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AnteayerInterdisciplinares

Multiarm multistage randomised controlled trial of inflammatory signal inhibitors (MATIS) for patients hospitalised with COVID-19 pneumonia during the UK pandemic

Por: Hazell · L. · Pillay · C. · Cornelius · V. · Phillips · R. · Charania · A. · Wason · J. · Cherlin · S. · Savic · S. · Whittington · A. · Neelakantan · P. · Collini · P. · Cook · L. · Willicome · M. · Milojkovic · D. · Kon · O. M. · Youngstein · T. · Innes · A. · Thursz · M. · Cooke · G. S.
Objectives

To determine the safety and efficacy of ruxolitinib (RUX) and fostamatinib (FOS) compared with standard of care (SOC) in patients requiring hospital admission for the treatment of COVID-19 pneumonia.

Design

Adaptive multiarm, multistage, randomised, open-label trial (three arm, two stage).

Setting

Five hospitals in England between October 2020 and September 2022.

Participants

Hospitalised patients (≥18 years) with COVID-19 pneumonia defined by a modified WHO COVID-19 severity grade of 3 or 4.

Interventions

Participants were randomly assigned 1:1:1 to receive RUX (10 mg two times per day for 7 days then 5 mg two times per day for 7 days), FOS (150 mg two times per day for 7 days then 100 mg two times per day for 7 days) or SOC.

Main outcome measures

Primary outcome was development of severe COVID-19 pneumonia (modified WHO severity grade≥5) within 14 days of randomisation. Secondary outcomes included mortality, invasive and non-invasive ventilation, venous thromboembolism, duration of hospital stay, readmissions, inflammatory markers and serious adverse events (SAEs).

Results

At stage 1, 181 patients were randomised, with 4 assessed as ineligible post randomisation. FOS was stopped early for futility with 16 participants (27.6%, n=58) developing severe COVID-19 pneumonia compared with 15 (25.0%, n=60) in the SOC arm (adjusted odds ratio (aOR) compared with SOC: 1.12; 95% CI 0.49 to 2.58; p=0.608). RUX progressed to stage 2 but the trial was stopped early due to slow recruitment. At the final analysis, 10 participants (16.1%, n=62) developed severe COVID-19 pneumonia in the RUX arm compared with 15 (24.6%, n=61) in the SOC arm (aOR: 0.63; 95% CI 0.25 to 1.57; p=0.161). Four (7.4%) participants in the FOS arm, none in the RUX arm and three (5.5%) in the SOC arm died within 14 days of randomisation. Infections were the most frequently reported SAE and were numerically higher in the FOS (10, 17.2%) and RUX (10, 16.1%) arms compared with SOC (7, 11.5%). Two unexpected serious adverse reactions occurred in the RUX arm only.

Conclusions

We found no evidence that FOS was superior to SOC for the treatment of COVID-19 pneumonia in patients requiring hospital admission. Due to early stopping, the trial was underpowered to establish RUX’s effect in this population. Further study is needed.

Trial registration number

NCT04581954; EUDRA-CT: https://www.clinicaltrialsregister.eu/ctr-search/trial/2020-001750-22/GB.

Recombinant human growth hormone (rHGH) for muscle enhancement in knee osteoarthritis: protocol for a pilot, randomised placebo-controlled trial

Por: Shah · A. · Ravi · B. · Tomescu · S. · Catapano · M. · Burkhart · T. A. · Whyne · C. · Kiss · A. · Marks · P. · Wasserstein · D. N.
Introduction

The management of active patients with symptomatic knee osteoarthritis (KnOA) who are too young for total knee arthroplasty poses a specific challenge to clinicians. Research studies show that improving quadriceps muscle strength improves pain and function; however, aspects of the disease render it difficult for patients to achieve and maintain improvements. Recombinant human growth hormone (rHGH) is shown to increase the magnitude and duration of muscle growth when combined with exercise treatment in adult populations. Hence, rHGH combined with physical therapy may provide meaningful benefits in the treatment of KnOA.

Methods and analysis

This is a single-centre, double-blind, randomised trial to pilot a future Phase III trial from 2025 to 2028. Participants are aged 18–60 with clinical and radiographic evidence of isolated degenerative arthritis of the knee (patellofemoral or tibiofemoral). The investigational product is rHGH (Saizen (somatropin of rDNA origin, EMD Serono)) and a saline placebo. Participants will deliver the solution via subcutaneous injection area once per day at a dose of 0.5 mg HGH per body surface area (0.5 mg/m2) for 6 weeks, alongside participation in a lower limb strengthening programme developed by rehabilitation specialists. 17 participants will be recruited into each study arm.

The primary outcomes are feasibility (compliance with the study drug regimen for the 6-week administration period and enrolment rate) and safety (the proportion of minor and major adverse events between groups). The primary endpoint for these outcomes will be at 6 weeks. The secondary outcomes are knee extension strength, knee flexion strength, radiographic arthritis progression, thigh muscle circumference, MRI-measured quadriceps muscle volume and patient-reported outcome measures (Knee Osteoarthritis Outcome Score (KOOS), SF-20 and Tegner). The primary endpoint for these outcomes will be at 12 weeks, and the final endpoint will be 24 months, where final radiographic (X-ray) assessment will take place.

The primary outcome of compliance will be a calculation of mean compliance between groups, which can be analysed as a t-test after the treatment period. A two-sample, two-sided t-test will compare the clinical (secondary) outcome of greatest interest: knee extension strength at baseline versus week 6 compared between treatment groups. Other secondary outcomes will be compared using a simple linear mixed-effects model. The 2 test will be used to determine whether the number of participants who made meaningful changes was different between groups. The null hypotheses are that the rHGH and placebo groups will have no difference in compliance rates, safety events, knee extension strength at 12 weeks and arthritis grade progression at 24 months.

