Conectar
Surgical site infection (SSI) following transmetatarsal amputation (TMA) is common and associated with significant morbidity. However, there is limited evidence to guide perioperative strategies for SSI prevention in this population. A prospective, cross-sectional survey was conducted among vascular specialists. The questionnaire assessed current practice in SSI prevention for TMA, perceptions of evidence gaps, and willingness to participate in future research. Responses were analysed descriptively. Eighty-four valid responses were analysed, with 64.3% from consultant vascular surgeons and 84.5% from UK centres. Most respondents (84.5%) considered SSI after TMA to be a significant issue. The majority preferred primary closure in clean wounds (78.6%) and commonly used short-course antibiotics and interrupted sutures. Over 70% agreed no clear best practice exists, and 65.5% felt high-quality randomised trials are needed. Ninety-three percent expressed willingness to engage in future studies. Equipoise existed regarding interventions including antibiotic duration, wound adjuncts, and closure techniques. Opinion varied regarding whether TMA and major lower limb amputation should be pooled when undertaking research into SSI prevention. Current practice in SSI prevention for TMA is highly variable. This survey demonstrates broad support for rigorous trials to establish effective strategies and highlights the feasibility of future research in this area.
Despite numerous therapeutic approaches, the inhibition of hypertrophic scar formation remains a major challenge. Adipose-derived stem cells (ADSCs) have been shown to improve wound healing, including remodelling, in vivo. A systematic review was conducted using the electronic databases PubMed, Web of Science, Embase and Medline. The basic research question was formulated with the PICO framework. The aim of this review is to prove the role of ADSCs in the prevention of hypertrophic scar formation based on in vivo studies. Improved macroscopic outcomes with the use of ADSCs have been shown in nine of 10 studies included. Eight studies report inhibition on fibroblast activation, while all studies highlight the efficacy in promoting the extracellular matrix deposition and remodelling process. The immunomodulatory effects of ADSCs during inflammation have been demonstrated in six studies. One study each investigated the effect on adipogenesis or angiogenesis. In all studies the role of ADSCs in the prevention of hypertrophic scarring was conclusive. However, due to their heterogeneity and weighting of disparate outcomes, several investigations only converged upon distinct endpoints. Further research, preferably in pigs, is urgently required in order to assess the role of ADSCs in the prevention of hypertrophic scar.
To examine survivors' experiences of discharge information including risk communication after hospitalisation for a stroke and the characteristics associated with receiving information in accordance with their preferences.
With advances in acute stroke care and an ageing population, the number of survivors of stroke is increasing. It is important that healthcare providers ensure patients have adequate information after a stroke-related hospitalisation.
Cross-sectional study.
Adults recently discharged after a stroke from eight Australian hospitals were mailed a survey. Items examined risk and discharge care information, with participants asked to indicate both their preferences for and receipt of the information. Concordance with preferences was calculated, and characteristics associated with information preference concordance were assessed with binomial logistic regression. Study reported in accordance with STROBE Checklist.
Of 1161 eligible patients invited, 403 (35%) completed the survey. All items were endorsed by 80% or more of respondents as being wanted. However, for all items, fewer respondents reported the care as received. Only 28% of participants received information on all five items according to their preferences. Hospital site, Body Mass Index and age were statistically significantly associated with participants receiving information in accordance with their preferences.
Most participants indicated a preference to receive recommended discharge information. Findings suggest that patients may benefit from increased information provision prior to hospital discharge after stroke.
Nurses have an important role in the provision of stroke care and information. The findings of this study may be used to improve the provision of post-hospital discharge care and support for survivors of stroke, and assist in identifying patients at lower odds of experiencing information aligned with their preferences and who may benefit from support.
Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist for cross-sectional studies.
No patient or public contribution.
To explore how community-dwelling older adults with multimorbidity experience, enact and navigate daily self-care using the Caring Life-Course Theory to identify opportunities for strengthening self-care and self-management support.
