bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development and validation of a life expectancy estimator for multimorbid older adults: a cohort study protocol
Authors: Gastens Viktoria , Del Giovane Cinzia , Anker Daniela , Feller Martin , Syrogiannouli Lamprini , Schwab Nathalie , Bauer Douglas C , Rodondi Nicolas , Chiolero Arnaud 
Published: August 2021

BackgroundOlder multimorbid adults have a high risk of mortality and a short life expectancy (LE). Providing high-value care and avoiding care overuse, including of preventive care, is a serious challenge among multimorbid patients. While guidelines recommend to tailor preventive care according to the estimated LE, there is no tool to estimate LE in this specific population. Our objective is therefore to develop an LE estimator for older multimorbid adults by transforming a mortality prognostic index, which will be developed and internally validated in a prospective cohort.Methods and analysisWe will analyse data of the Optimising Therapy to Prevent Avoidable Hospital Admissions in Multimorbid Older People cohort study in Bern, Switzerland. 822 participants were included at hospitalisation with age of 70 years or older, multimorbidity (three or more chronic medical conditions) and polypharmacy (use of five drugs or more for>30 days). All-cause mortality will be assessed during 3 years of follow-up. We will apply a flexible parametric survival model with backward stepwise selection to identify the mortality risk predictors. The model will be internally validated using bootstrapping techniques. We will derive a point-based risk score from the regression coefficients. We will transform the 3-year mortality prognostic index into an LE estimator using the Gompertz survival function. We will perform a qualitative assessment of the clinical usability of the LE estimator and its application. We will conduct the development and validation of the mortality prognostic index following the Prognosis Research Strategy (PROGRESS) framework and report it following the Transparent Reporting of a Multivariable Prediction Model for Individual Prognosis or Diagnosis (TRIPOD) statement.Ethics and disseminationWritten informed consent by patients themselves or, in the case of cognitive impairment, by a legal representative, was required before enrolment. The local ethics committee (Kantonale Ethikkommission Bern) has approved the study. We plan to publish the results in peer-reviewed journals and present them at national and international conferences.
eHBB: a randomised controlled trial of virtual reality or video for neonatal resuscitation refresher training in healthcare workers in resource-scarce settings
Authors: Umoren Rachel , Bucher Sherri , Hippe Daniel S , Ezenwa Beatrice Nkolika , Fajolu Iretiola Bamikeolu , Okwako Felicitas M , Feltner John , Nafula Mary , Musale Annet , Olawuyi Olubukola A , Adeboboye Christianah O , Asangansi Ime , Paton Chris , Purkayastha Saptarshi , Ezeaka Chinyere Veronica , Esamai Fabian 
Published: August 2021

ObjectiveTo assess the impact of mobile virtual reality (VR) simulations using electronic Helping Babies Breathe (eHBB) or video for the maintenance of neonatal resuscitation skills in healthcare workers in resource-scarce settings.DesignRandomised controlled trial with 6-month follow-up (2018–2020).SettingSecondary and tertiary healthcare facilities.Participants274 nurses and midwives assigned to labour and delivery, operating room and newborn care units were recruited from 20 healthcare facilities in Nigeria and Kenya and randomised to one of three groups: VR (eHBB+digital guide), video (video+digital guide) or control (digital guide only) groups before an in-person HBB course.Intervention(s)eHBB VR simulation or neonatal resuscitation video.Main outcome(s)Healthcare worker neonatal resuscitation skills using standardised checklists in a simulated setting at 1 month, 3 months and 6 months.ResultsNeonatal resuscitation skills pass rates were similar among the groups at 6-month follow-up for bag-and-mask ventilation (BMV) skills check (VR 28%, video 25%, control 22%, p=0.71), objective structured clinical examination (OSCE) A (VR 76%, video 76%, control 72%, p=0.78) and OSCE B (VR 62%, video 60%, control 49%, p=0.18). Relative to the immediate postcourse assessments, there was greater retention of BMV skills at 6 months in the VR group (−15% VR, p=0.10; −21% video, p<0.01, –27% control, p=0.001). OSCE B pass rates in the VR group were numerically higher at 3 months (+4%, p=0.64) and 6 months (+3%, p=0.74) and lower in the video (−21% at 3 months, p<0.001; −14% at 6 months, p=0.066) and control groups (−7% at 3 months, p=0.43; −14% at 6 months, p=0.10). On follow-up survey, 95% (n=65) of respondents in the VR group and 98% (n=82) in the video group would use their assigned intervention again.ConclusioneHBB VR training was highly acceptable to healthcare workers in low-income to middle-income countries and may provide additional support for neonatal resuscitation skills retention compared with other digital interventions.
Analysis of high-intensity care in intensive care units and its cost at the end of life among older people in South Korea between 2016 and 2019: a cross-sectional study of the health insurance review and assessment service national patient sample database
Authors: Lee Yunji , Jo Minjeong , Kim Taehwa , Yun Kyoungsun 
Published: August 2021

