1,589 results match your criteria: "University of Montreal Hospital[Affiliation]"

Population-based birth cohort study on diabetes in pregnancy and infant hospitalisations in Cree, other First Nations and non-Indigenous communities in Quebec.

BMJ Open

December 2023

Department of Obstetrics and Gynecology, Lunenfeld-Tanenbaum Research Institute, Prosserman Population Health Center, Mount Sinai Hospital, Institute of Health Policy, Management and Evaluation, Dalla Luna School of Public Health, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada

Objectives: Diabetes in pregnancy, whether pre-gestational (chronic) or gestational (de novo hyperglycaemia), increases the risk of adverse birth outcomes. It is unclear whether gestational diabetes increases the risk of postnatal morbidity in infants. Cree First Nations in Quebec are at high risk for diabetes in pregnancy.

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Image reconstruction using UNET-transformer network for fast and low-dose PET scans.

Comput Med Imaging Graph

December 2023

University of Montreal Hospital Research Centre (CRCHUM), Montreal, Canada; Department of Physics, University of Montreal, Montreal, QC, Canada; Department de Radiation Oncology, University of Montreal Hospital Centre (CHUM), Montreal, Canada.

Introduction: Low-dose and fast PET imaging (low-count PET) play a significant role in enhancing patient safety, healthcare efficiency, and patient comfort during medical imaging procedures. To achieve high-quality images with low-count PET scans, effective reconstruction models are crucial for denoising and enhancing image quality. The main goal of this paper is to develop an effective and accurate deep learning-based method for reconstructing low-count PET images, which is a challenging problem due to the limited amount of available data and the high level of noise in the acquired images.

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Background And Objectives: Hemimegalencephaly (HME) is a rare diffuse malformation of cortical development characterized by unihemispheric hypertrophy, drug-resistant epilepsy (DRE), hemiparesis, and developmental delay. Definitive treatment for HME-related DRE is hemispheric surgery through either anatomic (AH) or functional hemispherectomy (FH). This individual patient data meta-analysis assessed seizure outcomes of AH and FH for HME with pharmacoresistant epilepsy, predictors of Engel I, and efficacy of different FH approaches.

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Introduction: Despite its high prevalence and significance, there is still no widely available method to quantify cough. In order to demonstrate agreement with the current gold standard of human annotation, emerging automated techniques require a robust, reproducible approach to annotation. We describe the extent to which a human annotator of cough sounds (a) agrees with herself (intralabeller or intrarater agreement) and (b) agrees with other independent labellers (interlabeller or inter-rater agreement); we go on to describe significant sex differences in cough sound length and epochs size.

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The risk of developing total metachronous advanced neoplasia (TMAN) in patients with index serrated lesions (SL) or adenoma with high-grade dysplasia (HGD) is unknown. We evaluated this risk in patients with either HGD, SL < 10 mm or SL ≥ 10 mm at index colonoscopy, who underwent surveillance colonoscopies. This retrospective cohort study evaluated all consecutive patients (n = 2477) diagnosed between 2010 and 2019 with colorectal HGD, SLs < 10 mm or SLs ≥ 10 mm.

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Background: Second-trimester abortion may result in a live birth, but the extent to which this outcome occurs is unknown.

Objective: This study aimed to examine rates of live birth after pregnancy termination in the second trimester and identify associated risk factors.

Study Design: We conducted a retrospective cohort study of 13,777 second-trimester abortions occurring in hospital settings between April 1, 1989 and March 31, 2021 in Quebec, Canada.

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Introduction: Despite high prevalence and increased severity and burden of overactive bladder (OAB) and fecal incontinence (FI) in the elderly, sacral neuromodulation (SNM) is often overlooked as a potential treatment option for this demographic. In this study, we report the outcomes of SNM in patients aged 75 years or older at the time of surgery.

Methods: We conducted a retrospective cohort study of patients who underwent SNM implantation between 2013 and 2022 performed by a single, high-volume urologist at a tertiary center.

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Hospitalization and hospital mortality rates during the first and second waves of the COVID-19 pandemic in Quebec: interrupted time series and decomposition analysis.

Public Health

December 2023

University of Montreal Hospital Research Centre, Montreal, Quebec, Canada; Division of Cardiology, Department of Medicine, University of Montreal Hospital Centre, Montreal, Quebec, Canada.

