The classification of termites, particularly the diverse Neoisoptera group, needs significant updates due to many incorrectly grouped taxa; researchers propose a new classification based on genomic analyses.
  • - The study identifies seven monophyletic family lineages within Neoisoptera and 18 subfamily lineages in the species-rich Termitidae, including several new subfamilies and the revival of some older ones.
  • - The new classification method is built on clear monophyletic lineages, which enhances its stability and adaptability for future studies, allowing it to incorporate yet-to-be-discovered species easily.
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Eusocial insects, such as ants and termites, are characterized by high levels of coordinated social organization. This is contrasted by solitary insects that display more limited forms of collective behavior. It has been hypothesized that this gradient in sociobehavioral sophistication is positively correlated with chemical profile complexity, due to a potentially increased demand for diversity in chemical communication mechanisms in insects with higher levels of social complexity.

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  • Extraocular electrical stimulation can protect retinal cells but currently relies on patients frequently setting up external electrodes, which is inconvenient.
  • A new minimally-invasive implant has been developed to provide a reliable method for chronic electrical stimulation of the retina, aimed at improving patient adherence to treatment.
  • In a study with adult felines, the device showed surgical and stimulation safety with no adverse effects, stable electrode performance, and no significant changes to retinal health, suggesting it could be a viable long-term solution.
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  • The study aims to reduce the unnecessary use of routine laboratory tests in hospitals, which leads to healthcare waste and potential harm to patients, by implementing a multicomponent intervention across 16 hospitals in British Columbia, Canada.
  • It uses a stepped-wedge cluster randomized trial design, evaluating key metrics such as the number of tests ordered per patient-day and overall healthcare costs, while ensuring the intervention's sustainability after implementation.
  • The research builds on an existing effective intervention, with adaptable elements to allow wider application in different healthcare settings, enhancing its potential impact on improving patient care.
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Introduction: Diagnostic imaging is vital in emergency departments (EDs). Accessibility and reporting impacts ED workflow and patient care. With radiology workforce shortages, reporting capacity is limited, leading to image interpretation delays.

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Article Synopsis
  • - The study examines the effect of the timing of adjuvant chemotherapy after colorectal cancer surgery on long-term outcomes, specifically disease-free survival, but there isn't a clear agreement on the best timing for treatment.
  • - Conducted as a post hoc analysis of the SCOT trial involving 5,719 patients from multiple countries, the research compares outcomes for those starting chemotherapy within 6 weeks after surgery versus those starting later.
  • - Results show that patients starting chemotherapy early (within 6 weeks) had a 5-year disease-free survival rate of 78%, compared to 73.2% for those who started later, highlighting potential benefits of earlier treatment initiation.
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Genome sequencing quality, in terms of both read length and accuracy, is constantly improving. By combining long-read sequencing technologies with various scaffolding techniques, chromosome-level genome assemblies are now achievable at an affordable price for non-model organisms. Insects represent an exciting taxon for studying the genomic underpinnings of evolutionary innovations, due to ancient origins, immense species-richness, and broad phenotypic diversity.

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Hospital quality ratings are widely available to help Medicare beneficiaries make an informed choice about where to receive care. However, how beneficiaries' trade-off between different quality domains (clinical outcomes, patient experience, safety, efficiency) and other considerations (out-of-pocket cost, travel distance) is not well understood. We sought to study how beneficiaries make trade-offs when choosing a hypothetical hospital.

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Purpose: To investigate the roles, challenges, and implications of using patient-reported outcome measures (PROMs) in predicting the risk of hospital readmissions.

Methods: We systematically searched four bibliometric databases for peer-reviewed studies published in English between 1 January 2000 and 15 June 2023 and used validated PROMs to predict readmission risks for adult populations. Reported studies were analysed and narratively synthesised in accordance with the CHARMS and PRISMA guidelines.

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Introduction: The Reference Drug Program (RDP) was established to steer patients toward equally safe and cost-effective medication under British Columbia's public drug coverage. Each RDP class covers at least one reference drug, and non-reference drugs are reimbursed up to the cost of the reference drug. In 2016, the RDP updated to include proton pump inhibitors (PPIs).