Qualitative descriptive study.
Semi-structured interviews were conducted with community-dwelling older adults aged ≥ 50 years living with two or more chronic conditions across three Australian states and territories. Data were analysed inductively and deductively using qualitative content analysis. Inductive coding was followed by theory-informed analysis to interpret self-care capability, capacity, care networks and system supports.
Eighteen participants (mean age = 70.9 years) described self-care as an adaptive, experience-based process influenced by lived experience, health transitions, informal care networks and system responsiveness. Participants generally demonstrated agency and resourcefulness in managing complex and changing care needs, often learning through trial and error. Psychosocial and relational needs were frequently under-recognised in healthcare encounters, requiring individuals and informal carers to compensate for fragmented, inconsistent support. Self-care capability and capacity were shaped by experiential learning, health and self-care literacy and access to informal and online resources, particularly where formal education was limited or unavailable.
Self-care for older adults with multimorbidity is shaped by dynamic interactions between personal capability, relational support and system-level factors across the life-course. The Caring Life-Course Theory provides a comprehensive approach for understanding these interdependencies and identifying opportunities for intervention.
Findings highlight the need to strengthen coordinated, person-centred and relationally grounded approaches to self-care and self-management in primary and community care, including improved access to evidence-informed resources and anticipatory support.
This study is reported in accordance with the Consolidated Criteria for Reporting Qualitative Studies.
Participants contributed through semi-structured interviews and provided feedback on study findings.
What problem did the study address? Community-dwelling older adults living with multimorbidity are expected to engage in self-care, yet little is known about how they experience, enact and sustain daily self-care, particularly when psychosocial and relational needs are inconsistently recognised within health and social care systems. What were the main findings? Self-care was characterised as an adaptive, experiential process shaped by life experience, informal support networks and system responsiveness. Participants frequently compensated for under-recognised psychosocial and relational needs through informal and online supports and resources. Where and on whom will the research have an impact? Findings can inform clinicians, service providers and policymakers in primary, community and aged care settings by identifying opportunities to strengthen coordinated, person-centred and relational self-care and self-management support for older people with multimorbidity.
by Jocshan Loaiza-Moss, Michael Leitges
Cancer remains a leading cause of mortality worldwide and a significant barrier to improving quality of life across all populations. The protein kinase D family, including PRKD3, has been demonstrated to play a crucial role in cancer development through its involvement in regulating key cellular processes. Although growing evidence highlights the role of PRKD3 in the tumorigenesis of certain cancers, a comprehensive pan-cancer analysis of PRKD3 remains unavailable. To address this, we performed an integrative pan-cancer analysis of PRKD3 using multi-omics datasets from The Cancer Genome Atlas, the Genotype-Tissue Expression project, and cBioPortal. We examined PRKD3 expression, copy number variation, mutation, and DNA methylation, and evaluated their associations with clinicopathological features, patient survival, and diagnostic potential across 33 cancer types. Immune relevance was further assessed through correlations with immune infiltration, checkpoint gene expression, and immunotherapy response-related genomic biomarkers. Our results revealed that PRKD3 expression was highly heterogeneous, showing significant upregulation in liver cancer, gastric cancer, and adrenocortical carcinoma, and downregulation in others. Elevated expression was consistently associated with poor prognosis and increased stromal, neutrophil, and cancer-associated fibroblast infiltration in adrenocortical carcinoma, liver cancer, and stomach cancer, whereas paradoxical associations with favorable outcomes were observed in kidney clear cell carcinoma. PRKD3 expression also correlated with immune checkpoint molecules including PD-1, PD-L1, and CTLA-4, supporting an immunosuppressive role, while context-dependent associations with TMB and MSI highlighted its potential influence on tumor immunogenicity and responsiveness to immune checkpoint blockade. Collectively, these findings identify PRKD3 as a potential context-dependent modulator of tumor biology, prognosis, and immune interactions, underscoring its potential as a biomarker of diagnostic, prognostic, and therapeutic relevance in precision oncology.by Catharina Bartmann, Vanessa Schmidt, Michael Mörz, Michael Schwab, Monika Rehn, Bettina Blau-Schneider, Achim Wöckel, Ulrike Kämmerer
IntroductionCOVID-19 (Corona Virus Induced Disease-19) caused by the SARS-CoV-2 coronavirus can be a serious in pregnancy. Therefore, vaccination with modRNA vaccines was recommended depending on the immunity status for women of reproductive age and pregnant women since 2022. However, there are only preliminary data on transplacental transmission of the virus and modRNA from genetic vaccines so far.