Objectives: We investigated hospitalization and hospital mortality rates by cause during the first year of the COVID-19 pandemic in Quebec, Canada.

Study Design: Interrupted time series and decomposition analysis.

Methods: We analyzed hospital mortality during the first (February 25-August 22, 2020) and second waves (August 23, 2020-March 31, 2021), compared with 2019.

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Poly(ADP-ribose) polymerase inhibitors in combination with androgen-receptor signaling inhibitors are a promising therapeutic option for patients with metastatic castration-sensitive prostate cancer (mCSPC) and homologous recombination repair (HRR) gene alterations. Here, we describe the design and rationale of the multinational, phase III, TALAPRO-3 study comparing talazoparib plus enzalutamide versus placebo plus enzalutamide in patients with mCSPC and HRR gene alterations. The primary end point is investigator-assessed radiographic progression-free survival (rPFS) per RECIST 1.

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 Oral cavity squamous cell carcinoma (OCSCC) is the most common malignancy in the oral cavity. Two types of mandibular resections have been described: the segmental mandibulectomy and the marginal mandibulectomy. Both may have a different impact over the quality of life, oncological prognosis, and functional or aesthetic result.

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Objective And Design: 15-Lipoxygenase-1 (15-LOX-1) catalyzes the biosynthesis of many anti-inflammatory and immunomodulatory lipid mediators and was reported to have protective properties in several inflammatory conditions, including osteoarthritis (OA). This study was designed to evaluate the expression of 15-LOX-1 in cartilage from normal donors and patients with OA, and to determine whether it is regulated by DNA methylation.

Methods: Cartilage samples were obtained at autopsy from normal knee joints and from OA-affected joints at the time of total knee joint replacement surgery.

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Objectives: Hemimegalencephaly (HME) is a rare congenital brain malformation presenting predominantly with drug-resistant epilepsy. Hemispheric disconnective surgery is the mainstay of treatment; however, little is known about how postoperative outcomes compare across techniques. Thus we present the largest single-center cohort of patients with HME who underwent epilepsy surgery and characterize outcomes.

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This study aimed to characterize the sensory responses observed when electrically stimulating the white matter surrounding the posterior insula and medial operculum (PIMO). We reviewed patients operated on under awake conditions for a glioma located in the temporoparietal junction. Patients' perceptions were retrieved from operative reports.

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Relugolix is an oral GnRH receptor antagonist approved for men with advanced prostate cancer. Relugolix treatment has demonstrated an ability to lower testosterone to sustained castration levels in the phase 4 HERO study. Herein, we describe the results of a secondary endpoint of castration resistance-free survival (CRFS) during 48 weeks of treatment and profile patients with castration-resistant prostate cancer (CRPC).

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Article Synopsis
  • Lennox-Gastaut syndrome (LGS) is a severe epilepsy disorder in children that is hard to treat; when medications fail, surgeries like vagus nerve stimulation (VNS) and corpus callosotomy (CC) may be options, with CC often being more effective.
  • This study reviewed the outcomes of 127 children with LGS who had undergone CC after unsuccessful VNS, focusing on their seizure types and surgery results.
  • The findings showed that about 83% of patients experienced at least a 50% reduction in drop attacks after CC, demonstrating that CC is an important option for improving seizure control with low surgical risks.
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An independent observer can improve procedural quality. We evaluated the impact of the observer (Hawthorne effect) on important quality metrics during colonoscopies. In a single-center comparative study, consecutive patients undergoing routine screening or diagnostic colonoscopy were prospectively enrolled.

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A new direction for cytomegalovirus prophylaxis among transplant recipients: Benefits and nonviral outcomes of letermovir use as primary CMV prophylaxis.

Curr Opin Infect Dis

December 2023

Division of Infectious Disease, Department of Medicine, Inova Medical Group, Falls Church, Virginia, USA.

Purpose Of Review: Letermovir has changed the game of primary prophylaxis against cytomegalovirus (CMV) for hematopoietic stem cell transplant (HSCT) and more recently, solid organ transplant recipients. This is largely due to letermovir's similar efficacy in protecting against CMV reactivation and disease, along with its superior safety profile, notably reduced myelotoxicity, and lack of renal dose adjustment compared to standard agents like valganciclovir. This review will describe the potential benefits and clinical considerations of letermovir as prophylaxis among transplant recipients, with a focus on recent evidence describing nonviral outcomes of CMV.