Ethics and dissemination

This study has been approved by the Sunnybrook Research Institute Research and Ethics Board (#6427) and received a no-objection letter from Health Canada Clinical Trials. The primary sponsor is the Sunnybrook Centre for Clinical Trial Studies (CCTS). The findings of this study will be published in a peer-reviewed journal and presented at orthopaedic conferences.

Trial registration number

NCT07036003.

The PROTECT trial: Effect of titrated versus conventional induction of general anaesthesia using a target-controlled infusion system on haemodynamics in patients undergoing non-cardiac surgery - protocol for a multicentre, expertise-based randomised contr

Por: Funk · S. · Lohri · M. D. · Kopp Lugli · A. · Schindler · C. · Wiencierz · A. · Mnich · K. · Schläpfer · M. · Gaberdiel · A. P. · Puhan · M. A. · Steiner · L. A. · Gomes · N. V. · Dell-Kuster · S.
Introduction

Hypotension is a frequent complication after induction of general anaesthesia leading to end-organ injury, for which elderly and multimorbid patients are particularly susceptible. The extent of hypotension depends, among other factors, on the dose and rate of propofol administration. Target-controlled infusion systems are widely used to administer short-acting anaesthetics such as propofol and remifentanil. Commonly, induction is started with a fixed effect-site concentration. Titration, an alternative method of induction using an incremental augmentation of propofol, leads to a reduced induction dose and rate of propofol. We hypothesise that the titration method improves haemodynamic stability compared with conventional induction.

Methods and analysis

This multicentre, expertise-based randomised controlled trial takes place at four Swiss hospitals. Patients ≥55 years of age undergoing non-cardiac surgery under general anaesthesia using propofol target-controlled infusion are randomised to either a conventional or a titrated anaesthesia induction method. Patients, statisticians and, if resources allow, outcome assessors will be blinded. The primary endpoint is the mean arterial pressure under the individual baseline mean arterial pressure (area under threshold) during the first 30 min after start of induction. Secondary endpoints include the maximum deviation from baseline mean arterial pressure, haemodynamic rescue methods, propofol consumption and neurocognitive recovery after regaining consciousness.

A total of 320 patients are required to have an 80% chance of observing superiority of titration for the area under the threshold as significant at the 5% level, assuming a true difference of 100 mm Hg*min. The area under threshold and the maximum deviation will be compared between arms using mixed linear regression models.

Ethics and dissemination

Ethical approval has been obtained from all responsible ethics committees (BASEC2025-01007). The results will be presented at international meetings and published in peer-reviewed journals and may contribute to a change in clinical practice for anaesthesia induction using target-controlled infusion systems with propofol.

Trial registration number

clinicaltrials.gov (NCT06980688) and www.humanforschung-schweiz.ch (HumRes67022).

Voices beyond the margins: a protocol for a qualitative systematic review and meta-synthesis of Indigenous patients experiences accessing mainstream healthcare services in Canada

Por: Damag · S. · Villanueva · E. · Damag · N. · Plante · M. · Steinke · C. · Middha · S. · Oster · R. · Chatsis · A. · Awosoga · O. A.
Introduction

First Nations, Inuit and Métis Peoples in Canada continue to face significant disparities in healthcare access compared with non-Indigenous populations. Understanding their experiences in accessing healthcare is essential for addressing systemic barriers and promoting equitable, patient-centred care. Although existing studies have identified various barriers and facilitators to accessing healthcare, a lack of synthesised qualitative evidence delves into the intricacies of patients’ experiences. This systematic review aims to investigate Indigenous patients’ experiences with mainstream Canadian healthcare services and their recommendations for service improvement through a meta-synthesis of qualitative literature.

Methods and analysis

Meta-aggregation will be used to conduct a systematic review of qualitative studies and qualitative components of mixed-methods studies exploring experiences of Indigenous patients accessing mainstream healthcare services in Canada. Papers published in English will be searched using electronic databases, including MEDLINE, APA PsycINFO, CINAHL, Global Health, the Bibliography of Indigenous Peoples in North America and Web of Science. A comprehensive list of non-indexed and grey literature will also be searched to ensure the inclusion of community-based and non-peer-reviewed evidence. Studies meeting the inclusion criteria will be assessed for methodological quality using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist for Qualitative Research and the Aboriginal and Torres Strait Islander Quality Appraisal Tool. The review will involve the extraction of findings, categorisation into themes and synthesis into broader insights guided by the JBI meta-aggregation approach. An Indigenous advisory committee will guide the process, including interpretation of findings and ensuring alignment with Indigenous health research principles.

Ethics and dissemination

Ethics approval is not required for this study as it is based on a secondary analysis of publicly available primary studies. The completed review will be published in a peer-reviewed manuscript. Findings will also be shared with relevant Indigenous organisations and community partners through plain-language summaries and community-engaged knowledge-sharing activities.

PROSPERO registration number

CRD420250656486.

Prevalence and factors associated with pre-diabetes and undiagnosed diabetes in Cambodia: cross-sectional study based on the World Health Survey Plus 2023

Por: Chhim · S. · Ku · G. V. · Kowal · P. · Te · V. · Sorithisey · M. · Ngor · C. · Walton · P. · Maung · K. T. · Ng · N. · Naidoo · N. · Por · I. · Klipstein-Grobusch · K. · Chhea · C. · Sopheab · H.
Objective

This study aimed to determine the prevalence and factors associated with pre-diabetes and undiagnosed type 2 diabetes (UDD) in Cambodia.