MethodsThe study population included 106 women who have given birth at the Department of Obstetrics and Gynecology, University Hospital of Würzburg during November 2020 to October 2022. In addition to medical data and vaccination history, immunohistochemical examination of the placenta was performed with antibodies against SARS-CoV-2 spike and nucleocapsid proteins. RNAscope in situ Hybridization was used to show RNA detection in positive placental tissues as a proof of concept.
ResultsAltogether, 87% of participants received at least one vaccine dose against SARS-CoV-2 and 56 women (42 vaccinated, 14 not vaccinated) contracted COVID-19. In total, 31 placentas were found positive for the spike protein. Spike positive cells were predominantly Hofbauer cells and trophoblasts. In three cases of vaccinated and then infected woman, an additional nucleocapsid staining was detected, but there was no significant difference in staining pattern in correlation to the vaccine/COVID-19 status. Interestingly, we did not find viral RNA in the investigated samples, but we could show a positive in situ Hybridization of BNT162b2 and S-encoding mRNA-1273 in two individual samples.
DiscussionThe spike protein of SARS-CoV-2 has been be detected in placental Hofbauer and Trophoblast cells as well as villous endothelia after infection and vaccination indicating a possible transplacental transfer or uptake. These findings may suggest a potential for transplacental transfer or cellular uptake; however, the extent, mechanisms, and clinical significance of this phenomenon remain to be fully understood.Clinical trial registration: DRKS00022506.
by Elham Ahmadi, Sophia Baierl, Stephan Voss, Ida Asenkerschbaumer, Ursula Berndt, Leonie Bernhard, Anita Hennig, Anna-Lena Würfele, Michaela Coenen
Urban soundscapes, particularly those experienced in green spaces, have been increasingly recognized as factors that influence human mental health. This scoping review explores the existing literature on soundscapes within urban green spaces and their associated mental health outcomes. It aims to classify the methodologies used in this domain, identify mental health outcomes related to urban green space soundscapes, and examine specific soundscape elements and their correlations with mental health. A systematic search of peer-reviewed studies was conducted. After screening titles, abstracts, and full texts, 22 studies met the inclusion criteria. Diverse methodological approaches were identified, with an emphasis on quantitative multi-method designs. Commonly studied mental health outcomes include stress reduction, mood enhancement, perceived restorativeness, and cognitive restoration. Standardized psychometric tools, such as the Perceived Stress Scale (PSS-14), Positive and Negative Affect Schedule (PANAS) and Perceived Restorativeness Soundscape Scale (PRSS) are frequently used as outcome measures. Natural soundscape elements such as birdsong, water sounds, and rustling leaves had a positive association with relaxation and perceived mental restoration throughout all studies, while mechanical sounds, such as traffic noise were linked to adverse mental health outcomes. These findings highlight that natural soundscapes in urban green spaces have a potential positive relationship with mental health by reducing stress and enhancing mood. However, the cross-sectional design and methodological heterogeneity of the included studies limit causal interpretation. Future research should explore multi-sensory experiences and examine soundscapes in diverse urban contexts to provide more robust insights into their relationship with mental health. The practical implications suggest that urban planners should prioritize integrating natural sound elements into urban areas to improve mental health. The study protocol of this scoping review had been registered at OSF (osf.io/4r7gd).The debate about whether health visiting, a specialist community public health nursing role, is at the level of advanced practice nurse has gone on for more than a decade. There is little empirical evidence that the role matches the traditional role of an advanced practice nurse, although many of the attributes of advanced practice nursing such as prescribing rights, managing complex cases, caseloads with undifferentiated need and advanced assessment and decision-making are certainly present.