ObjectivesTo provide useful information for clinicians and policy makers to prepare guidelines for adequate use of medical resources during end-of-life period by analysing the intensive care use and related costs at the end of life in South Korea.DesignCross-sectional, retrospective, observational study.SettingTertiary hospitals in South Korea.ParticipantsWe analysed claim data and patient information from the Health Insurance Review and Assessment Service national dataset. This dataset included 19 119 older adults aged 65 years or above who received high-intensity care at least once and died in the intensive care unit in South Korea between 2016 and 2019. High-intensity care was defined as one of the following treatments or procedures: cardiopulmonary resuscitation, mechanical ventilation, extra-corporeal membrane oxygenation, haemodialysis, transfusion, chemotherapy and vasopressors.Primary and secondary outcome measuresUsage and cost of high-intensity care.ResultsThe most commonly used high-intensity care was transfusion (68.9%), mechanical ventilation (50.6%) and haemodialysis (35.7%) during the study period. The annual cost of high-intensity care at the end of life increased steadily from 2016 to 2019. There existed differences by age, gender, length of hospital stays and primary cause of death in use of high-intensity care and associated costs.ConclusionFindings indicate that invasive and device-dependent high-intensity care is frequently provided at the end of life among older adults, which could potentially place an economic burden on patients and their families. In Korea’s ageing society, increased rates of chronic illness are expected to significantly burden those who lack the financial resources to provide end-of-life care. Therefore, guidelines for the use of high-intensity care are required to ensure affordable end-of-life care.
Factors influencing the effectiveness of remote patient monitoring interventions: a realist review
Authors: Thomas Emma E , Taylor Monica L , Banbury Annie , Snoswell Centaine L , Haydon Helen M , Gallegos Rejas Victor M , Smith Anthony C , Caffery Liam J 
Published: August 2021

ObjectivesOur recent systematic review determined that remote patient monitoring (RPM) interventions can reduce acute care use. However, effectiveness varied within and between populations. Clinicians, researchers, and policymakers require more than evidence of effect; they need guidance on how best to design and implement RPM interventions. Therefore, this study aimed to explore these results further to (1) identify factors of RPM interventions that relate to increased and decreased acute care use and (2) develop recommendations for future RPM interventions.DesignRealist review—a qualitative systematic review method which aims to identify and explain why intervention results vary in different situations. We analysed secondarily 91 studies included in our previous systematic review that reported on RPM interventions and the impact on acute care use. Online databases PubMed, EMBASE and CINAHL were searched in October 2020. Included studies were published in English during 2015–2020 and used RPM to monitor an individual’s biometric data (eg, heart rate, blood pressure) from a distance.Primary and secondary outcome measuresContextual factors and potential mechanisms that led to variation in acute care use (hospitalisations, length of stay or emergency department presentations).ResultsAcross a range of RPM interventions 31 factors emerged that impact the effectiveness of RPM innovations on acute care use. These were synthesised into six theories of intervention success: (1) targeting populations at high risk; (2) accurately detecting a decline in health; (3) providing responsive and timely care; (4) personalising care; (5) enhancing self-management, and (6) ensuring collaborative and coordinated care.ConclusionWhile RPM interventions are complex, if they are designed with patients, providers and the implementation setting in mind and incorporate the key variables identified within this review, it is more likely that they will be effective at reducing acute hospital events.PROSPERO registration numberCRD42020142523.
Study on acupuncture in the treatment of painful diabetic peripheral neuropathy based on rs-fMRI: a protocol for systematic review and meta-analysis
Authors: Li Mengyuan , Yao Lin , Huang Haipeng , Zheng Haizhu , Cao Jiazhen , Wang Guan , Liu Yanze , Wang Hongfeng 
Published: August 2021