Design

This analysis used data from the WHO World Health Survey Plus, which was collected using a cross-sectional design with a GIS-based, three-stage sampling approach. Multiple logistic regression was used to identify key associated factors, based on a significance level of p

Setting

Data were collected from all 25 provinces in Cambodia between 12 March 2023 and 31 May 2023.

Participants

4427 individuals aged 18 years or older, residing in the selected household for at least 6 months in the past year.

Primary outcome measures

Pre-diabetes (Haemoglobin A1c (HbA1c) 5.7%–6.4%) and UDD (HbA1c≥6.5%), without prior knowledge of having type 2 diabetes (T2D).

Results

The weighted prevalences of pre-diabetes and UDD were 26.4% (95% CI 24.0% to 29.0%) and 9.3% (95% CI 7.9% to 11.0%). Pre-diabetes prevalence was higher in urban areas compared with rural areas (adjusted OR, aOR=1.2, 95% CI 1.0 to 1.4), males (aOR=1.7, 95% CI 1.3 to 2.3), individuals aged 40–49 (aOR=1.8, 95% CI 1.4 to 2.4), individuals aged 50+ years group (aOR=2.9, 95% CI 2.3 to 3.6) compared with the 18–39 years group, overweight individuals (aOR=1.7, 95% CI 1.4 to 2.0), obese (aOR=2.1, 95% CI 1.5 to 3.0) and those with elevated total triglycerides (aOR=1.3, 95% CI 1.1 to 1.5). Similar risk factors were identified for UDD, with the addition of hypertension (aOR=1.6, 95% CI 1.3 to 2.0) and high waist circumference (aOR=2.0, 95% CI 1.5 to 2.7).

Conclusions

The high prevalence of pre-diabetes and UDD in Cambodia is a pressing public health concern. Urgent and intensive interventions are needed to effectively prevent and manage T2D, particularly among urban residents, older persons and individuals with metabolic risk factors.

Comparison of Surgery and Medicine on the Impact of Diverticulitis (COSMID) trial: a protocol for a pragmatic randomised study of diverticulitis treatment in the USA

Por: Hantouli · M. N. · Schmicker · R. H. · Tufte · J. E. · Ali · F. G. · Bennett · R. D. · Cohan · J. N. · Comstock · B. A. · Curran · T. · Davidson · G. H. · Eisenstein · S. · Fischkoff · K. N. · Fleming · F. J. · Gribovskaja-Rupp · I. · Jafari · M. D. · Kessler · L. G. · Krane · M. K.
Introduction

Each year, millions of people experience recurrent diverticulitis episodes. Elective sigmoid colon resection reduces the risk of recurrence, but The American Society of Colon and Rectal Surgeons recommends individualising surgical decisions based on the impact of the condition on a patient’s quality of life (QoL). However, no threshold for QoL impairment has been established to guide decision-making, and evidence comparing elective colectomy with medical management in terms of QoL limitation is limited. To address these gaps and to guide treatment decision-making, we designed the Comparison of Surgery and Medicine on the Impact of Diverticulitis (COSMID) trial.

The COSMID trial is a large, pragmatic randomised trial including patients with QoL-limiting diverticulitis that aims to determine if partial colectomy is superior to medical management and explore subgroups that are more likely to respond to each treatment.

Methods and analysis

COSMID will recruit 250 English-speaking and Spanish-speaking adults with imaging-confirmed and QoL-limiting diverticulitis (defined using a modified diverticulitis-related QoL survey). Participants are randomly assigned to undergo elective partial colectomy or receive comprehensive medical management (eg, selected from options including fibre, probiotics, mesalamine and rifaximin). A total of 100 patients who decline randomisation but consent to follow-up will be included in a parallel observational cohort. The primary outcome is the time-averaged score of the Gastrointestinal Quality of Life Index at 6, 9 and 12 months after randomisation. Secondary outcomes include clinical adverse events, healthcare utilisation, recurrent episodes of diverticulitis and additional patient-reported outcomes like the Diverticulitis Quality of Life instrument, decisional regret and work productivity. Exploratory analyses aim to identify differential treatment effects based on patients’ characteristics.

Ethics and dissemination

This trial was approved by the Vanderbilt Institutional Review Board (IRB) on 26 August 2019 (IRB #191217). Vanderbilt serves as the institutional review board of record for the following study sites: Albany Medical College, Allegheny Health, Atrium Health Carolinas Medical Center, Virginia Mason Medical Center, Boston University Medical Center, Cedars-Sinai Medical Center, UT Health Lyndon B. Johnson Hospital, Medical University of South Carolina, New York-Presbyterian Queens, Stanford University, University of Pennsylvania, University of California San Diego, University of California San Francisco, University of Colorado Denver, University of Florida, University of Iowa, University of Utah, University of Washington Medical Center, University of South Florida, University of Rochester Medical Center, University of Texas Southwestern Medical Center, Virginia Commonwealth University, Lahey Hospital & Medical Center, Weill Cornell Medical Center and Northwell Health. Rush University Medical Center (approved 8 January 2020), Columbia University Medical Center (approved 28 January 2020), Northwestern University (approved 19 March 2020), Mount Carmel Health System (approved 5 May 2020) and Memorial Health University Medical Center (approved 4 April 2022) are regulated and were approved by their respective IRBs. Results from this trial will be presented at international conferences and published in peer-reviewed journals.

Trial registration number

NCT04095663.

