427 results match your criteria: "Dalhousie University. Halifax[Affiliation]"

The US Food and Drug Administration's controversial decision to grant accelerated approval to aducanumab (Aduhelm), a therapy for Alzheimer's disease, has motivated multiple policy reforms. Drawing a case series of other drugs granted accelerated approval and interviews of senior FDA officials, I argue that reform should be informed but not defined by aducanumab. Rather, structural reforms are needed to reshape FDA's core priorities and restore the regulatory system's commitment to scientific rigor.

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Objective: To risk-stratify COVID-19 patients being considered for discharge from the emergency department (ED).

Methods: We conducted an observational study to derive and validate a clinical decision rule to identify COVID-19 patients at risk for hospital admission or death within 72 hours of ED discharge. We used data from 49 sites in the Canadian COVID-19 Emergency Department Rapid Response Network (CCEDRRN) between March 1, 2020, and September 8, 2021.

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Background: The COVID-19 pandemic has spotlighted the politicization of public health issues. A public health monitoring tool must be equipped to reveal a public health measure's political context and guide better interventions. In its current form, infoveillance tends to neglect identity and interest-based users, hence being limited in exposing how public health discourse varies by different political groups.

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The International Collaboration on Cancer Reporting (ICCR) was founded by major pathology organizations from around the world to produce internationally standardized and evidence-based datasets for pathologists' reporting of cancer. Its goal is to improve cancer patient outcomes worldwide and to advance international benchmarking in cancer management. The ICCR cancer dataset development schedule is aligned with revisions of the WHO Classification of Tumours ("Blue Book") series, and in 2015 ICCR developed an initial series of thoracic datasets including a dataset for neoplasms of the heart, pericardium, and great vessels.

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Carfilzomib is an active and commonly used treatment in patients with multiple myeloma (MM). Using the Canadian Myeloma Research Group Database, we performed a retrospective observational study of patients treated with carfilzomib for relapse of MM in a real-world setting in Canada between years 2007 and 2020. A total of 445 patients were included in this study: the doublet (Kd/p,  = 218) and triplets (KCd,  = 88; KRd,  = 99; KPd/p,  = 40).

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Article Synopsis
  • * Data from 11 heavily pretreated patients indicate that selinexor (X) regimens show strong effectiveness and produce lasting responses, even when used later in treatment.
  • * X-containing regimens resulted in better overall response rates and longer progression-free survival compared to previous anti-BCMA treatments, highlighting their potential in addressing an ongoing treatment gap.
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Sustainable management of exploited populations benefits from integrating demographic and genetic considerations into assessments, as both play a role in determining harvest yields and population persistence. This is especially important in populations subject to size-selective harvest, because size selective harvesting has the potential to result in significant demographic, life-history, and genetic changes. We investigated harvest-induced changes in the effective number of breeders ( ) for introduced brook trout populations () in alpine lakes from western Canada.

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The crystallization process directly affects the physicochemical properties and active centers of zeolites; however, controllable tuning of the zeolite crystallization process remains a challenge. Herein, we utilized a polymer (polyacrylamide, PAM) to control the precursor structure evolution of TS-1 zeolite through a two-step crystallization process, so that the crystallization path was switched from a classical to a non-classical mechanism, which greatly accelerated nucleation and enriched active Ti sites. The TS-1 crystallization process was investigated by means of various advanced characterization techniques.

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Collagen fibrils are a key component of the extracellular matrix of mammalian tissues where they serve as structural elements and as a ligand for receptor-mediated signaling. As collagen molecules assemble into fibrils, or , they acquire a modulation of their molecular and electron densities called the D-band, with a 67 nm spacing, that can be visualized by cryo-electron microscopy. The D-band is composed of a gap region missing one-fifth of the molecules in the cross-section compared to the overlap region.

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Environmental variables are often the primary drivers of species' distributions as they define their niche. However, individuals, or groups of individuals, may sometimes adopt a limited range within this larger suitable habitat as a result of social and cultural processes. This is the case for Eastern Caribbean sperm whales.

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pacemaker infection: A case report.

J Assoc Med Microbiol Infect Dis Can

March 2022

Faculty of Medicine, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.

Background: is a rapidly growing mycobacterium, ubiquitous in soil and water, but it is an uncommon cause of infections in immunocompetent hosts. Cardiac device infections and bloodstream infections due to non-tuberculous mycobacteria are rare.

Case Presentation: We present the case of an 85-year-old patient with infective endocarditis and pacemaker lead infection secondary to .

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By measuring the temporal consistency, or repeatability, in the diets of predators, we can gain a better understanding of the degree of individual specialization in resource utilization and implications for predator-prey interactions, population dynamics, and food web structure. To measure repeatability, we require repeated diet estimates of individuals over time, such as those derived from quantitative fatty acid signature analysis (QFASA), a popular diet estimation technique. However, diet estimates are often lengthy compositional vectors with many zeros, as some prey will not be consumed by all individuals, precluding the use of previously proposed measures of repeatability.

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We present a simple model for the spread of an infection that incorporates spatial variability in population density. Starting from first-principle considerations, we explore how a novel partial differential equation with state-dependent diffusion can be obtained. This model exhibits higher infection rates in the areas of higher population density-a feature that we argue to be consistent with epidemiological observations.

