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○ F1000 Research Ltd

Preprints posted in the last 7 days, ranked by how well they match F1000Research's content profile, based on 88 papers previously published here. The average preprint has a 0.12% match score for this journal, so anything above that is already an above-average fit.

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Bacterial profile and antibiotic sensitivity patterns among patients admitted to the Intensive Care Unit at Mbeya Zonal Referral Hospital: a cross-sectional study.

Zumba, M. A.; S., M.; A., J.; E., L.; H., M.; A., O.; F, R.; M., E.

2026-10-16 intensive care and critical care medicine 10.64898/2026.10.14.26365595 medRxiv
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Sepsis is a global health problem. Patients in the Intensive Care Unit (ICU) are at risk of having sepsis because of their vulnerability and use of invasive medical devices. Emerging antimicrobial-resistance complicates treatment. Understanding bacterial profiles and antibiotic sensitivity patterns in the ICU plays an important role in managing sepsis, optimizing antimicrobial use, and improving patient outcomes. The aim of this study was to show bacterial profiles and antibiotic sensitivity patterns among patients who were admitted to the ICU at Mbeya Zonal Referral Hospital for 12 months. This was a prospective cross-sectional study among 187 sepsis-suspected patients. Data analysis was performed using SPSS Version 27. Categorical data were summarized by frequency and percentage. Fishers exact test, chi-square test, and modified Poisson regression were used to show the association between patients clinical variables and culture positivity at a 95% CI. Statistical significance was set at a p-value < 0.05. Out of 187 samples, 41.7% were culture positive. Gram-negative bacteria were commonly isolated (65.4%, with Klebsiella pneumoniae and Escherichia coli being commonly isolated. Commonly isolated Gram-positive bacteria were Coagulase-negative Staphylococcus species (19%). 100% of gram-positive bacteria and 96% of gram-negative bacteria were Multi-Drug Resistant (MDR), respectively. In multivariable analysis, patients who were intubated and mechanically ventilated (aPR = 2.208, 95% CI: 1.133-4.305, p = 0.020) and post-laparotomy patients (aPR = 3.241,95% CI: 1.320-7.958, p = 0.010) independently had a higher proportion of Gram-negative bacteria. The study reveals a high level of resistance to commonly used antimicrobials in our setting, necessitating strengthening of the antimicrobial stewardship program and routine surveillance of antimicrobial resistance patterns.

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Evd Duration In Aneurysmal Subarachnoid Haemorrhage: A Single Centre Retrospective Cohort Study

Verma, A.; Davidson, K.; Fitzgerald, E.; Donaldson, L.; Garside, T.; Elliott, R.; Bass, F.; Hammond, N. E.; Kabir, A.; Delaney, A.

2026-10-21 intensive care and critical care medicine 10.64898/2026.10.18.26365822 medRxiv
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Introduction and objectives Hydrocephalus is a common complication of aneurysmal subarachnoid haemorrhage. This is one of several standard indications for the insertion of an external ventricular drain, but there are no standard guidelines for timing of extraventricular drain discontinuation in this population. Therefore, the study aims were to examine the 1) factors associated with extraventricular drain duration in aneurysmal subarachnoid haemorrhage and 2) association between extraventricular drain duration and clinical and resource-based outcomes. Methods In this single centre retrospective cohort study, data for adult patients treated in the ICU between 2015-2023 with aneurysmal subarachnoid haemorrhage and requiring an extraventricular drain were analysed. Data were extracted from both a prospective patient registry and the electronic medical record. Linear regression modelling was used to identify the factors associated with extraventricular drain duration. Measures used to examine the association between extraventricular drain duration, and the outcomes of interest included hazard ratio, relative risk, and mean differences as appropriate for a specific outcome. Results Of the participants (n=205), 68% (n = 140) were female, mean age was 60.7 (SD 13.3) years and 71% (n = 145) had a modified Fisher score of 4. Mean extraventricular drain duration was 15.3 (SD 8.6) days. The number of days mechanically ventilated and extraventricular drain challenge by clamp trial were associated with an increased duration of extraventricular drain treatment. Increased extraventricular drain duration was associated with an increased incidence of ventriculoperitoneal shunt insertion, and an increase in ICU and hospital length of stay when extraventricular drain duration exceeded 20 days. Conclusion The factors associated with an increased duration of extraventricular drain treatment were a longer duration of mechanical ventilation. The outcomes associated with an increased duration of extraventricular drain treatment were an increased incidence of ventriculoperitoneal shunt insertion, an increased incidence of ventriculitis when extraventricular drain duration exceeded 20 days, and an increase in ICU length of stay. These study findings may inform the conduct of a larger multi-centre study to examine the factors associated with duration of treatment with extraventricular drain, and outcomes associated with extraventricular drain duration.

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Upright Participation for Learners with Physical Disabilities: A Pilot Randomized Crossover Effectiveness-Implementation Trial of Robot-assisted Walking in Schools

Hilderley, A.; Diot, C.; Morgan, B.; Byrne, E.; Chu, E.; Gosselin, A.; Sheldon, K.; McCormick, A.; Wright, F. V.; Pritchard, L.; Shen, H.; Kirton, A.; Condliffe, E.