Temperature-dependence of early development of zebrafish and the consequences for laboratory use and animal welfare

by Angelina Miller, Katja Lisa Schröder, Karsten Eike Braun, Caitlin Steindorf, Richard Ottermanns, Martina Roß-Nickoll, Henner Hollert, Thomas Backhaus

Zebrafish (Danio rerio) are widely used in biological research, but the impact of incubation temperatures on developmental endpoints is still insufficiently studied. This study quantifies developmental differences in zebrafish embryos incubated at 26°C and 28°C, focusing on key endpoints (heartbeat onset, hatching time, eye size, yolk sac consumption, and body length). For this purpose, we recorded a high-resolution time series comprising hourly observations of early developmental stages and key events and bi-hourly observations of body length until 120 hours post fertilization. Additionally, we recorded a low-resolution time series at 72, 96, and 119 hours post fertilization for detailed measurements of eye size, yolk sac area, and body length. Embryos incubated at 26°C showed consistent delays in developmental stages compared to those at 28°C, with delays becoming more pronounced at later stages. Yolk sac consumption was delayed by about 19.8 hours at 26°C by 119 hours post fertilization, suggesting a delayed onset of independent feeding. These findings suggest that time-based regulatory limits for rearing zebrafish, such as the 120-hour threshold in German regulations (TierSchVerV), do not fully account for temperature-dependent development. The results emphasize the need for guidelines linking incubation temperatures to developmental progress.

Building a library of acute traumatic spinal cord injury images across Canada: a retrospective cohort study protocol

Por: Rotem-Kohavi · N. · Humphreys · S. · Noonan · V. K. · Cheng · C. L. · Guay-Paquet · M. · Bouthillier · M. · Valosek · J. · Karthik · E. N. · Lichtenstein · E. · Guenther · N. · Ost · K. · Attabib · N. · Hardisty · M. · Badhiwala · J. · Larouche · J. · Pahuta · M. · Christie · S. · Fehlin
Introduction

MRI is increasingly recognised as a valuable tool for assessing prognosis and predicting outcomes following traumatic spinal cord injury (SCI). Several potential MRI biomarkers have been identified, but efforts are still needed to improve the accuracy and feasibility of these biomarkers in clinical practice. This study aims to build a national Canadian SCI imaging repository for storing and analysing imaging data for SCI, with the goal of improving SCI MRI biomarkers to predict outcomes and inform clinical management.

Method and analysis

As a substudy of the Rick Hansen SCI Registry (RHSCIR), this retrospective multisite study includes individuals who sustained a traumatic cervical SCI between 2015 and 2021, were previously enrolled in RHSCIR, and had MRI scans acquired within 72 hours of injury and before any surgical intervention. Individuals with a penetrating trauma and/or with any prior spine surgery are excluded. The study principal investigator and research associates, experienced with data curation and with the standardised format and specifications of the Brain Imaging Data Structure standard, guide the site’s curator on the steps to perform image deidentification and curation to create standardised datasets across all sites. These datasets are transferred to a Digital Research Alliance of Canada (‘the Alliance’) server designated for this project and concatenated to form the national Canadian SCI imaging repository (Neurogitea). We are using a semiautomated processing pipeline to quantify lesion morphology, together with additional imaging measures that are manually extracted from the images (for instance, the relative maximal spinal cord compression and the maximum canal compromise). Through linkage to RHSCIR clinical and epidemiological data already available on eligible participants, regression analysis is planned to predict neurological outcomes at discharge, including the American Spinal Injury Association Impairment Scale grade, upper and lower extremity motor and sensory scores.

Ethics and dissemination

This protocol has been submitted by the participating sites to obtain ethics and institutional approvals prior to the study initiation at each site. All 12 sites across Canada have now obtained ethics and institutional approvals. Study results will be disseminated at local, national and international conferences and by journal publications.

Using virtual twin-based AI models to detect atrial fibrillation and improve stroke outcomes [TAILOR]: a multicentre prospective cohort study

Introduction

Atrial fibrillation (AF) is the leading cause of cardioembolic stroke and is associated with increased stroke severity and fatality. Early identification of AF is essential for adequate secondary prevention but remains challenging due to its often asymptomatic or paroxysmal occurrence. Artificial intelligence (AI) offers new possibilities by integrating biomarkers, clinical phenotypes, established risk factors and imaging features to define a personalised ‘digital twin’ model. The TAILOR study aims to (1) examine prospective detection of AF using monitoring devices, (2) investigate novel prognostic MRI markers in patients with an AF-related stroke (AFRS) and (3) validate AI-based models for outcome prediction in AFRS.

Methods and analysis

This prospective multicentre observational cohort study includes patients aged 40 years and above, with neuroimaging-confirmed diagnosis of ischaemic stroke, recruited from two sites: Hospital del Mar Barcelona (Spain) and Radboud University Medical Centre (The Netherlands). For the first sub-study (n=300), patients will undergo clinical assessment at baseline, 3 months and 12 months, and patch-based or Holter cardiac monitoring. The second sub-study (n=200) involves repeated brain MRI and cognitive examination after AFRS. Finally, AI-driven ‘digital twin’ models developed on retrospective TARGET datasets will be prospectively evaluated in TAILOR using temporal and centre-stratified analyses for advanced predictive tools for AF and AFRS outcomes.

Ethics and dissemination

The TAILOR study was approved by local ethics boards in Barcelona (CPMP/ICH/135/95) and Medical Research Ethics Committee Oost-Nederland (NL86346.091.24). Patients will be included after providing informed consent. Study results will be presented in peer-reviewed journals and at global conferences.