The current study aimed to develop, refine and test the Health Visiting Advanced Practice Scale to assess the scope of advanced practice of UK health visitors.
A cross-sectional and methodological scale validation design, following classical test theory.
The design consisted of three phases; the first involved scale development including item generation, phase two assessed the content validity index, and the third phase involved a cross-sectional survey to establish construct validity, content validity, and internal consistency reliability, and conduct exploratory and confirmatory factor analysis.
The initial 44-item scale underwent iterative exploratory and confirmatory factor analyses, leading to a refined 5-factor structure with 29 items covering domains such as family-centred care, leadership, prescribing, diagnostic reasoning, and professional practice. This final version demonstrated strong reliability and construct validity in the EFA but mixed fit indices in the CFA, supporting both internal consistency and validity of the scale.
The final scale offers a rigorously validated tool for assessing advanced practice among UK health visitors, capturing core domains such as family-centred care, leadership, prescribing, and diagnostic reasoning. By bridging theoretical frameworks with real-world practice, it fills a critical gap in evaluating and supporting the professional scope of this public health nursing specialty.
These findings provide valid and reliable insights for measuring and improving health visitors' advanced practice and developing future professional policies.
No patient or public contribution.
STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) guidelines for cross-sectional studies.
This study investigated the efficacy and safety of a novel thermo-reversible antimicrobial wound gel (TRG, revyve Antimicrobial Wound Gel) designed to combat biofilm-related infections in wounds. The TRG was evaluated for its ability to disrupt biofilms, sustain antimicrobial activity and promote wound healing. The gel exhibited thermo-reversible properties, transitioning from a less viscous liquid ≤ 18°C to a highly viscous solid gel at wound temperature which would facilitate easy application and removal. Antimicrobial testing demonstrated that TRG effectively inactivated a broad range of wound-related pathogens, including Staphylococcus aureus and Pseudomonas aeruginosa, with a 99.99%–99.9999% reduction in bacterial counts within 30 min. The TRG also maintained its antimicrobial efficacy after multiple inoculations with high microbial load (107 CFU/mL) over 7 days. In vitro biofilm assays showed effectiveness against biofilm bacteria with a reduction of ≥ 99.99% bacterial counts with one application over the course of 7 days. Biocompatibility testing confirmed that TRG was safe, with no signs of tissue necrosis or signs of tissue damage and no impact on wound healing in a porcine wound model. TRG's ability to reduce both planktonic and biofilm-based bacteria without compromising wound healing makes it a promising candidate for treating both chronic and acute wounds.
To explore experiences of healthcare providers, stroke survivors and caregivers on stroke transitional care delivery at a tertiary hospital in Tanzania.
A qualitative descriptive design with a phenomenological approach was used. Colaizzi’s thematic analysis was conducted using Dedoose software to identify significant information that describes the transitional care experiences of the study participants.
This study was conducted in the internal medicine and outpatient departments of a tertiary hospital in Tanzania.
15 triads of healthcare providers, stroke survivors and caregivers were purposively recruited to participate in semi-structured in-depth interviews between June and September 2024.
The analysis identified four themes: communication and exchange of information, involvement of patients and caregivers in transitional care, coordination of transitional care and experiences with changing care setting. Effective communication and information exchange among healthcare providers, survivors and caregivers ensured that survivors and their caregivers were well informed about the care process, clinical condition, prognosis and transitional care needs. A collaborative care approach enabled survivors and caregivers to actively participate in care, decision-making and discharge planning during hospital-to-home transition. Coordination of care was equally important during hospital-to-home transition as it provided survivors with home-care instructions and opportunities for follow-up care. However, miscommunication among the healthcare team, insufficient information exchange, inadequate discharge planning, poor social support and lack of care coordination prevented smooth hospital-to-home transition leading to a crisis at home.
