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Medicine

Ovid Technologies (Wolters Kluwer Health)

Preprints posted in the last 30 days, ranked by how well they match Medicine's content profile, based on 31 papers previously published here. The average preprint has a 0.06% match score for this journal, so anything above that is already an above-average fit.

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Effects of Opioid-free Anaesthesia on Postoperative Delirium after Gastrointestinal Surgery in Frail Elderly Patients: A Study Protocol for A Single-centre, Prospective, Randomized Controlled Trial

Liu, Q.; Yang, X.; Zhang, Q.; Zhang, M.; Wu, J.; Du, Y.; Li, Y.; Chen, L.; Gao, X.; Feng, Y.; Song, S.; Sun, X.; Li, Z.; Cheng, L.; Li, Y.; Liu, M.; Sun, Y.

2026-08-13 anesthesia 10.64898/2026.08.12.26360246 medRxiv
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Introduction: The incidence of postoperative delirium (POD) is high in frail elderly patients who have undergone gastrointestinal surgery, and POD significantly increases the risk of complications and medical burden. Opioid-free anaesthesia (OFA) involves a multimodal analgesic strategy, which may help to reduce the risk of POD. However, relevant studies focusing on frail elderly patients are still limited. This study aims to investigate the effect of OFA on the occurrence of POD in frail elderly patients after gastrointestinal surgery. Methods: This single-centre, prospective, randomized controlled trial (RCT) will be conducted at the First Affiliated Hospital of Shandong First Medical University, China. A total of 44 frail elderly patients aged 65 years or older who plan to undergo elective gastrointestinal surgery (modified frailty index (mFI > 0.27) will be randomly assigned to either the OFA group (receiving dexmedetomidine, esmolol, and ketamine) or the opioid-based anaesthesia (OBA) group. The primary outcome is the incidence of POD within 7 days after surgery or at discharge. Secondary outcome measures include the perioperative stress response, inflammation, intraoperative haemodynamics, postoperative 30-day all-cause mortality, intraoperative haemodynamic changes, 15-item quality of recovery (QoR-15), and postoperative complications during hospitalization. This study focuses on frail elderly individuals (a high-risk population) and aims to investigate the potential benefits of the OFA strategy in reducing the incidence of POD by reducing exposure to opioids through multimodal analgesia. If positive results are obtained in this study, they may provide new evidence for optimizing the perioperative management of such patients. This study is a single-centre, prospective RCT, and the results can provide preliminary evidence for subsequent studies to be performed on a larger scale. Discussion: This study focuses on frail elderly individuals (a high-risk population) and aims to investigate the potential benefits of the OFA strategy in reducing the incidence of POD by reducing exposure to opioids through multimodal analgesia. If positive results are obtained in this study, they may provide new evidence for optimizing the perioperative management of such patients. This study is a single-centre, prospective RCT, and the results can provide preliminary evidence for subsequent studies to be performed on a larger scale. Trial registration: NCT07603596.

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The impact of Anxiety, Sleep Quality, Social Media Use, and Socioeconomic Background on Academic Performance in Bangladeshi Public University Students: A Structural Equation Modeling Approach

Tasnim, S.; Ahmed Rana, S.; Hossen, M. A.; Rahman, M. A.

2026-08-19 health systems and quality improvement 10.64898/2026.08.18.26360659 medRxiv
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Background: Academic achievement is crucial for university students, but various factors affect their performance. This study explores the impact of anxiety, sleep quality, social media use, and socioeconomic status on academic performance (CGPA) among public university students in Bangladesh. Data and Methods: Data were collected from 225 students using a structured questionnaire that assessed anxiety (GAD-7), sleep quality (PSQI), social media use (SMUQ), and socioeconomic status (income, parental education). Structural Equation Modeling (SEM) was used to analyze the relationships between these variables. Outcomes: The results showed that socioeconomic status had a strong positive effect on academic performance ({beta} = 0.745, p < 0.001), while anxiety negatively impacted academic outcomes ({beta} = -0.675, p < 0.001). Sleep quality was positively related to academic performance ({beta} = 0.113, p < 0.05), but with a weaker effect. Social media usage is found to have a negative significant effect on academic performance ({beta} = -0.137, p < 0.001). Conclusion: These findings highlight the importance of controlling social media usage and anxiety to enhance academic performance among adult students. Sleep quality and socioeconomic background of the students are also found to be meaningfully associated with their educational progress.