The MenoStim Trial: Study Protocol for a Randomised, Sham-Controlled, Double-Blinded, Pilot Clinical Trial Exploring the Neurophysiological, Cognitive, Mood and Biochemical Effects Associated with Non-Invasive Brain Stimulation During the Menopause Transi

Por: Metri · N.-J. · Cavaleri · R. · Alhassani · G. · Ee · C. · Lim · C. K. · Francis · H. M. · Hochstrasser · D. · Bou Merhy · R. M. · Steiner-Lim · G. Z.
Introduction

Intermittent theta-burst stimulation (iTBS) is a non-invasive brain stimulation technique that has been shown to improve cognition and mood when applied to certain brain structures and regions. Despite research demonstrating that iTBS may have clinical utility in treating cognitive and mood changes, no study has yet been conducted to explore the potential to modulate the neurophysiological changes that can underpin cognitive and mood changes during the menopause transition. Cognitive and psychological symptoms are commonly reported by females experiencing the menopause transition, and it is thought that these symptoms arise due to various neurophysiological, metabolic and endocrinological changes. Despite being common, there is a lack of treatments available for managing these symptoms and a scarcity of data regarding the mechanisms by which they occur.

Methods and analysis

The aim of this 5-week randomised, sham-controlled, double-blinded pilot clinical trial (n=72) is to assess the underlying mechanisms of action of iTBS in females in the late menopause transition and the relationship with cognition and mood. Data will be analysed using StataTM. Normality checks will guide the choice between parametric and non-parametric tests. Generalised linear models will assess within-subject and between-subject effects across timepoints, with additional regression analyses exploring associations between biomarkers, cognition and mood. Effect sizes, CIs and relevant test statistics will be reported, with significance set at p

Ethics and dissemination

The study protocol has been reviewed and ethically approved by the Western Sydney University Human Research Ethics Committee (H16200; 8 November 2024). All participants will provide written informed consent prior to enrolment. Results from this trial will be disseminated via peer-reviewed publications and conference presentations, with findings shared in accordance with open science and data transparency principles.

ANZCTR registration number

ACTRN12625000030471, Australian New Zealand Clinical Trials Registry

Buccal fat applied to transoral robotic lateral oropharyngectomy defects to lessen radical tonsillectomy pain (BOLT): a single-centre, phase II, parallel, randomised control trial study protocol

Por: Xie · M. · de Almeida · J. · Goldstein · D. · Martino · R. · Liu · Y. F. · Allen · B. · Xu · W. · Hueniken · K. · Yao · C. M.
Introduction

Transoral robotic surgery (TORS) is a minimally invasive technique for surgical removal of tumours of the tonsil and lateral oropharynx. Surgical defects after TORS lateral oropharyngectomy are traditionally left open to heal by secondary intention, resulting in significant postoperative pain and secondarily resulting in delayed swallowing and discharge. Although multimodal analgesia can improve postoperative pain control, no studies to date have assessed the impact of adjunct surgical interventions for reducing postoperative pain after TORS. Buccal fat rotation flap is a regional reconstruction option after TORS lateral oropharyngectomy and provides immediate coverage of the open surgical wound. However, the impact of buccal fat rotation flap reconstruction on postoperative pain and swallowing remains unclear. This trial aims to compare postoperative pain outcomes in patients who undergo TORS lateral oropharyngectomy with and without buccal fat rotation reconstruction.

Methods and analysis

This protocol outlines a single centre, parallel, unblinded, phase II, randomised control trial. Inclusion criteria include adult patient (≥18 years) undergoing TORS lateral oropharyngectomy for early to intermediate stage tonsillar squamous cell carcinoma (T1-2N0-1 p16+/–) or early to intermediate stage salivary gland tumours of the palatine tonsils. Exclusion criteria include a history of prior head and neck squamous cell carcinoma, prior head and neck radiotherapy, retropharyngeal lymphadenopathy, bilateral lymphadenopathy, need for bilateral neck dissection, baseline trismus, opioid use or drug addiction, need for open surgery (transcervical lateral oropharyngectomy), free tissue transfer, or alternative regional flap, and pregnancy. All patients are planned for a TORS lateral oropharyngectomy. The intervention group will have a buccal fat rotation flap reconstruction, and the control group will be allowed to heal via secondary intention. The allocation sequence will be created using a computer-generated random sequence with a permuted block strategy. The allocation sequence will be concealed until the time of assignment. The primary outcome is postoperative pain intensity during rest and swallowing using the visualised analogue scale. Secondary outcomes include postoperative complications, other adverse events, patient-reported speech and swallowing, opioid usage, length of hospital stay, feeding tube dependence and blood glucose levels. The trial has a target sample size of 40 patients. Statistical analysis of the primary outcome will be analysed in an intention to treat analysis using a linear mixed effects model.

Ethics and dissemination

The study was approved by the University Health Network Coordinated Approval Process for Clinical Research. Study number CAPCR ID: 24-5894. All participants will be required to provide written informed consent to participate. Findings will be presented at national conferences and published in medical journals.

Trial registration number

NCT06965738.

Studying COVID-19 transmission in US state prisons using an agent-based modelling approach: a simulation study

Por: Owens · A. L. · Fliss · M. · Brinkley-Rubinstein · L.
Objectives

We aim to use an agent-based model to accurately predict the spread of COVID-19 within multiple US state prisons.

Design

We developed a semistochastic transmission model of COVID-19.

Setting

Five regional state-owned prisons within North Carolina.

Participants

Several thousand incarcerated individuals.