The experiences of healthcare providers, patients and caregivers during stroke transitional care in Tanzania highlight achievements and key areas for improvement. Hospital-to-home transition is often characterised by uncertainty and emotional strain, emphasising the need for effective communication, involving patients and caregivers in care, as well as coordinating transitional care to address medical and psychosocial needs of survivors and their caregivers during and after discharge.
by Taylor E. Gin, Charlotte O. Moore, Trey Tomlinson, Grace Wilson, Amiah Gray, Cameron Sutherland, Kamilyah Miller, Krista Li, Michael Canfield, Brian Herrin, Erin Lashnits, Benjamin Callahan
BackgroundCtenocephalides felis is a common ectoparasite of dogs and cats and can transmit a variety of pathogens including Bartonella and Rickettsia species. These bacteria, along with the known endosymbiont Wolbachia, are well-documented members of the C. felis microbiome, but species-level information is limited. Additionally, little is known about the variation in the C. felis microbiome in fleas from different sources and when different sequencing methods are applied to the same samples.
ObjectiveThis study aimed to characterize the flea microbiome using both short-read (V3/V4) and long-read (full-length) 16S rRNA gene sequencing, determine whether long-read sequencing improves species-level identification especially in known pathogenic genera, and evaluate differences in microbial composition between fleas collected from cats, dogs, and environmental traps.
MethodsFleas were collected from cats, dogs, and traps in flea-infested homes in Florida, pooled by source, and sequenced using short- (V3/V4) and long-read (full-length) 16S rRNA gene sequencing. Microbial prevalence and abundance were compared across sequencing approaches. Community composition was evaluated for differences between sources and houses. Candidate members of the flea microbiome were identified based on a combination of prevalence, abundance, and statistical signatures of potential contaminant origin. For Rickettsia and Bartonella, species-level taxonomic assignments were refined using a phylogenetic approach.
ResultsWolbachia, Rickettsia, and Bartonella were the most prevalent and abundant taxa. Spiroplasma was identified as a fourth core member of the flea microbiome. Long-read sequencing enabled better, but not perfect, species-level classification of Bartonella and Rickettsia compared to short-read sequencing. Important relationships between specific ASVs and flea sources were identified, for example fleas from cats harbored higher abundances of B. clarridgeiae and B. henselae than fleas from traps.
by Michael Loizos Mavrovouniotis
Computations of length of stay in animal shelters rely on fixed animal cohorts. This is appropriate for research studies that pre-select cohorts, but it is problematic for operational assessments of animal shelters in fixed calendar periods or for comparisons among periods or shelters. Considering only the length of stay of animals whose stay ended within the study period leads to misinterpretation. The use of the Kaplan-Meier and Cox proportional hazards methods with left-truncation and right-censoring is proposed to correctly account for all animals present in the shelter for any fraction of a study period, including those that were present at the beginning and those that remain in care at the end of the period. Examples of dog length of stay in Orange County Animal Care in California show that this computation method corrects the misleading view of historically used calculations of length of stay. Statistically significant changes in length of stay are observed in 8 out of 23 quarterly periods. In a comparison of length of stay before and after the COVID-19 pandemic, the observed significant change in length of stay cannot be explained by variations in sizes and ages of incoming dogs and may be connected to operational policies that restricted visitor access. The proposed approach enables timely tracking of length of stay, accurate comparisons, and assessment of shelter practices and resource needs.Viral hepatitis B (HBV) and C (HCV) infections remain major public health threats in Ghana, with prevalence rates significantly higher in prison populations than in the general population. Despite this, incarcerated individuals are frequently excluded from national testing and treatment programmes. Overcrowding, poor sanitation and limited access to healthcare create a high transmission risk. There is an urgent need for targeted, evidence-based interventions to address this health inequity and support Ghana’s progress towards viral hepatitis elimination.