2026-10-21 rehabilitation medicine and physical therapy 10.64898/2026.10.16.26365549 medRxiv
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Background: School-based implementation of robot-assisted walking may support increased physical and social participation for children with physical disabilities, but evidence from an adequately powered trial is needed. This pilot study evaluated implementation strategies and study procedures to inform a future definitive trial. Methods: Participants were randomized to 12-weeks of robot-assisted walking or control, with subsequent crossover to the other condition. In the intervention arm, targeted dose was 75 minutes of robot-assisted walking, spread across three days/week. Implementation strategies for the child's classroom team included educational materials, centralized technical assistance, school champions, and on-going training. Implementation strategy evaluation focused on intervention protocol feasibility (i.e., weekly device use, troubleshooting) and fidelity (documentation of implementation strategy modifications). Preliminary estimates participation goal changes were obtained using the Canadian Occupational Performance Measure (COPM) 'Performance' scale (/10). Results: Eight children with neurodevelopmental physical disabilities participated (mean age 3.5, SD 0.5 years). Device use varied from 2.1 to 4.3 days/week (median 3.3) with a range of 48 to 96 minutes/week (median 80). Target use of >= 3 days/week was achieved for 66% of weeks and met the >=75-minute target for 33% of weeks. Troubleshooting occurred in 18.5% of sessions. Two implementation strategies were modified to improve feasibility. COPM mean change was 3.56 (SD 1.07) for robot-assisted walking and 2.11 (SD 2.41) for control (dz=0.74). Conclusions: This pilot study provided preliminary evidence regarding both the feasibility of robot-assisted walking implementation in schools and its potential effectiveness for children with physical disabilities. Findings support progression to a definitive trial.

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Microbiological characteristics of ventilator-associated pneumonia in patients with neurological injuries: a multicentric cohort

Fouere, L.; Youinou, M.; Schimpf, C.; Mongardon, N.; Quesnel, C.; Philippart, F.

2026-10-16 intensive care and critical care medicine 10.64898/2026.10.15.26365620 medRxiv
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Incidence of ventilator-associated pneumonia (VAP) is increased in patients admitted for brain injury. Staphylococcus aureus appears to be a particularly common pathogen in these respiratory infections. Our aim was to confirm the extent of S. aureus involvement in VAP among patients with neurological injuries. We conducted a retrospective, multicenter study including patients with and without neurological injuries who developed VAP during their ICU stay. Among 15 702 patients admitted in the participant centers during the study period. 407 were finally included in the study. S. aureus was involved in 122 (61.6%) VAP in brain-injured patients and 63 (30.1%) of non-brain-injured patients. In brain-injured patients, multivariate analysis identified age (0.97 [0.95; 0.98]), antibioprophylaxis (0.31 [0.18; 0.53]; p < 0.0001), subarachnoid hemorrhage (2.18 [1.01; 4.68]; p=0.0461), lower Glasgow coma score (0.92 [0.87; 0.97]; p= 0.004) and SAPS II (0.98 [0.97; 1]; p=0.0174) as critical factors associated with the risk of S. aureus in VAP. In the non-brain-injured population, multivariate analysis identified antibioprophylaxis (0.38 [0.22; 0.65]; p=0.0006), age (0.96 [0.95; 0.98]; p<0.0001), SAPS II (0.98 [0.97; 1]; p=0.0265), thoracic surgery (0.21 [0.09; 0.48]; p=0.0002) and peripheral neurosurgery (1.95 [1.2; 3.19]; p=0.0076) as critical factors. A total of 172 patients (42.3%) died during their ICU stay and 90-days mortality was 194 (47.7%). No difference of mortality was noticed function of VAP-associated pathogen.

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Development of a Communication Characteristics Module for Autistic Adults and the Creation of a Communication Profile Variable

Kripke-Ludwig, R.; Vera, J. W.; Moura, I.; Kapp, S. K.; Siddeek, Z.; Maslak, J.; Wallington, A. F.; Rosa, S. D. R.; Kripke, C. C.; Nicolaidis, C.

2026-10-19 rehabilitation medicine and physical therapy 10.64898/2026.10.15.26365687 medRxiv
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Purpose Autistic adults have diverse communication characteristics that are not well captured by standard demographic measures. Communication affects self-determination, relationships, access to healthcare, and services. Characterizing communication differences may improve research and intervention targeting for meaningful subgroups of autistic adults. Methods The Academic Autism Spectrum Partnership in Research and Education (AASPIRE) Outcomes Project team used a community based participatory research (CBPR) approach to develop a self- or caregiver-report module to characterize communication among autistic adults. The 10-item module asks about receptive and expressive communication, literacy, speech reliability, usage of digital communication, use of alternatives to speech, and communication fluency. It can be completed directly, with or without support, or via a caregiver. We used baseline survey data from 844 autistic adults to evaluate the module and derived a five-level variable, Communication Profile, from selected module items to stratify participants. We examined completion feasibility, response consistency, and construct validity. We also assessed test-retest reliability in a 15% random subsample who completed a 2-week retest following the 6-month survey, with oversampling of caregiver-report respondents. Results The Communication Characteristics module demonstrated high completion feasibility, minimal systematic error, and strong construct validity. The Communication Profile variable stratified participants into five meaningful communication profiles and demonstrated strong construct validity and substantial test-retest reliability ({kappa} = .69). Conclusion The Communication Characteristics module and Communication Profile variable provide a valid approach for characterizing communication diversity among autistic adults for research, clinical, and service settings. The full AASPIRE Measurement Toolkit is available at https://aaspire.org/measurement. Lay Summary Autistic people communicate in many different ways, and their communication may change in different situations. We developed and tested a set of survey questions to describe an individuals communication. We also used the results to describe 5 groups of autistic people based on how they communicate, without treating these groups as different types of autism.