Primary and secondary outcome measures

We measured (1) the observed and simulated average daily infection rate of COVID-19 for each prison studied in 30-day intervals, (2) the observed and simulated average daily recovery rate from COVID-19 for each prison studied in 30-day intervals, (3) the mean absolute percentage error (MAPE) of each prison’s summary statistics and the simulated results and (4) the parameter estimates of key predictors used in the model.

Introduction

The COVID-19 pandemic disparately affected incarcerated populations in the USA, with severe morbidity and infection rates across the country. In response, many predictive models were developed to help mitigate risk. However, these models did not feature the systemic factors of prisons, such as vaccination rates, populations and capacities (to determine overcrowding) and design and were not generalisable to other prisons.

Methods

An agent-based model that used geospatial contact networks and compartmental transmission dynamics was built to create predictive microsimulations that simulated COVID-19 outbreaks within five North Carolinian regional prisons between July 2020 and June 2021. The model used the characteristics of an outbreak’s initial case size, a given facility’s capacity and its incarcerated vaccination rate as additional parameters alongside traditional susceptible-exposed-infected-recovered transmission dynamics. By fitting the model to each prison’s data using approximate Bayesian computation methods, we derived parameter estimates that reasonably modelled real-world results. These individualised estimates were then averaged to produce generalised parameter estimates for North Carolina state prisons overall.

Results

Our model had a mean average MAPE score of 23.0 across all facilities, meaning that it reasonably forecasted facilities’ average daily positive and recovery rates of COVID-19. Our model estimated an average incarcerated vaccination rate of 54% across all prisons (with a 95% CI of ±0.12). In addition, the prisons of this study were estimated to be operating at 90% of their capacity on average (95% CI ±0.16). Given the high levels of COVID-19 observed in these prisons, which averaged over one-third positive tests on respective 1-day maxima, we conclude that vaccination levels were not sufficient in curbing COVID-19 outbreaks, and high occupancy levels likely exacerbated the spread of COVID-19 within prisons.

In addition, data gaps in facilities without recorded daily testing resulted in poor spread predictions, demonstrating how important consistent data release practices are in incarcerated settings for accurate tracking and prediction of outbreaks.

Conclusion

The findings of this study better quantify how spatial contact networks and facility-level characteristics unique to congregate living facilities can be used to predict infectious disease spread. Our approach also highlights the need for increased vaccination efforts and potential capacity reductions to mitigate COVID-19 transmission in prisons.

Redirecting patients from the pediatric emergency department to community locations for care: A qualitative study of healthcare professional and leader perspectives

by Erica Qureshi, Quynh Doan, Jessica Moe, Steven P. Miller, Garth Meckler, Brett Burstein, Jehannine (J9) Austin

Objectives

Emergency department (ED) to community (ED2C) programs, which redirect patients from the pediatric ED to community healthcare professionals represent a promising strategy to reduce the impact of non-urgent visits on the pediatric ED. Given an ED2C program’s potential impact on various care professionals, we completed a qualitative study to explore key informants’ attitudes and perceptions of pediatric ED2C programs.

Methods

We conducted one-on-one semi-structured interviews with key informants in British Columbia, Canada. Participants included: pediatric ED staff – triage nurses and physicians; community professionals – pediatricians and family physicians; and health system leaders responsible for pediatric and emergency care in British Columbia. Interviews were recorded, transcribed verbatim, de-identified, and analyzed using reflexive thematic analysis within an interpretive description framework. A visual model was developed to depict key themes in attitudes and perceptions towards pediatric ED2C programs.

Results

We interviewed 24 participants: 6 community professionals, 11 pediatric ED professionals, and 7 healthcare leaders. Participants viewed the ED2C program as a valuable solution to address pediatric system strain provided that systemic barriers are addressed, and both emergency and community settings are equipped with adequate training and resources. Participants emphasized the need for clear guidelines on eligibility and operations to build confidence and enhance program effectiveness.

Conclusions

Our findings suggest there is support for ED2C programs as a means to reduce the impact of non-urgent pediatric ED visits and strengthen community-based care. Successful implementation will require coordinated planning, resource investment, and clear operational frameworks.

How can midwives in Germany be supported in advising on early childhood allergy prevention in a health literacy-responsive way? Protocol for a mixed-methods study to co-design and evaluate an educational intervention following the Medical Research Council

Por: von Sommoggy · J. · Steinmann · J. R. · Lander · J. · Bitzer · E. M. · Pawellek · M. · Brandstetter · S. · Apfelbacher · C. · Fillenberg · B. D.
Introduction

Health literacy (HL) is essential for making informed health-related decisions, for example enabling parents to reduce their child’s allergy risk. Health literacy does not, however, rely solely on an individual’s capacities, but is strongly influenced by external factors. Midwives provide important health advice to families, particularly since their relationship is close during a time of significant transition. This offers them a unique opportunity to positively influence the HL of parents, which in turn may support the health and well-being of the whole family. The aim of this study is to develop and evaluate an intervention that can support midwives in providing allergy prevention advice in a way that is in line with the concept of HL.

Methods and analysis

In accordance with the recommendations of the Medical Research Council framework in the first phase of this study, we will survey midwives (target sample size=379) in Germany regarding their practices, the potential barriers they face and enabling factors in providing advice on early childhood allergy prevention in an HL-responsive way. The data will be subjected to descriptive statistical analysis. Two co-design workshops will then be conducted with various stakeholders in two regions (Rhineland-Palatinate and Saxony) of Germany. Following the protocol proposed by the Stanford Design Thinking School, we will use design thinking to collect ideas for the intervention. Based on these ideas and our previous qualitative and quantitative study, we will develop an intervention in collaboration with didactic experts. The intervention will be piloted in three groups (midwives=10–15, midwives working as practice supervisors=5–10, students of midwifery=10–20). For the process evaluation, we will use observation protocols of the intervention conduct and qualitative interviews. For the outcome evaluation, we will use a questionnaire and observations in simulation laboratories with students of midwifery.