IntroductionStudies have shown that acupuncture has significant therapeutic effects on painful diabetic peripheral neuropathy (PDPN) yet the precise mechanism of action underpinning these effects remains controversial. Resting-state functional MRI (rs-fMRI) is an advanced imaging technique that can be used to monitor changes in the activity of the brain, particularly in PDPN. However, the data from several studies remain inconclusive and there is currently no systematic review and meta-analysis for the use of rs-fMRI in PDPN.Methods and analysisIn this study, we will select all eligible studies published on or before 30 June 2021. Four English and four Chinese databases will be searched, specifically, PubMed, Embase, Web of Science, Cochrane Library, China National Knowledge Infrastructure, WanFang database, China Science Technology Journal Database (VIP) and China Doctor/Master Dissertations Full-text Database. Only clinical trials and the first cycle of a cross-over trial linked to acupuncture for PDPN will be included in the analysis. The main outcomes include the amplitude of low-frequency fluctuation, regional homogeneity, functional connectivity of the brain, bilateral superficial peroneal nerve sensory nerve conduction velocity, bilateral dorsal current perception threshold values and the degree of subjective pain. The secondary outcomes include biochemical indicators, the degree of depression and anxiety and changes in efficiency. The study selection, data extraction and risk of bias assessment will be performed by two investigators. For statistical analyses, Review Manager V.5.4 software will be used. If necessary, heterogeneity testing, data synthesis, and subgroup analysis will be performed.Ethics and disseminationOur systematic review and meta-analysis will be based on published literature for data extraction and will not include the use of individual patient data and so no ethical approval required.PROSPERO registration numberCRD42021211644.
Improving physician compliance with mammography screening by implementing a breast cancer screening guideline at a hospital in Bahrain
Authors: Abou leila Rabih Mustapha , Shannon Michael , El-Nigoumi Sarah El-Nassir 
Published: August 2021

BackgroundFrom a health and safety perspective, it is critical to use adequate, evidence-based breast screening guidelines. The aim of this quality improvement project was to improve physicians’ compliance with breast cancer screening guidelines to enhance the mammography screening rate among eligible women; this was achieved through the implementation of multifaceted changes to the hospital’s processes and the improvement of physicians’ attitudes towards the guidelines.MethodsThe project used the Plan-Do-Study-Act method to implement the changes. This was a pre-post evaluation study. The data were collected from patients’ charts. The primary outcome of interest was the rate of physician compliance with mammography screening guidelines before and after the implementation of the process changes. A literature review was conducted to determine which women should be identified as eligible for mammography screening.InterventionThe interventions targeted physician knowledge and hospital processes. Improving doctors’ expertise was achieved by implementing the US Preventive Service Task Force recommendation for mammography screening every 2 years for women aged 50–74 years. The process modifications included the establishment of a system that would be effective in identifying at-risk patients and reminding physicians at the point of care.ResultsOver the course of this study, 825 patients met the criteria for breast cancer screening. The rate of physician compliance with the breast cancer screening guideline increased from 2% to 69% after 23 weeks, and the control charts demonstrated a reliable process.ConclusionThis project examined the relationship between different interventions (identification of the eligible patient, reminder alerts and physician knowledge) and physician compliance with mammography screening guidelines. The results suggest a positive link between the study variables and physicians’ compliance with mammography screening guidelines.
Impact evaluation of immunisation service integration to nutrition programmes and paediatric outpatient departments of primary healthcare centres in Rumbek East and Rumbek Centre counties of South Sudan
Authors: Idris Israel Oluwaseyidayo , Obwoya Justin Geno , Tapkigen Janet , Lamidi Serifu Ayobami , Ochagu Victor A , Abbas Kaja 
Published: August 2021