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Prospective study on the organization and efficiency of online journal club

Burlov, N.; Baranovskii, M.; Burlova, E.; Slavenko, M.; Khrykov, G.

2026-08-12 medical education 10.64898/2026.08.11.26360192 medRxiv
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Background. Journal clubs (JCs) are a popular education format. Interest in studying their impact is high, and authors often report positive results related to subjective parameters. Objective assessments of effectiveness are limited and contradictory. In this paper, we share our experience and describe our journal club effectiveness. Methods. We conducted a prospective cohort study within our online journal club. Meetings followed a discussion-based format and were held via Zoom, with timing and topics determined by voting in the club Telegram chat. Enrolment occurred in waves and included an application, entry test, and interview. During each recruitment wave, both club members (treatment group) and applicants (control) completed an admission test assessing knowledge of evidence-based medicine and statistics. Results. The JC currently comprises 27 members. Over the past year, 76 meetings were held, with 75% of participants grading their experience with 9 or 10 on a ten-point scale. Multivariate analysis demonstrated non-significantly results (SMD = 0.19 (95% CI 0.004; 0.38), p = 0.046) among participants. However, in other adjusted models, differences between groups were not statistically significant (p > 0.05). Conclusion. While the analysis of the subjective outcomes is consistent with findings from previous studies, the objective outcomes remain inconclusive. Further research is needed to refine the methodology for the organization and evaluation of journal clubs.

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Charting Champions: Online Coaching to Reduce Physician Administrative Burden and Improve Well-Being

Smith, S. J.; Lemoine, D.

2026-08-10 health systems and quality improvement 10.64898/2026.08.05.26359826 medRxiv
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Objective: To assess the efficacy of an executive peer coaching program, Charting Champions Program (CCP), in helping physicians manage their administrative workload, thereby improving time management, workflow and well-being. Findings: In this longitudinal survey study, physicians self-reported significant improvements in completing charting and administrative paperwork during their clinical day. Physicians reported significant improvements in mental, cognitive and emotional states after the program. Meaning: The Charting Champions Program is an effective intervention that supports physicians in problem-solving the administrative burden of their clinical day, improving workflow efficiency, completing administrative requirements during clinical hours, and enhancing work-life balance and personal satisfaction. Background: Physicians are subject to high levels of mental, physical, and emotional stress, partly due to increasing administrative burdens. Online coaching is a proven intervention to help physicians improve workflow efficiency, reduce administrative burden and improve job satisfaction. Design: This voluntary longitudinal survey took place between 2020 and 2023. Physicians were asked to complete a survey at program entry and again 30-90 days after program completion. The survey consisted of 14 Likert scale questions, and a final sample of 280 physicians completed both surveys. Intervention: CCP contains modules that teach workflow improvements for clinical days, including timely charting, administrative task workflow, managing patient consultations and reducing interruptions. Interventions include self-paced modules, live coaching, recordings and an online peer community. Results: Post-CCP physicians reported a significant decrease in hours spent charting (P<0.0001) and completing clinical paperwork outside of clinical hours (P<0.006). Physicians also reported a decrease in work-related dread (P<0.001), feelings of burnout (P<0.001), and thoughts of quitting due to administrative burdens (P<0.001). Physicians felt more focused at work (P<0.001), felt more in control of the clinical day (P<0.001), and rated their mental energy at work higher (P<0.001). The program did not affect the number of patients seen in a full clinical day (P > 0.918). Conclusion and Relevance: The CCP reduces the time physicians spend on tasks outside of clinical hours, increasing free time without decreasing the number of patients seen per day.

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Patient safety culture, teamwork, and observed perioperative safety compliance in a high-volume surgical unit

Sahputri, V.; Angeline, A.; Tenggono, E.