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Spatial and Temporal Evaluation of Violent and Total Crime Following Community-Led Urban Greening

Song, J.; Li, Y.

2026-10-20 public and global health 10.64898/2026.10.19.26357148 medRxiv
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Community-led urban greening may contribute to neighborhood safety, but its relationship with crime remains uncertain. We examined whether Keep Indianapolis Beautiful Project GreenSpaces in Indianapolis were associated with changes in violence and total crime. We used a matched-pair difference-in-differences design comparing funded sites with matched unfunded applicant sites. The primary analysis included 29 matched pairs with two years of pre- and post-grant follow-up. Monthly Part I violent offenses and total crime within 600-m buffers were modeled using Poisson pseudo-maximum likelihood. In the first post-grant year, the violent-crime estimate was lower but imprecise (IRR, 0.903; 95% CI, 0.805-1.014). In the second post-grant year, the relative rate was lower (IRR, 0.830; 95% CI, 0.718-0.961). Total crime estimates showed no clear post-grant change. Additional analyses indicated some sensitivity to spatial scale, but no sustained divergence in pre-grant crime patterns. Analyses of short-term crime dependence showed clear month-to-month persistence in violent crime within sites but limited evidence of stable spatial dependence across nearby sites. Therefore, within the two-year post-grant period examined, Project GreenSpaces was associated most consistently with lower relative violent-crime rates in the second year, while no corresponding decrease was observed for total recorded crime. Longer follow-up is needed to determine whether these patterns persist or change as projects mature.

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Heart rate variability and electrocardiographic parameters among workers exposed to chronic intermittent hypobaric hypoxia in the Peruvian Andes: A cross-sectional study Cardiac autonomic function in Andean workers

Montes-Madariaga, E. S.; Ortiz-Saavedra, J. B.; Mamani Castillo, J. S.; Valencia-Pacheco, A. I.; Ballon Echegaray, J. A.; Paz Torres, I. L.; Leon Vasquez, R. A. J.

2026-10-16 cardiovascular medicine 10.64898/2026.10.15.26365599 medRxiv
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Chronic intermittent hypobaric hypoxia is an occupational exposure experienced by workers who alternate between high-altitude worksites and lower-altitude resting locations. Its effects on cardiac autonomic modulation and electrocardiographic parameters remain insufficiently characterized in Andean workers. This study aimed to compare heart rate variability and electrocardiographic parameters between workers exposed to chronic intermittent hypobaric hypoxia and controls working permanently at lower altitude in Arequipa, Peru. An observational cross-sectional study was conducted in 96 male workers aged 20-60 years. The exposed group included 53 workers performing rotational shifts at altitudes [&ge;]3,000 m above sea level with rest periods at <2,500 m, while the control group included 43 workers working permanently at <2,500 m. Heart rate variability was assessed during the morning rest period in Arequipa, at approximately 2,300 25 m above sea level, using a Polar(R) H10 heart rate sensor after 15 minutes of rest. Participants also underwent standard 12-lead electrocardiography. Vital signs were clinically similar between groups. No statistically significant differences were observed in PR interval, corrected QT interval, time-domain heart rate variability parameters, or frequency-domain heart rate variability parameters. In this sample of apparently healthy male workers evaluated during their rest period at moderate altitude, exposure to chronic intermittent hypobaric hypoxia was not associated with significant differences in resting heart rate variability or standard electrocardiographic parameters.

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The Effect of Regionalization of Thoracic Surgery on Blood Transfusion at the Ottawa Hospital

Smith, J.; Smith, B.; Pittman, T.

2026-10-19 health economics 10.64898/2026.10.15.26365639 medRxiv
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This paper examines the impact of Cancer Care Ontario's regionalization of lung cancer surgery on blood transfusion use for thoracic surgery at The Ottawa Hospital. Using aggregate data scraped from the paper ''Changing trends in blood transfusion: an analysis of 244,013 hospitalizations'' by Shehata et al. (2014) we estimated the effect regionalization on the log mean number of blood transfusions among thoracic surgeons (who treat lung cancer), utilizing other surgical specialties as controls. We found that the average number of blood transfusions increased significantly among thoracic surgeons following the opening of a new cancer care centre at the hospital in December 2009, while control specialties showed no parallel change. Contextualizing these results in a modified ''population level'' treatment threshold model, it is argued that the main driver of this increase in blood transfusions among thoracic surgeons was due to the influx of less skilled thoracic surgeons to The Ottawa Hospital, and the closing of thoracic surgery units at smaller hospitals which was part of the broader regionalization process.