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Domains as functional protein units and their rearrangements along the phylogeny can shed light on the functional changes of proteomes associated with the evolution of complex traits like eusociality. This complex trait is associated with sterile soldiers and workers, and long-lived, highly fecund reproductives. Unlike in Hymenoptera (ants, bees, and wasps), the evolution of eusociality within Blattodea, where termites evolved from within cockroaches, was accompanied by a reduction in proteome size, raising the question of whether functional novelty was achieved with existing rather than novel proteins.

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Uncontrolled fires place considerable burdens on forest ecosystems, compromising our ability to meet conservation and restoration goals. A poor understanding of the impacts of fire on ecosystems and their biodiversity exacerbates this challenge, particularly in tropical regions where few studies have applied consistent analytical techniques to examine a broad range of ecological impacts over multiyear time frames. We compiled 16 y of data on ecosystem properties (17 variables) and biodiversity (21 variables) from a tropical peatland in Indonesia to assess fire impacts and infer the potential for recovery.

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We aimed to (1) identify existing triage approaches for referral of patients with suspected inflammatory arthritis (IA) from primary care physicians (PCP) to rheumatologists, (2) describe their characteristics and methodologies for clinical use, and (3) report their level of validation for use in a publicly funded healthcare system. The comprehensive search strategy of multiple databases up to October 2023 identified relevant literature and focussed on approaches applied at the PCP-Rheumatologist referral stage. Primary, quantitative studies, reported in English were included.

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Myocardial infarction (MI) remains a common cause of morbidity and mortality. Although many well-known risk factors exist, the association between inherited thrombophilia disorders and acute MI is not well described. Here, we present a case of a 75-year-old male with known 4G/4G PAI-1 polymorphism, methylenetetrahydrofolate reductase (MTHFR) mutation, and peripheral artery disease (PAD) post stent placement who presented with cardiogenic shock in the setting of acute MI with no prior significant cardiac history.

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The pathophysiology of aortic valve stenosis is degenerative and calcific. It may be exacerbated by atherosclerotic processes characterized by lipid accumulation and inflammation. When the stenosis gets hemodynamically severe, the valves would need to be replaced.

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Objective: This study was undertaken to evaluate the impact of a Multidisciplinary Care Assessment (MCA) billing code on health system costs and access to care in British Columbia (BC).

Methods: Data on all people treated by rheumatologists in BC were obtained from five linked health administrative databases held by Population Data BC from April 1, 2006, to March 31, 2020. Rheumatologists were allocated to either the intervention (ever-billers) or control groups (never-billers).

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Evidence that the innate immune system can respond with forms of memory upon reinfection has been accumulating over the past few years. These phenomena of "immune priming" in invertebrates, and "trained immunity" in vertebrates, are contrary to previous belief that immune memory and specificity are restricted to the adaptive immune system. However, while trained immunity is usually a response with rather low specificity, immune priming has shown highly specific responses in certain species.

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Introduction: A non-contrast CT head scan (NCCTH) is the most common cross-sectional imaging investigation requested in the emergency department. Advances in computer vision have led to development of several artificial intelligence (AI) tools to detect abnormalities on NCCTH. These tools are intended to provide clinical decision support for clinicians, rather than stand-alone diagnostic devices.

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Objective: To report participant characteristics relevant to identifying health inequities in systemic lupus erythematosus (SLE) randomized controlled trials conducted in Canada.

Methods: We conducted a scoping review by searching MEDLINE (Ovid) and Embase (1990 to June 2023), and CENTRAL (inception to June 2023). Eligible studies: used an RCT design; evaluated interventions (pharmacologic and non-pharmacologic) among SLE patients aged ≥18 years; and were conducted in Canada.

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Risk factors contributing to dementia are multifactorial. Accumulating evidence suggests a role for pathogens as risk factors, but data is largely correlative with few causal relationships. Here, we demonstrate that intermittent murine cytomegalovirus (MCMV) infection of mice, alters blood brain barrier (BBB) permeability and metabolic pathways.

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Objective: The objective was to understand how the expansion of rheumatology supply and the introduction of multidisciplinary care was associated with access to rheumatology services.

Methods: We accessed Population Data BC, a longitudinal database with de-identified individual-level health data on all residents of British Columbia, Canada, to analyze physician visits and prescribing from 2010-2011 to 2019-2020. We calculated access as the time from referral to first rheumatologist visit and, for people with rheumatoid arthritis (RA), time to first disease-modifying antirheumatic drug (DMARD).

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