This protocol describes a study designed to evaluate the effectiveness of a multicomponent targeted educational intervention in increasing knowledge, intention to test, testing uptake and treatment initiation for HBV and HCV among adult prison inmates in the Greater Accra and Eastern Regions of Ghana.
A cluster randomised controlled trial (RCT) with a 1:1 parallel design will be conducted in eight prisons stratified by gender (six male, two female) with 208 inmates per arm. The intervention group will receive the Prison Education for Prevention of Hepatitis Intervention, comprising an education programme (posters, infographics, film screenings, peer-led discussions and structured health education) alongside HBV and HCV testing, treatment and care linkage. The control group will receive standard health education and basic printed materials. Testing intentions, uptake, prevalence and treatment outcomes will be measured. Cost-effectiveness analysis will inform sustainability and scale-up. The primary endpoint is uptake of hepatitis B and C testing. Secondary outcomes include changes in hepatitis knowledge and testing intentions, prevalence of hepatitis B and C, treatment uptake among diagnosed inmates, linkage to hepatitis care services and cost-effectiveness of the intervention.
Data will be analysed, accounting for prison clustering, using mixed-effects models and regression methods. Outcomes include testing uptake, knowledge, intentions, prevalence, treatment initiation and sustained virologic response, adjusted for key covariates. Baseline characteristics and intervention reach will be summarised descriptively. Analyses will follow intention-to-treat and Consolidated Standards of Reporting Trials guidelines. Cost-effectiveness will estimate Incremental Cost Effectiveness Ratio (ICERs) per inmate tested, infection detected and treatment initiated.
The RCT was approved by the College of Health Sciences ethics and protocol review committee (no. CHS-E/M.1-P 4.7/2025–2026). Results will be presented at relevant national and international meetings and conferences and will be published in international peer-reviewed journals. Furthermore, we plan to communicate the results to relevant stakeholders in the Ghanaian Prisons and Healthcare systems.
PACTR202512558588684.
Nurse practitioner-sensitive outcomes (NPSOs) are critical indicators of the quality and effectiveness of nursing care provided to older adults. These outcomes, which include metrics such as falls, pressure ulcers, infection rates, frailty, delirium, length of stay, hospital readmissions, and quality of life (QoL), are essential for assessing the impact of nurse practitioners (NPs) and enhancing patient safety. Despite their importance, the current literature on NPSOs in services for older adults remains limited. This scoping review aims to address this gap by systematically mapping the existing research, identifying key themes, and uncovering areas needing further exploration. By doing so, the authors seek to provide a comprehensive overview that will inform future research directions and contribute to the enhancement of clinical practice in older person services (OPS). This review is important for healthcare providers, policymakers, and researchers who are committed to improving the quality of nursing care and outcomes for older people.
The aim of this scoping review is to map the existing research on NPSOs in services for older adults. This review seeks to identify key themes and gaps in the current literature to guide future research and enhance clinical practice in this area.
The Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR) guidelines were utilised to structure this scoping review.
From initial screening of 3593 manuscripts drawn from seven databases, 66 were deemed eligible for full screen. Five studies met the inclusion criteria and were ultimately selected for data extraction and analysis. The most common outcome measures reported were complications and comorbidities, and QoL.
This review highlights that the reporting of NPSOs in older person care is lacking and requires further attention.
To determine the prevalence of burnout and back pain in homecare workers in Switzerland and assess their associations with psychosocial work environment factors.
National multicentre cross-sectional study.