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Adenovirus as a Causative Agent of an Acute Gastroenteritis Outbreak in Salvador, Bahia, Brazil.

Vidal, B.; Neves, S.; Santos, I. P.; Sardi, S. I.; Campos, G. S.

2026-10-21 gastroenterology 10.64898/2026.10.19.26365929 medRxiv
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Introduction: Acute gastroenteritis (AGE) is a cause of childhood morbidity and may be associated with human adenovirus (HAdV) infection. This study aimed to investigate the occurrence of HAdV in fecal samples from children with AGE in Salvador, Bahia, Brazil, as well as to molecularly characterize the identified strains and evaluate their cytopathic effects in cell culture. Methods: A total of 131 samples were analyzed using the nested polymerase chain reaction (Nested-PCR) technique. Molecular characterization was performed through Sanger sequencing and phylogenetic analysis, while Vero cell cultures were used to investigate the occurrence of cytopathic effects. Results: Of the samples analyzed, 13 (9.9%) tested positive for HAdV, while 118 (90.1%) were negative. The highest detection frequency was observed in children aged three years or younger, particularly those under one year of age. Phylogenetic analysis identified variants related to HAdV-F41 and HAdV-B3, revealing genetic differences and distinct clustering patterns compared with reference sequences. In cell culture, cytopathic effects were observed four days after inoculation, although further analyses are required to confirm productive viral replication. Conclusion: These findings demonstrate the presence of HAdV in the samples studied and contribute to understanding its genetic diversity and circulation in Salvador, highlighting the importance of epidemiological surveillance and further studies on its role in the etiology of childhood AGE.

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Dietary Enhancement for Iron Deficiency and Anaemia Treatment (DEFeAT): study protocol for a randomised controlled trial to assess the effect of a mineral-enriched powder on iron deficiency in women of reproductive age

Burns, J. L.; Scott, H.; Mbuagbaw, L.; Miller, C. H.; Sheyholislami, H.; Clouthier, B. A.; Fontaine-Bisson, B.; Connor, K. L.

2026-10-21 nutrition 10.64898/2026.10.20.26365734 medRxiv
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Background: Iron deficiency (ID) and iron deficiency anaemia (IDA) have global and severe health implications, and disproportionately impact women of reproductive age. Current methods of supplementing diets with iron are challenged by poor adherence and palatability, reducing effectiveness of these treatment strategies. The aim of this study is to evaluate the efficacy of a novel home beverage fortification with a mineral-enriched powder, designed to enhance bioavailability and ease of use, for the treatment of ID in women of reproductive age. Methods: This single-centre, randomised, double-blinded placebo-controlled trial will enrol 150 eligible biologically female participants with ID. Participants will be randomly assigned to the active intervention (iron/zinc-enriched powder) or control group (placebo powder) over 6 months. Primary outcomes will include change in serum ferritin (SF) concentrations and proportion of participants who remain iron deficient at 6-months. Secondary outcomes will include change in SF and haemoglobin (Hb) concentrations across timepoints, and levels of metabolites and key circulating pro-inflammatory biomarkers, changes in dietary intakes, self-reported perceptions of health, barriers to use of the powder, adherence and palatability, safety outcomes, and cost-effectiveness. Exploratory outcomes will assess the gut microbial metagenome and metabolome. Discussion: Fortification, an effective approach for the prevention of ID/IDA, has advantages over some methods of supplementation because it uses low levels of iron, minimising unpleasant side effects, does not risk toxicity, and has high acceptability and compliance rates. This mineral-enriched powder uses electrolytic iron and zinc sulphate monohydrate of a small particle size, which is less irritating to the gut, and facilitates bioavailability. Findings from the study will be shared with those affected by and involved in treating these conditions, as a novel intervention that is both effective and acceptable among women of reproductive age would help to improve treatment compliance, and ultimately, reduce ID/IDA burden. Trial registration: This trial is registered at clinicaltrials.gov (NCT05990166): https://clinicaltrials.gov/study/NCT05990166, August 2023.

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Detection and Characterization of Human Bocavirus in Stool Samples from an Acute Gastroenteritis Outbreak in Salvador, Bahia, Brazil, in 2024.

Vidal, B.; Neves, S. O.; Santos, I. P.; Sardi, S. I.; Campos, G. s.

2026-10-21 gastroenterology 10.64898/2026.10.19.26365916 medRxiv
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Introduction: Acute gastroenteritis (AGE) is a global public health problem and a major cause of mortality in low- and lower-middle-income countries. Human bocavirus (HBoV) is among the viral agents associated with this condition. Therefore, investigating the presence of HBoV in cases of AGE in Salvador, Bahia, as well as its prevalence and circulating strains, is important. Objective: To investigate the occurrence of HBoV infection during an AGE outbreak in Salvador. Methods: A total of 178 samples were analyzed for HBoV using nested polymerase chain reaction (nested PCR), and the amplification products were visualized by agarose gel electrophoresis. HBoV was detected in 5.7% of the samples analyzed. Conclusion: This study contributes to the understanding of HBoV epidemiology as a secondary agent associated with acute gastroenteritis during a norovirus outbreak in Salvador. Continued investigation and identification of the etiological agents involved in outbreaks are essential for evaluating the causes of AGE. These findings also highlight the need for broader diagnostic approaches and the importance of phylogenetic analysis for monitoring and controlling viral infections.