Ethics and dissemination

This study protocol was approved by the Ethics Committee of the University of Regensburg (ID 23-3441-101) and is in compliance with the Declaration of Helsinki. Participation in the study will only be possible after informed consent has been given. Our results will be presented at national and international conferences and published in scientific journals. Additionally, once it has been finalised, we will make the intervention available to educational institutions for (future) midwives.

Physical activity and psychosocial characteristics of individuals with and without chronic low back pain in daily life: protocol for the PRIA intensive longitudinal study

Por: Kolodziejczak-Krupp · K. · Zipper · V. · Wilhelm · L. O. · Thiel · L. · Stein · C. · Schäfer · T. · Pumberger · M. · Schmidt · H. · Fleig · L.
Introduction

Despite the high prevalence of chronic low back pain (cLBP), its underlying mechanisms remain poorly understood. Addressing modifiable psychosocial resources and health behaviours such as physical activity offers a promising avenue for reducing the impact of cLBP. Furthermore, although the relationship between physical activity and pain is theorised as a within-person process, previous research has primarily focused on between-person differences. In this article, we present the protocol for the prospective observational study PRIA (Psychologie und Rückengesundheit im Alltag), which is part of a larger interdisciplinary research consortium investigating preventive, diagnostic and therapeutic aspects of cLBP. Drawing on theories from health and pain psychology, the outlined study examines the interplay between different dimensions of cLBP and back health, physical activity and their psychosocial determinants within individuals in their everyday lives.

Methods and analysis

This prospective longitudinal study combines online questionnaires with ecological momentary assessment of health behaviours, cognitions, affect, social support and pain using a smartphone-based app (movisensXS) and continuous measurement of physical activity by accelerometry (movisens Move 4). Parameters will be recorded at baseline (T0), daily for the following 14 days (five times per day at 09:00, 12:00, 15:00, 18:00 and 21:00, resulting in up to 70 measurement occasions), 3 and 6 months later (T1 and T2). A total of 230 participants (115 individuals with cLBP and 115 without cLBP) aged 18–64 years will be enrolled. The associations between cLBP and the measured parameters will be examined using multilevel models.

Ethics and dissemination

The university’s ethics committee at the MSB Medical School Berlin approved the study on 8 March 2021 (approval number MSB-2021/59, amendment approved on 10 November 2023, amendment number MSB-2023/145). Ethical approval for the FOR 5177 initial screening was granted by Charité – Universitätsmedizin Berlin (EA1/058/21). All participants provided written informed consent. The results of this research will be published in peer-reviewed international journals, presented at national and international conferences, and reported to the German Research Foundation.

Trial registration number

DRKS00032978.

Hormonal contraception and the risk of suicidal behaviour: a Swedish nationwide register-based study

Por: Aleknaviciute · J. · Lu · D. · Gotby · V. · Frans · E. M. · Kuja-Halkola · R. · Engberg · H. · Tiemeier · H. · Lichtenstein · P. · Fang · F. · Kushner · S. A. · Chang · Z.
Objectives

To determine whether hormonal contraceptives are associated with subsequent risks of suicidal behaviour and depression among women of reproductive age.

Design

Nationwide register-based study.

Setting

Swedish national population using health and death registers. Nationwide registries provided individual-level information about the use of hormonal contraception, suicidal behaviour, depression and potential confounders.

Participants

All women in Sweden from 1 January 2006 to 31 December 2013.

Outcomes measures

Suicidal behaviour events or registered deaths due to suicide were identified through the National Patient Register and Cause of Death Register, respectively. Clinical diagnoses of depression were obtained from the patient register. Cox regression models were used to estimate HRs with 95% CIs of suicidal behaviour and depression in women using hormonal contraceptives.

Results

We followed more than two million women for a median of 6.8 years (12.4 million person-years in total). No increased risk was observed among women using oral contraceptives or non-oral combined oestrogen/progestin formulations. Non-oral progestin-only contraceptives were associated with an increased risk of suicidal behaviour using both population-based (HR=1.17, 95% CI 1.13 to 1.21) and within-individual (HR=1.16, 95% CI 1.11 to 1.21) analyses. Age-stratified analyses revealed that during late adolescence (age 15–18), use of oral contraceptives or non-oral combined formulations was associated with an increased risk of suicidal behaviour (range of HRs: 1.09–1.35), an effect that was not observed in adulthood. In contrast, non-oral progestin-only contraceptives were associated with an increased risk of suicidal behaviour during both late adolescence and adulthood.

Conclusions

We found no overall increased risk of suicidal behaviour among women using oral contraceptives or non-oral combined formulations. However, the observed increased risk associated with hormonal contraceptive use during adolescence, as well as with non-oral progestin-only contraception—particularly gonane-containing formulations—across the entire reproductive window warrants attention and further investigation.