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Cognition, frailty, and falls have been examined independently as potential correlates of fracture risk, but not simultaneously. Our objective was to explore the association between cognition, frailty, and falls and self-reported incident fractures to determine if these factors show significant independent associations or interactions. We included participants who completed the Canadian Longitudinal Study on Aging (CLSA) 2012-2015 baseline comprehensive assessment, did not experience any self-reported fractures in the year prior to cohort recruitment, and completed the follow-up questionnaire at year 3 ( = 26,982).

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Beginning in March of 2020, the unprecedented circumstances of the COVID-19 pandemic caused a shift in the ways in which governments, and all organizations, performed many of their functions, including the ways in which they make decisions. In Westminster parliamentary democracies, the executive branch-with the support of the public service-has the capacity to respond quickly and decisively to matters at hand, which can make the system particularly well suited to deal with emergencies. However, the expedited approach can come at some cost in the sense that a higher tolerance for risk earlier in the process can create an increased need for problem-solving later on.

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Article Synopsis
  • Plankton imaging systems with automated classification have enhanced the study of aquatic ecosystems by enabling detailed tracking of plankton populations.
  • These systems capture high-resolution imaging data, offering insights not only into species abundance but also into functional traits of individual plankton.
  • The text suggests using machine learning and computer vision techniques to analyze this imaging data, proposing that these methods could be applied to other organisms in both aquatic and terrestrial environments.
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Objective: Medical care and weight related experiences have been challenged by the coronavirus disease 2019 (COVID-19) pandemic for those living with obesity. The magnitude of this impact requires further attention in order to optimize patient care and outcomes. The aim of this study was to assess the impact of the COVID-19 pandemic and lockdown on access to, and experience of, medical care, weight gain and management strategies, as well as predictors of weight gain.

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Children and young people with CF (CYPwCF) get advice about using positive expiratory pressure (PEP) or oscillating PEP (OPEP) devices to clear sticky mucus from their lungs. However, little is known about the quantity (number of treatments, breaths, or sets) or quality (breath pressures and lengths) of these daily airway clearance techniques (ACTs) undertaken at home. This study used electronic pressure sensors to record real time breath-by-breath data from 145 CYPwCF (6-16y) during routine ACTs over 2 months.

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Bicondylar Tibial Plateau Fractures: What Predicts Infection?

J Am Acad Orthop Surg

October 2022

From the Boston Medical Center, Boston, MA, (Olszewski, Tornetta III), MetroHealth Medical Center , Cleveland, OH, (Manzano, Wilson, Joseph, Vallier), Stony Brook University, Setauket- East Setauket, NY, (Pawlak, Kottmeier), University of Houston, Houston, TX, (Adam Miller, Gary), Washington University, St. Louis, MO, (Namm, Anna Miller, Gupte), Vanderbilt University Medical Center, Nashville, TN, (Rodriguez-Buitrago, Obremskey), the Division of Orthopaedic Surgery Lahey Hospital & Medical Center, Burlington, MA, (Willier III, Marcantonio), The Ohio State Wexner Medical Center, Columbus, OH, (Phieffer, Sheridan), Carolinas Medical Center, Charlotte, NC, (Li, Karunakar), Mayo Clinic, Rochester, MN, (Vargas-Hernandez, Yuan), the Department of Orthopaedics (Shapiro, Pratson), University of North Carolina, Chapel Hill, NC, Oregon Health & Science University, Portland, OR, (Friess, Jenkins), Dalhousie University-Halifax, Canada, (Leighton, Alqudhaya, Aljilani), Indiana University Orthopedics, Indianapolis, IN, (Mullis, Gruenwald), Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom, (Ollivere, Myint), University Alabama Birmingham, Birmingham, AL, (Odom, Spitler), LSUHSC Department of Orthopaedic Surgery, New Orleans, LA, (Suwak, Shah), and the Geisinger Musculoskeletal Institute, Danville, PA (Rocha, Horwitz).

Objectives: The purpose of this study was to identify the patient, injury, and treatment factors associated with infection of bicondylar plateau fractures and to evaluate whether center variation exists.

Design: Retrospective review.

Setting: Eighteen academic trauma centers.

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Article Synopsis
  • Gene flow between wild and domestic salmon populations is a significant concern, particularly regarding the influence of European salmon on North American aquaculture despite regulations against their use in Canada.
  • Evidence shows that farmed salmon in North America increasingly exhibit European ancestry, with some individuals having over 40% European genetic material.
  • Studies reveal that even juvenile wild salmon near aquaculture sites show signs of European heritage, indicating that hybridization and the potential impacts on wild populations are ongoing issues.
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Growth hormone receptor knockout (GHRKO) mice have been used for 25 years to uncover some of the many actions of growth hormone (GH). Since they are extremely long-lived with enhanced insulin sensitivity and protected from multiple age-related diseases, they are often used to study healthy aging. To determine the effect that adipose tissue has on the GHRKO phenotype, our laboratory recently created and characterized adipocyte-specific GHRKO (AdGHRKO) mice, which have increased adiposity but appear healthy with enhanced insulin sensitivity.

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Article Synopsis
  • The study aimed to analyze the practice patterns of PSA testing and imaging among older men in Ontario on continuous androgen deprivation therapy for non-metastatic castration-resistant prostate cancer (nmCRPC).
  • Using administrative health data from 2008 to 2019, researchers identified 944 men with nmCRPC and found that many had infrequent PSA testing and limited imaging in the year after their condition worsened.
  • The results suggest that underutilization of these monitoring tools may delay critical treatment decisions, potentially affecting patient outcomes and highlighting the need for better adherence to clinical guidelines.
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