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Severe neonatal birth injury: Observational study of associations with operative, cesarean, and spontaneous vaginal delivery.

J Obstet Gynaecol Res

December 2023

Department of Pediatrics, Sainte-Justine Hospital Research Centre, University of Montreal, Montreal, Quebec, Canada.

Article Synopsis
  • - The study aimed to analyze the link between successful and unsuccessful operative vaginal deliveries (using tools like forceps or vacuum) and the risk of severe birth injuries in newborns, utilizing data from over 1 million births in Quebec from 2006 to 2019.
  • - Researchers found that vacuum and forceps deliveries significantly increased the risk of severe injuries compared to spontaneous deliveries, with forceps linked to higher rates of serious brain and spinal injuries and vacuum to specific types of hemorrhaging and skull fractures.
  • - The findings suggest that both operative vaginal deliveries and failed attempts leading to emergency cesareans carry higher risks for severe birth injuries, highlighting the need for careful decision-making in delivery methods.
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Purpose: We report a case of bilateral severe pigmentary glaucoma and paracentral acute middle maculopathy (PAMM) following laser treatment for iris color change.

Observations: A 32-year-old female presented to our emergency clinic after having undergone 4 sessions of bilateral cosmetic iris laser treatment in Turkey to lighten the color of her dark brown irides. Visual acuity was 20/150 in the right eye (OD) and counting fingers in the left eye (OS) at presentation.

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Distinguishing lupus erythematosus panniculitis (LEP) from subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is a diagnostic challenge with important clinical implications. Immunohistochemical expression of interferon regulatory factor 8 (IRF8) has been shown to highlight cells with plasmacytoid dendritic cell differentiation. Considering that the presence of plasmacytoid dendritic cells highlighted by CD123 immunolabeling is a well-described feature that supports LEP over SPTCL, we hypothesized that IRF8 immunohistochemistry can be used as a diagnostic test to improve accuracy in differentiating LEP from SPTCL.

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Article Synopsis
  • COVID-19 significantly reduced selfie-related deaths, likely due to decreased travel and risky behavior during lockdowns, with a total of 332 deaths reported between 2014 and 2021.
  • The study found that during the pandemic (March 2020-April 2021), there were only 18 selfie-related deaths, compared to 4.3 per month before the pandemic.
  • Most selfie-related fatalities occurred in India and predominantly involved young men, with a shift in causes of death from drowning pre-pandemic to falls during the pandemic.
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Joint statement in support of hepatitis C human challenge studies.

Lancet Gastroenterol Hepatol

November 2023

Departments of Philosophy, Medicine, and Epidemiology and Biostatistics, Western University, London, ON, Canada.

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Article Synopsis
  • RGC death in glaucoma leads to permanent vision loss due to the limited ability of the central nervous system to regenerate, prompting interest in repopulating these cells to restore vision.
  • The RReSTORe Consortium was formed to tackle the complexities of repairing the visual pathway and focuses on five key areas: RGC development, transplantation methods, cell survival, retinal connections, and eye-to-brain communication.
  • Their collaborative approach aims to combine various scientific fields to overcome existing challenges and develop effective therapies for restoring vision impaired by optic neuropathies.
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Article Synopsis
  • The study examined how place of birth affects pregnancy outcomes among minority Anglophones and majority Francophones in Quebec, analyzing over 1.4 million births from 1998 to 2019.
  • The findings revealed that minority Anglophones face a higher risk of preterm birth compared to Francophones, especially if they give birth closer to home, while those who deliver farther away have a lower risk.
  • The research suggests that ethnocultural disparities in negative birth outcomes are linked to the location of delivery.
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Assisted Reproductive Technology and Cardiovascular Outcomes in Parents and Offspring.

Can J Cardiol

January 2024

Institut national de santé publique du Québec, Montréal, Québec, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montréal, Québec, Canada; University of Montréal Hospital Research Centre, Montréal, Québec, Canada; Department of Social and Preventive Medicine, School of Public Health, University of Montréal, Montréal, Québec, Canada. Electronic address:

Background: The impact of assisted reproductive technology (ART) on the cardiovascular system is unclear.

Methods: We conducted a retrospective longitudinal cohort study of 1,001,593 pregnancies conceived naturally or through ART from 2008 to 2019 in Québec to assess the association of ART with cardiovascular disease in families. The exposure measure was ART.

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