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Factors associated with poor glycaemic control among children and adolescents with Type 1 Diabetes Mellitus at a tertiary hospital in Kenya

Omar, A.; Marangu-Boore, D.; Bukachi, F.; Were, F.

2026-10-16 endocrinology 10.64898/2026.10.14.26365593 medRxiv
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Type 1 diabetes mellitus (T1DM) remains a growing global health priority, with disproportionate underdiagnosis, delayed diagnosis, and mortality in sub-Saharan Africa. Despite the introduction of the Life for a Child (LFaC) programme in Kenya, which provides free insulin, glucose-monitoring supplies, and specialist education, no published studies have examined the determinants of glycaemic control among Kenyan children and adolescents with T1DM. This study aimed to determine the proportion of children and adolescents achieving good glycaemic control and to identify the socio-demographic and clinical determinants of glycaemic control at a tertiary hospital in Kenya. This cross-sectional study enrolled 160 children and adolescents with T1DM attending the paediatric diabetes clinic at Kenyatta National Hospital, Nairobi, between September 2025 and May 2026. Sociodemographic and clinical data were collected through structured interviews and physical examination. Poor glycaemic control was defined as HbA1c >7.5%. Associations between candidate determinants and glycaemic control were assessed using chi-square or Fisher's exact tests. Variables with p<0.2 on bivariate analysis were entered into a multivariable logistic regression model; Firth's penalized-likelihood method was used given the small number of participants achieving good control. Only 9 participants (5.6%) achieved the target HbA1c of [&le;]7.5% (mean HbA1c 11.02%, SD {+/-}2.29), and only 5 of 133 patients (3.8%) had [&ge;]70% of glucometer readings within the target blood glucose range (3.9-10.0 mmol/L).On bivariate analysis, household income (p=0.026) and self-monitored blood glucose (SMBG) frequency (p=0.018) were significantly associated with glycaemic control. In an exploratory multivariable regression analysis (Firth penalized logistic regression, given the small number of participants with good control), only SMBG frequency [&ge;]4 tests/day remained independently associated with lower odds of poor control (adjusted OR 0.19, 95% CI 0.04-0.84, p=0.028); the effect of household income was attenuated after adjustment. Glycaemic control remains markedly poor among children and adolescents with T1DM in this Kenyan tertiary hospital setting despite structured programmatic support. Frequency of self-monitoring, rather than household income alone, was the factor most strongly associated with glycaemic control, suggesting that strengthening access to glucose-testing supplies and supporting their consistent use should be prioritised in care, alongside attention to socioeconomic barriers. Longitudinal studies are needed to confirm these associations.

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How continuous glucose monitoring may support behaviour change: perceived mechanisms and app feature attribution in a cross-sectional survey

Jospe, M. R.; Bohlen, L. C.; Crawshaw, J.; Somerville, J.; LaRegina, E.; Willis, H. J.; Gustafson, S. K.; Schembre, S. M.

2026-10-21 endocrinology 10.64898/2026.10.19.26365948 medRxiv
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Aims: To understand how users believe continuous glucose monitoring (CGM) changes their behaviour, which app features they credit, and whether endorsing more mechanisms of action (MoAs) is linked to reported diet and physical activity change. Methods: We surveyed 112 U.S. adults with type 1 or type 2 diabetes who had used a Dexcom or Abbott Libre CGM within 12 months. Participants rated 26 MoA statements mapped to the Capability, Opportunity, Motivation-Behaviour (COM-B) model, identified contributing app features, and reported CGM-attributed diet and physical activity change. Logistic regression examined MoA count and COM-B domains as predictors of behaviour change. Results: Participants (mean age 54.5 years; 60.7% female) reported dietary (82.1%) and physical activity (46.4%) change and endorsed a median of 18 MoAs, most often relating to knowledge, skills and behavioural consequences. Real-time glucose and graphs were attributed to many MoAs. Each additional MoA was associated with higher odds of dietary (OR 1.27, 95% CI 1.15-1.44) and physical activity change (OR 1.27, 95% CI 1.16-1.43). Motivation made the strongest distinct contribution among COM-B domains. Conclusions: Users perceive CGM as engaging many behavioural mechanisms; endorsing more was linked to behaviour change. Motivation may be a key target for CGM-based behavioural support.

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Diagnostic Accuracy of Fine Needle Aspiration Cytology in Thyroid Diseases: Comparison with Histopathological Findings in Hawassa, Ethiopia

Nisro, A. M.; Geremew, T. T.; Tadele, A. K.; Fenta, B. D.; Engida, G. G.; Lukas, F. Y.; Tesgera, T. G.; Alem, A. T.