Design, 3D printing, and preclinical validation of an extraglottic ramp to facilitate blind orotracheal intubation in emergency airway management

by Jorman H. Tejada-Perdomo, Valentina Gutierrez-Perdomo, Juana V. Agudelo-Castro, Jorge A. Pérez-Gamboa, Alejandro Weinstein, Sebastián San Martín, Rodrigo Salas, Jorge A. Ramos-Castaneda

The use of devices that facilitate rapid airway isolation is essential when managing critical patients in emergencies. In recent years, additive manufacturing has emerged as an innovative, versatile, and accessible technology for developing medical devices. This study presents the design, development, and validation of an extraglottic medical device created using computer-aided design tools and stereolithographic 3D printing to facilitate blind intubation by first responders. The device was iteratively modeled and fabricated with biocompatible materials; validation in airway simulators and human cadaveric specimens assessed dimensions, friction, intubation technique, and learning curve, and ease of use was rated with a Likert scale. Ten iterations led to a final design with low friction and minimal cervical manipulation; ramp angle, cup geometry, and distal tip were optimized for tube passage, and BioMed Flex 80A showed high strength and anatomical compatibility. The final version is a safe, reusable, and functional alternative for airway management and blind orotracheal intubation, particularly in emergencies and resource-limited settings; clinical validation in live patients is still needed.

Evaluating adherence to patient registration paperwork guidelines: a mystery shopper study in English primary care

Por: Hodson · N. · Onyeaso · O. O. · Mills · S. · Sunstein · C. R. · Bruine de Bruin · W.
Objective

To evaluate adherence to National Health Service (NHS) patient registration ID guidelines among General Practitioners’ (GP) practices.

Design

A mystery shopper study, including website reviews and phone calls.

Setting

Rural and urban parts of the United Kingdom’s West Midlands.

Participants

85 randomly selected GP practices.

Primary and secondary outcome measures

In January–April 2024, GP’s websites were reviewed before phone calls in which our ‘mystery shopper’ was asked to register without photo ID and proof of address.

Results

Of 85 GP practices, 60 (71%) breached NHS guidance either online or over the phone, with only 25 (29%) consistently following NHS guidance. Phone calls to rural (vs urban) GP practices were more likely to yield refusal of registration without photo ID and proof of address, despite rural (vs urban) GP practices making similar statements online. During some phone calls, practices sought to negotiate a compromise by requesting less robust ‘documentation’, such as an addressed parcel.

Conclusions

GP practices commonly refuse registration to people without photo ID or proof of address, thus creating ‘sludge’ and undermining access to healthcare especially for poor, vulnerable patients, including immigrants. Changing GP practices’ websites would not address this problem if erroneous information is still provided over the phone. GPs and practice managers should ensure that all staff follow NHS guidance to allow registration without these documents.

Protective and risk factors for eating disorders: protocol for a prospective cohort study of children at familial high risk (BLOOM)

Por: Jorgensen · M. S. · Schousboe · A. · Pappaianni · E. · Steinstad · L. · Eisemann · C. · Klitgard · M. · Micali · N.
Introduction

The aetiology of eating disorders (EDs) is complex, involving an interplay of genetic and environmental factors. Children at familial high risk (FHR) for EDs demonstrate increased risk of developing EDs themselves compared with children born to parents without EDs, though the majority remain unaffected. The BLOOM study is an FHR study that aims to identify biological, neurocognitive and psychosocial risk and protective pathways to EDs. Results of this study will help identify trait markers of EDs, inform targeted preventive intervention strategies and clarify how to mitigate genetic risk of EDs.

Methods and analysis

This prospective cohort study will enrol 510 children aged 8–10 years, including 360 at FHR for developing EDs (comprising 120 children each from mothers with anorexia nervosa, bulimia nervosa and binge ED) and 150 children not at FHR. Participants will be recruited over 2 years and followed up every 2 years. Data collection will include dual X-ray absorptiometry scans to evaluate body composition, saliva samples for genotyping, neurocognitive testing, self and parent-reported questionnaires and semistructured diagnostic interviews of psychopathology and well-being. Optional data collection will include fasting blood samples, stool samples and brain MRI scans. Mothers and secondary caregivers will complete questionnaires regarding family functioning and their mental health.

Ethics and dissemination

The study has been approved by the Danish Data Protection Agency (p-2023-14826) and the Regional Ethics Committee of Health Research of the Capital Region of Denmark (H-23043100). Written consent will be obtained from all participants. Results will be disseminated at scientific conferences, in peer-reviewed publications, PhD dissertations and to relevant stakeholders.

Gender and age differences in hand disinfection behaviour during the COVID-19 pandemic: field data from Swiss retail stores

Por: von Bieberstein · F. · Kulle · A.-C. · Schumacher · S.
Objectives

To inform about behavioural gender and age differences in compliance with hand hygiene recommendations during the COVID-19 pandemic in Switzerland.

Design

Observational study (24–25 June and 1–3 July 2020); validation study (4 December 2020); gender and age group estimated by observers.

Setting

Observations occurred in five supermarkets.

Participants

All customers entering the supermarkets during a 3-hour period per day (n=8245 main study) and during 1 day (n=1918 validation study).

Main outcome measures

We observed whether people disinfected their hands.

Results

The study reveals considerable differences with respect to gender and age: For women, 58.7% (95% CI 57.3 to 60.0%) were disinfecting their hands vs 50.4% (95% CI 48.6 to 52.2%) of men. With respect to age, we identified a steep increase across age groups up to the age of 60 years and older with 35.5% (95% CI 30.7 to 40.5%) of youth (12-17 yrs) disinfecting their hands, 50.5% (95% CI 49.1 to 51.9%) of adults (18-59 yrs) vs 69.0% (95% CI 67.1 to 70.9%) of the golden age group (60-74 yrs) and 67.2% (95% CI 61.1 to 72.9%) of people older than 75 years. The validation study confirmed these differences.

Conclusions

The study documents substantial differences in hand hygiene compliance between gender and age groups. This should be considered in the design of protective measures to ensure clean and safe hands.

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