ObjectiveTo evaluate the impact of immunisation service integration to nutrition programmes and under 5-year-old paediatric outpatient departments of primary healthcare centres in Rumbek East and Rumbek Centre counties of South Sudan.DesignRetrospective intervention study.SettingThree primary healthcare centres in Rumbek East county and three primary healthcare centres in Rumbek Centre county of Lakes state in South Sudan.ParticipantWe extracted the data for the uptake of pentavalent vaccine (first, second and third dose) given to children aged between 6 weeks and 23 months from immunisation records for January–June 2019 before immunisation service integration and July–December 2019 after immunisation service integration from the District Health Information System 2 website to estimate the immunisation uptake ratios and drop-out rates.ResultsThe uptake of the first dose of the pentavalent vaccine improved from 61% to 96% (p<0.001) after immunisation service integration into the nutrition programmes of the primary healthcare centres in Rumbek Centre county. The uptake of the second pentavalent dose improved from 37% to 69% (p<0.001) and for the third pentavalent dose from 36% to 62% (p<0.001), while the drop-out rate reduced from 57% to 40% (p<0.001). While in Rumbek East county, the uptake of the first dose of the pentavalent vaccine improved from 55% to 77% (p<0.001) after immunisation service integration into the under 5-year-old paediatric outpatient departments. The uptake of the second dose improved from 36% to 62% (p<0.001) and for the third dose from 44% to 63% (p<0.001), while the drop-out rate reduced from 40% to 28% (p<0.001). Children were 23% more likely (RR 1.23, 95% CI 1.12 to 1.36, p<0.001) to be immunised with the first dose of the pentavalent vaccine on immunisation service integration into the nutrition programmes of primary healthcare centres of Rumbek Centre county in comparison to integration into under 5-year-old outpatient departments of Rumbek East county.ConclusionIntegration of immunisation service delivery to nutrition sites and children’s outpatient departments improved the immunisation coverage and decreased drop-out rates in the Rumbek East and Rumbek Centre counties of South Sudan. This evidence of positive impact should encourage the stakeholders of the Expanded Programme on Immunisation to focus on the sustainability and scale-up of this intervention to other counties in South Sudan, as logistically as possible.
NK cells enhance CAR-T cell antitumor efficacy by enhancing immune/tumor cells cluster formation and improving CAR-T cell fitness
Authors: Bachiller Mireia , Perez-Amill Lorena , Battram Anthony Matthew , Carné Sebastian Ciro , Najjar Amer , Verhoeyen Els , Juan Manel , Urbano-Ispizua Alvaro , Martin-Antonio Beatriz 
Published: August 2021