2026-10-21 pathology 10.64898/2026.10.16.26365726 medRxiv
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Introduction: Thyroid diseases are major health problems and among the most common endocrine disorders worldwide, including in Ethiopia. They are characterized by alterations in hormone secretion, enlargement of the thyroid gland, or both. Fine needle aspiration cytology is an important initial screening tool, and histopathologic examination is essential for the definitive diagnosis of thyroid disease. This study aimed to compare the diagnostic accuracy of fine needle aspiration cytology with histopathology in identifying thyroid diseases. Methods: A cross-sectional study was conducted at three health facilities in Hawassa City, Ethiopia, involving 304 patients who underwent both thyroid fine needle aspiration cytology and histopathologic examination of the same site between 30th October 2024 and 29th October 2025. FNAC results were classified using the Bethesda system, with histopathology as the gold standard. Data were entered into Kobo Toolbox, exported to SPSS version 27, and analyzed using cross-tabulation and chi-square ({chi}{superscript 2}) tests to determine diagnostic accuracy. Result: 304 patient records were included in the study. The fine needle aspiration cytology was determinate/diagnostic in 81.6% of cases. The study revealed the sensitivity and specificity of fine needle aspiration cytology to be 88.2% (CI 77.6-95.1%) and 94.4% (CI 90.6-97.1%), respectively. The false negative and false positive rates in this study were 2.4% and 4.4%, respectively. The positive predictive value was 80.3% (CI 68.7-89.3%), and the negative predictive value was 96.8% (CI 93.8-98.7%). The accuracy of fine needle aspiration cytology in differentiating benign from malignant thyroid lesions was 93.1%. Conclusion: FNAC demonstrated strong agreement with histopathology and remains a reliable, cost-effective first-line diagnostic tool for thyroid disease, particularly in resource-limited settings. Strengthening sample handling, ultrasound guidance, and adherence to Bethesda criteria may further improve diagnostic precision

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Heart rate rises most during REM sleep after semaglutide initiation: a matched longitudinal cohort study

Krongauz, D.; Kohn, S.; Zulti, A.; Schlesinger, Y.; Godneva, A.; Talmor-Barkan, Y.; Segal, E.

2026-10-20 pharmacology and therapeutics 10.64898/2026.10.18.26365823 medRxiv
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Study Objectives: Glucagon-like peptide-1 (GLP-1) receptor agonists raise resting heart rate. We asked whether, after semaglutide initiation, the increase is larger during rapid eye movement (REM) sleep than during non-rapid eye movement (NREM) sleep. Methods: In the Human Phenotype Project, an Israeli cohort of generally healthy adults aged 40 to 70 years, 96 of 494 self-reported semaglutide initiators had a home sleep study (WatchPAT; sleep stages estimated from peripheral arterial tone and actigraphy) before and at least three months after starting. Each was propensity-matched 1:1 to a never-user of GLP-1 drugs measured at the same visits. We estimated the initiators' change minus their controls' change (difference-in-differences). The REM minus NREM contrast was designated primary after an exploratory analysis. Results: Relative to controls (90 to 94 pairs), heart rate rose during nocturnal wake (+3.89 beats per minute [bpm], 95% confidence interval 2.35 to 5.44), NREM sleep (+4.82 bpm, 3.12 to 6.52) and REM sleep (+6.25 bpm, 4.42 to 7.91); the REM increase exceeded the NREM increase by 1.42 bpm (0.98 to 1.89). The excess persisted across matching designs and on a relative scale; the proportion of REM sleep did not change. Never-users with similar weight loss showed no REM sleep heart-rate rise (+0.40 bpm, -0.63 to 1.50). Heart-rate variability decreases disappeared after adjustment for heart rate. Conclusions: Semaglutide initiation was associated with higher heart rate throughout sleep, most during REM sleep, unexplained by weight loss. Clinic measurements may understate this effect. Confirmation with polysomnographic staging is needed.

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Rare variant burden complements polygenic risk in breast cancer and is associated with earlier diagnosis

Yu, Z.; Dong, Y.

2026-10-21 genetic and genomic medicine 10.64898/2026.10.17.26365799 medRxiv
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Breast cancer affects approximately one in eight US women during their lifetime, and about 10% of new cases occur before age 45. Polygenic risk scores (PRS) are associated with breast cancer risk, and previous studies have evaluated PRS alongside pathogenic-variant carrier status. Whether a continuous, gene-effect-weighted rare-variant burden adds information beyond PRS, and whether the two genetic measures relate similarly to diagnosis age, remain unclear. We studied these questions using whole-genome sequencing and electronic health record data from roughly 8,000 breast cancer cases and 134,727 controls of genetically inferred European ancestry in the All of Us Research Program. In joint case-status models, increase in PRS and rare-variant burden (Burdenrare) was associated with higher odds of breast cancer (odds ratios, 1.55 and 1.27, respectively). Adding both scores and their interaction to covariates increased the cross-validated area under the receiver operating characteristic curve from 0.745 to 0.782. The PRS odds ratio differed between noncarriers and carriers (1.56 versus 1.25), suggesting that their effects are not simply multiplicative. We then examined whether the same genetic measures were associated with recorded age at diagnosis among cases. In eligible cases, each standard deviation increase in Burdenrare was associated with diagnosis 1.82 years earlier, compared with 0.43 years earlier for PRS. The proportion carrying a qualifying rare variant decreased from 26.5% among cases diagnosed before age 35 to 3.2% among those diagnosed at age 70 or older. Higher breast cancer risk can itself produce an earlier mean diagnosis age among cases, so we compared observed age associations with those expected from age-scale risk models under age-constant hazard ratios. Notably, the PRS association was consistent with its risk-based expectation, whereas the Burdenrare association was stronger than expected. In this common whole-genome sequencing framework, the weighted rare-variant burden adds information beyond PRS for breast cancer case status and shows a more pronounced association with early diagnosis, guiding future studies of risk and diagnosis timing.