Using paper-pencil questionnaires, data were collected from January 2021 to September 2021 from employees of 88 homecare agencies across Switzerland. Respondents who identified themselves as administrators, apprentices, or trainees, who were in leadership positions, or who were not involved in the provision of care or housekeeping were excluded from this analysis. Burnout was assessed with the Copenhagen Burnout Inventory Scale (possible score range 0–100) and back pain with a single item from the Federal Statistical Office's Swiss Health Survey. Multilevel regression analyses were used to assess burnout and back pain's associations with psychosocial work environment factors.
We included 2514 homecare workers. More than two-thirds (68.6%) reported back pain in the past 4 weeks. The overall mean burnout score was 36.0 (SD 18.3). Poorer work-life balance, higher perceived workload and verbal aggression from clients were positively associated with both outcomes. Better leadership and social support from colleagues were negatively associated with burnout. Higher role conflict levels correlated with higher burnout levels.
Our findings indicate that the psychosocial work environment should be considered when designing interventions to reduce the prevalence of burnout and back pain among homecare workers.
The high reported burnout and back pain prevalences among homecare workers highlight an urgent need to design and implement psychosocial work environment-improving interventions. In addition to contributing to homecare employees' long-term attraction and retention, protecting and promoting their health and well-being will likely not only benefit them, but also contribute to patient safety, quality of care and homecare sustainability.
The study reports the prevalence of burnout and back pain among homecare workers and their associations with psychosocial work environment factors. The results indicate that six psychosocial work environment factors—work-life balance, perceived workload, leadership quality, levels of social support from colleagues, role conflict levels, and verbal aggression from clients—all correlate with burnout and/or back pain in homecare workers. For policy makers, researchers, healthcare managers, and homecare agencies, this study's findings will inform the development of interventions to enhance homecare work environments, leading to improvements both in workers' health and in the quality of their care.
We have adhered to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) reporting checklist for cross-sectional studies.
Our stakeholder group included patient representatives, policy makers, researchers, clinicians and representatives of professional associations. Throughout the study, all provided support and input on topics including questionnaire development, result interpretation and the design of strategies to improve response rates.
by Carmen Villagrasa, Giorgio Baiocco, Zine-El-Abidine Chaoui, Michael Dingfelder, Sébastien Incerti, Pavel Kundrát, Ioanna Kyriakou, Yusuke Matsuya, Takeshi Kai, Alessio Parisi, Yann Perrot, Marcin Pietrzak, Jan Schuemann, Hans Rabus
Biological effects induced by diverse types of ionizing radiation are known to show important variations. Nanodosimetry is suitable for studying the link between these variations and the patterns of radiation interactions within nanometer-scale volumes, using experimental techniques complemented by Monte Carlo track structure (MCTS) simulations. However, predicted nanodosimetric quantities differ among MCTS codes, primarily because each code employs distinct molecular-scale particle interaction models. This multi-code study examines these variations for low-energy electrons (20–10,000 eV), which play a critical role in energy deposition and biological effects by virtually all types of ionizing radiation. Specifically, the hypothesis tested in this work is that inter-code variability in nanodosimetry results is mainly caused by differences in assumptions regarding total interaction cross sections. Ionization cluster size distributions and derived nanodosimetric parameters were simulated with seven MCTS codes (PARTRAC, PHITS-TS, MCwater, PTra, and three Geant4-DNA options) in liquid water as a surrogate for biological tissue. Significant inter-code differences were observed, especially at the lowest energies. They were substantially reduced upon replacing the original cross sections in each code with a common, averaged dataset, created ad-hoc for this study and not based on theoretical assumptions. For example, for 50 eV electrons in 8 nm spheres, the variability in the predicted mean ionization numbers decreased from 23% to 5%, and in the probability of inducing two or more ionizations from 34% to 7% (relative standard deviations). This quantification demonstrates that total interaction cross sections are the primary source of uncertainty at low electron energies. A sensitivity test using DNA damage simulations with the PARTRAC code revealed that cross section variations notably affect biological outcome predictions. Replacing the code’s original cross sections with the averaged ones increased the predicted double-strand break yield by up to 15%. These findings underscore the urgent need for improved characterization of low-energy electron interaction cross sections to reduce uncertainties in MCTS simulations and enhance mechanistic understanding of radiation-induced biological effects.To review how life-course theories, models and frameworks define and classify life stages and transitions; how they characterise trajectories of care needs and care provision; and to consider how these insights might inform future developments of care-focused life-course frameworks.