BackgroundChimeric antigen receptor (CAR)-T cell immunotherapy has modified the concept of treatment in hematological malignancies. In comparison with pediatric patients, where responses are maintained over many years, older patients, such as those with non-Hodgkin’s lymphoma (NHL) and multiple myeloma (MM), present lower persistence of CAR-T cells that might be due to decreased fitness of T cells acquired with aging. Moreover, cord blood derived-NK cells (CB-NKs) and CAR-NK cells derived from CB-NK can be used ‘off-the-shelf’ as immune cells with antitumor properties for the treatment of cancer patients. However, to date, clinical studies have only demonstrated the safety of these therapies but not optimal efficacy. To confront the shortcomings of each therapy, we devised a novel approach consisting of simultaneous (CAR-)NK cell and CAR-T cell administration. In this setting, NK cells demonstrate an important immunoregulation of T cells that could be exploited to enhance the efficacy of CAR-T cells.MethodsA combinatorial treatment based on either CAR-T and CAR-NK cells or CB-NK and CAR-T cells in two models of NHL and MM was performed. Antitumor efficacy was analyzed in vitro and in vivo, and parameters related to early activation, exhaustion and senescence of T cells were analyzed.ResultsWe show that CAR-NK cells derived from CB-NK are only effective at high doses (high E:T ratio) and that their activity rapidly decreases over time in comparison with CAR-T cells. In comparison and to exploit the potential of ‘off-the-shelf’ CB-NK, we demonstrate that a low number of CB-NK in the CAR-T cell product promotes an early activation of CAR-T cells and their migration to MM cells leading to enhanced anti-MM efficacy. Moreover, cytokines related to CRS development were not increased, and importantly, CB-NK enhanced the fitness of both CARposand CARnegT cells, promoting lower levels of exhaustion and senescence.ConclusionThis study demonstrates a relevant immunoregulatory role of CB-NK collaborating with CAR-T cells to enhance their antitumor activity. A novel and different approach to consider in CAR-T cell immunotherapy studies is presented here with the goal to enhance the efficacy of the treatment.
Comorbidity and healthcare utilisation in persons with incident systemic lupus erythematosus followed for 3 years after diagnosis: analysis of a claims data cohort
Authors: Albrecht Katinka , Redeker Imke , Aringer Martin , Marschall Ursula , Strangfeld Anja , Callhoff Johanna 
Published: August 2021

ObjectiveTo analyse comorbidity and healthcare utilisation in individuals with SLE.MethodsA cohort of individuals with incident SLE diagnosis in 2016 were investigated using claims data from a German statutory health insurance fund. Concomitant diagnoses, medical prescriptions, hospitalisation and sick leave were analysed in the year prior to diagnosis and during a 3-year follow-up in comparison with age-matched and sex-matched controls (1) without autoimmune diseases and (2) with incident diabetes mellitus. Sensitivity analyses were performed excluding cases with additional autoimmune diagnoses and without prescription of antimalarials.ResultsAmong 571 individuals with SLE, hypertension (48%), depression (30%), hyperlipidaemia (25%), osteoarthritis (25%) and osteoporosis (20%) were the most frequent comorbidities in 2016. Cerebrovascular disease was documented in 9.6%. The number of drugs (mean 9.6, ∆+6.2), hospitalisation (40%, ∆+27%) and days on sick leave (median 46 days, ∆+27 days) increased significantly in the first year with SLE diagnosis. Individuals with SLE were more frequently hospitalised and had more medications compared with both control groups (all p<0.001). The increase in comorbidity diagnoses was low in controls without autoimmune diseases, while controls with diabetes showed a more pronounced increase in cardiovascular risk factors, but less in osteoporosis and cerebrovascular disease. Sensitivity analyses showed comparable results.ConclusionComorbidities are frequently detected at the time of diagnosis of SLE. High numbers of drug prescriptions and hospitalisation following SLE diagnosis reflect the comprehensive disease burden. The comparison with incident diabetes shows that differences with controls without autoimmune disease are overestimated by detection bias.
Complexity of virtual multistrings
Authors: Freund David 
Published: August 2021

A virtual [Formula: see text]-string [Formula: see text] consists of a closed, oriented surface [Formula: see text] and a collection [Formula: see text] of [Formula: see text] oriented, closed curves immersed in [Formula: see text]. We consider virtual [Formula: see text]-strings up to virtual homotopy, i.e. stabilizations, destabilizations, stable homeomorphism, and homotopy. Recently, Cahn proved that any virtual [Formula: see text]-string can be virtually homotoped to a minimally filling and crossing-minimal representative by monotonically decreasing both genus and the number of self-intersections. We generalize her result to the case of non-parallel virtual [Formula: see text]-strings. Cahn also proved that any two crossing-irreducible representatives of a virtual [Formula: see text]-string are related by isotopy, Type 3 moves, stabilizations, destabilizations, and stable homeomorphism. Kadokami claimed that this held for virtual [Formula: see text]-strings in general, but Gibson found a counterexample for [Formula: see text]-strings. We show that Kadokami’s statement holds for non-parallel [Formula: see text]-strings and exhibit a counterexample for general virtual [Formula: see text]-strings.