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Association between Resilience and Financial Toxicity: The Moderating Role of Age, Race and Socioeconomic Factors

Zhan, Y.; Wells, R.; Knobf, T.; Shan, L.; Lustberg, M. B.; Wang, H.-L.

2026-10-21 nursing 10.64898/2026.10.19.26365649 medRxiv
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PURPOSE: Women with metastatic breast cancer (MBC) are at risk of developing financial toxicity due to prolonged treatment. Resilience has been identified as a key protective factor associated with better quality of life among cancer populations. However, it is unknown if resilience is associated with financial toxicity. We sought to examine the relationship between resilience and financial toxicity among women with MBC and explore whether socioeconomic factors moderate this association. PATIENTS AND METHODS: Our sample included 209 women with MBC who completed self-reported questionnaires of the Resilience Scale Specific to Cancer (RS-SC) and the Comprehensive Score for Financial Toxicity (COST). Participants (n=2) with missing data were excluded from analysis. We conducted multiple linear regression to examine the association of resilience with financial toxicity. Interaction terms were used to test moderating effects of age (18-39, 40-64 and > =65 years), race, education, health insurance, household income and employment status. RESULTS: Of the sample, 56.5% were aged 40-64 years, 76.6% were White, and 79.9% had a college or master degree or above. Women reported moderately high resilience with mean RS-SC score of 34.49 (SD = 6.67), and moderate financial toxicity (mean COST score =21.01 [SD = 10.51]). Adjusting for covariates, higher resilience was linked to better financial well-being (b = 0.37, SE= 0.11, 95% CI [0.14, 0.59], P < 0.01). Age, education and health insurance moderated this relationship, with resilience more strongly associated with better financial well-being among those aged 40-64 years, with college/master degree or above and private insurance. Race, household income, and employment status did not moderate the association between resilience and financial toxicity. CONCLUSION: Women with MBC who reported higher resilience are more likely to experience better financial well-being, but the strength of this association varied by socioeconomic factors. Further research is needed to confirm these findings. Our results have important implications for incorporating resilience into financial toxicity interventions and tailoring such interventions based on individual socioeconomic characteristics.

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Can identifying recent Mycobacterium tuberculosis infection support faster tuberculosis vaccine trials?

Hadley, L.; Brown, T. S.; Nelson, K.; Kissler, S. M.

2026-10-21 infectious diseases 10.64898/2026.10.19.26365122 medRxiv
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Background: TB vaccine development is hampered by the natural history of M. tuberculosis: most infected people rarely progress to disease, so trials must be very large and long to accrue sufficient disease endpoints. Current trials enrol IGRA-positive participants (IGRA: Interferon-Gamma Release Assays), but IGRAs remain positive for many years and cannot distinguish recent from remote infection. Tests for recent infection are now in development, and we argue they could make trials substantially more efficient. Here, we investigate how screening participants prior to enrolment with a test for recent M.tb infection could impact the total number of enrollees required for an adequately-powered TB vaccine trial. Methods: Using a statistical model of vaccine trial recruitment, we estimated the number needed to contact, test, and enrol to achieve an 'effective' trial (defined as 50 disease endpoints), under IGRA-gated enrolment (life-long duration of positivity) vs. enrolment with a test for recent infection. We considered five recruitment strategies: non-test-based enrolment for ages 15-49, ages 12-34, and household contacts of recent cases; and test-based enrolment using IGRA, and a test for recent infection with two-year duration of positivity. The model explored trial recruitment in South Africa, Kenya, and India. Results: Compared with an extended-positivity test, a test for recent infection reduced the median number needed to enrol by 4.2- to 6-fold under favourable conditions. It also outperformed non-test-based strategies, including enrolling household contacts. This comes at the cost of substantially more testing, but crude estimates suggest recency-based enrolment would still be cheaper overall provided the new test does not cost more than roughly 5-10 times an IGRA. Conclusions: Diagnostics for recent M.tb infection have the potential to improve vaccine trial efficiency, but more research is now needed to understand test characteristics and to evaluate their use in this setting. Our Viewpoint sets out the test attributes that would need to be established, such as time to positivity, duration of positivity, sensitivity, and specificity, before such tests could be used in vaccine trials.