Narrative review using a theory synthesis approach.
The review synthesised 56 theories, models and frameworks, drawn from 90 articles published up to 2024, using a three-stage process: extraction and summarisation of conceptual content; comparison to identify convergence and divergence; and interpretive synthesis to generate an overarching account of how frameworks conceptualise life-course development, care transitions and care trajectories.
Earlier life-course perspectives emphasise normative, age-graded stages, while more recent approaches highlight transitional junctures, relational contexts and structural influences on care trajectories. Life stages were defined variably, encompassing developmental phases, chronological age bands, major life transitions, historical and cultural perspectives and diverse lived experiences. Trajectories of care needs and provision were shaped by social networks, socioeconomic conditions, timing of transitions, transgenerational relationships and interdependencies, and intersectionality. Findings suggest that care needs and care provision fluctuate across time and are best understood as interrelated, dynamic processes influenced by life-course biographies, as well as broader social, economic and policy environments at individual (micro), relational (meso) and structural (macro) levels.
Life-course frameworks are shifting from age-based models towards personalised, context-sensitive perspectives that better capture the complexity and diversity of care trajectories.
Care planning should incorporate not only developmental stage but also individual, relational and structural factors influencing care needs, care provision and care trajectories over time.
Applying a personalised, multilevel life-course perspective may improve assessment accuracy, coordination of resources and equity in care delivery.
This narrative review did not involve patients or the public.
To adapt an instrument to measure patient safety culture, as rated by home care workers, and examine its psychometric properties.
A multicentre cross-sectional psychometric study.
We adapted the Nursing Home Survey SOPS to measure safety culture in home care. The questionnaire was translated to French following the Translation, Review, Adjudication, Pretest and Documentation (TRAPD) approach. Experts in home care evaluated the content validity of the adapted and translated instrument. To pre-test the questionnaire, we conducted cognitive interviews. We invited home care workers from two home care agencies in the French-speaking region of Switzerland to participate in the cross-sectional study from November to December 2024. We performed confirmatory factor analysis using the R package ‘lavaan’ and assessed convergent, discriminant and known-groups validity.
Eight experts assessed the content validity of the adapted and translated instrument. Responses from 672 home care workers were analysed. Except for compliance with procedures, all dimensions showed acceptable or good internal consistency. Regarding construct validity, first-order and second-order level confirmatory factor analysis showed acceptable model fit. Safety culture correlated with overall patient safety rating and psychosocial safety climate. Regarding known-groups validity, participants who do not work directly with clients most of the time, and those willing to recommend the organisation rated the safety culture higher.
The psychometric evaluation indicated that the adapted instrument can be used as a valid and targeted tool to assess patient safety climate/culture in Swiss French-speaking home care agencies.
The existence of an adapted and validated instrument for use in home care enables managers to monitor safety culture and develop interventions to improve it and consequently ensure patient safety.
To the best of our knowledge, there was no instrument specifically targeting the measurement of patient safety culture in the home care setting. The adapted instrument for home care showed to be a valid tool to provide information about safety culture in this setting. The availability of an instrument to measure safety culture in the home care setting can promote its monitoring, raise awareness of safety culture among staff, help managers prioritise key aspects for culture change, and thus improve patient safety. A wider adoption of the same instrument could also facilitate comparative analyses.
We used the COSMIN guidelines for the psychometric evaluation of the instrument and the STROBE reporting guidelines for the cross-sectional study.
This study did not include patient or public involvement in its design, conduct or reporting.
FreshRSS 