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The Th17/IL-17 Axis and Systemic Inflammatory Biomarkers in Sepsis-Associated Encephalopathy and Delirium: A Systematic Review and Meta-Analysis

Chaves Filho, A. M.; Nascimento, E. F.; Goncalves, L. D. C.; Dias Filho, F. J.; Oliveira, T. Q.; Macedo, D. S.; Dal-Pizzol, F.; de Moraes, M. E. A.; Barichello, T.

2026-10-21 intensive care and critical care medicine 10.64898/2026.10.16.26365073 medRxiv
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OBJECTIVE: Sepsis-associated encephalopathy (SAE) and sepsis-associated delirium (SAD) lack confirmatory laboratory tests or biomarkers. We evaluated whether the Th17/interleukin (IL)-17 axis or neuroglial-injury biomarkers reflect acute brain dysfunction beyond systemic inflammation and whether biomarker profiles differ between these phenotypes. DATA SOURCES: EMBASE, MEDLINE/PubMed, and the Cochrane Library from inception to August 1, 2026, supplemented by backward and forward citation searching, following PRISMA 2020. STUDY SELECTION: Observational studies of adults with sepsis classified by SAE or SAD status and reporting circulating biomarker concentrations by neurological group or biomarker-outcome associations. Eighteen studies (2,388 participants; 1,863 with sepsis) were included. DATA EXTRACTION: Two reviewers independently extracted study, phenotype, assay, and outcome data. Risk of bias was assessed with the Newcastle-Ottawa Scale and certainty with GRADE. DATA SYNTHESIS: Random-effects models pooled standardized mean differences (SMDs) separately against non-septic and septic controls and odds ratios (ORs) for biomarker-outcome associations. IL-6 was the only mediator elevated in both comparative frameworks and associated with outcomes (non-septic controls: SMD, 0.54 [0.25-0.82]; septic controls: SMD, 1.05 [0.51-1.59]; OR, 1.85 [1.50-2.29]). S100B, neuron-specific enolase, IL-10, tumor necrosis factor; and interferon-gamma; were elevated versus septic controls, whereas IL-17 was modestly elevated only versus non-septic controls (SMD, 0.37 [0.01-0.73]). The IL-6 septic-control effect was concentrated in SAE (p<0.0001) and remained robust in leave-one-out and risk-of-bias sensitivity analyses. Certainty was low to very low, and all 14 computable prediction intervals included the null. CONCLUSIONS: IL-6 emerges as the leading circulating candidate biomarker of sepsis-associated brain dysfunction, while S100B and NSE capture neuroglial injury beyond sepsis. Current evidence does not establish a discriminating role for the Th17 axis. Future studies require standardized neurological phenotyping and appropriately matched septic controls to establish diagnostic value.

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Roles, Challenges, and Solutions for Maternal and Child Health in rural Communities in Bangladesh

Abdullah, A. S.; Halim, A.; Haq, F.; Sayem, A. S. M.; Dalal, K.

2026-10-21 public and global health 10.64898/2026.10.18.26365859 medRxiv
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Background Despite substantial improvements in maternal and child health over the past two decades, preventable maternal and neonatal morbidity and mortality remain major public health concerns in rural Bangladesh. Community-based interventions involving Community Volunteers (CVs), Community Groups (CGs), and Community Support Groups (CSGs) have been introduced to strengthen maternal and child health (MCH) services through health promotion, community engagement, and improved linkage with primary healthcare facilities. This study explored the roles, challenges, and opportunities of these community-based platforms in improving maternal and child health services. Methods A qualitative study was conducted in Kalaroa Upazila of Satkhira District, Bangladesh, between July and October 2020. Data were collected through focus group discussions and in-depth interviews with mothers, Community Volunteers, Community Group members, and Community Support Group members. Participants were purposively selected to capture diverse experiences from intervention and comparison areas. Interviews were conducted using semi-structured guides, audio-recorded with informed consent, transcribed verbatim, translated into English, and analyzed thematically using an inductive approach. Results Participants from intervention areas demonstrated greater knowledge of birth preparedness, antenatal care, pregnancy danger signs, institutional delivery, postnatal care, and newborn care than those from comparison areas. Community Volunteers, CGs, and CSGs played important roles in identifying pregnant women, conducting household counselling, promoting skilled maternal healthcare, facilitating referrals, and strengthening community participation. Participants perceived that these activities increased maternal awareness, improved health-seeking behaviour, and enhanced utilization of maternal and newborn health services. However, persistent barriers, including socio-cultural beliefs, financial constraints, transportation difficulties, shortages of skilled healthcare providers, and inadequate logistical support for community volunteers, continued to limit equitable access to quality services. Participants recommended strengthening community awareness programmes, improving community clinic readiness, enhancing referral systems, and providing regular training and supportive supervision for community-based health workers. Conclusions Community-based maternal health interventions involving Community Volunteers, Community Groups, and Community Support Groups contribute to improved maternal knowledge, health-seeking behaviour, and utilization of essential maternal and newborn health services in rural Bangladesh. Sustaining these gains will require stronger primary healthcare services, continued community engagement, and targeted strategies to address persistent health system and socio-cultural barriers. These findings provide important evidence for strengthening community-based maternal and child health programmes in Bangladesh and similar resource-constrained settings.