2026-09-02 health systems and quality improvement 10.64898/2026.08.31.26361796 medRxiv
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Perioperative safety checklists standardize critical actions, but reliable completion depends on the surrounding work system and team behavior. We conducted a prospective observational analytic study from April to May 2026 in the central surgical unit of a high-volume public teaching referral hospital in Indonesia to examine whether patient safety culture and teamwork were associated with directly observed perioperative safety compliance and whether teamwork mediated the culture-compliance relationship. Patient safety culture was measured with the Hospital Survey on Patient Safety Culture 2.0, teamwork with a 35-item TeamSTEPPS Teamwork Perceptions Questionnaire research adaptation, and compliance by direct role-based observation using a 45-item checklist derived from the AORN Comprehensive Surgical Checklist. Eighty of 92 recruited professionals contributed 240 person-operation observations across 50 operations. Overall compliance was 74.75%, with sign-out lowest at 70.68%. Patient safety culture was associated with teamwork ({beta} = 0.590; 95% CI 0.510-0.770) and directly with compliance ({beta} = 0.407; 95% CI 0.187-0.712). The teamwork-compliance coefficient was positive ({beta} = 0.285; p = 0.046), but the prespecified percentile 95% CI included zero (-0.045 to 0.517). The indirect effect through teamwork was not supported ({beta} = 0.168; p = 0.079). These findings support a system-level interpretation of perioperative safety and identify learning-oriented responses to error, situation monitoring, and sign-out fidelity as measurable targets for future improvement efforts.

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Increasing Lung Cancer Screening Participation Using an Informational Video Nudge: A Randomized Feasibility Trial

Wain, K. F.; Carroll, N. M.; Maclennan, A. J.; Hixon, B.; Steiner, J.; Ritzwoller, D. P.

2026-09-01 health systems and quality improvement 10.64898/2026.08.28.26361654 medRxiv
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Purpose: Lung cancer screening (LCS) with low-dose computed tomography (LDCT) reduces lung cancer mortality, yet screening participation remains low. We evaluated whether a brief informational video nudge delivered immediately before a scheduled clinical encounter increased LCS ordering and baseline LCS completion. Patients and Methods: We conducted a randomized feasibility trial within Kaiser Permanente Colorado from March through October 2025. LCS-eligible patients with an upcoming primary care or pulmonology appointment were assigned to intervention or usual care based on birth month. Intervention patients were split into two group, a group who received the LCS informational video nudge via text message within 24 hours of an eligible appointment; and second group who received the text plus a QR code video link during appointment rooming. Outcomes included LCS orders, baseline LCS-LDCT completion, and video engagement. Multivariable logistic regression was used to evaluate factors associated with LCS ordering. Results: Among 1,093 patients, 549 were assigned to intervention and 544 to usual care. Intervention patients were more likely to receive an LCS order within 1 day of their appointment (22.6% vs 16.4%; p=.010) and any time during follow-up (32.6% vs 24.1%; p=.002). Baseline LCS-LDCT completion was 51% higher in the intervention group, although the difference was not statistically significant (8.6% vs 5.7%; p=.078). Among the intervention group, 93 individuals (17%) viewed the video, generating 114 total views, and viewers watched an average of 79% of the video. Most views (82.5%) occurred through text-message delivery rather than QR codes. Conclusion: A brief, low-burden LCS informational video delivered immediately before a clinical encounter and integrated into existing workflows significantly increased LCS ordering and was associated with higher screening completion. Timely, scalable digital nudges may provide an effective strategy for improving LCS participation. Based on the observed effectiveness, feasibility, and efficiency of the intervention, KPCO incorporated the behavioral nudge into standard clinical care in February 2026.

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Clinical outcomes and its determinants among neonates with neonatal sepsis admitted to selected Governmental hospitals in Addis Ababa, Ethiopia.

Gutema, R. M.; Namara, G. T.

2026-08-12 pediatrics 10.64898/2026.08.10.26360094 medRxiv
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Abstract Background: Even though significant advances in diagnosis, treatment, and prevention strategies have been implemented, neonatal sepsis remains a common concern in clinical practice, especially in low-resource countries. It is one of the major causes of death during the first month of life. This study aimed to assess clinical outcomes and predictors of mortality among neonates with neonatal sepsis admitted to public hospitals in selected Hospitals in Addis Ababa, Ethiopia. Methods: A hospital-based prospective cohort study design was conducted among 466 neonates admitted with neonatal sepsis from September 2024 to January 2025. All neonates who were admitted to selected Hospitals of Addis Ababa city after being clinically or laboratory-diagnosed with neonatal sepsis by the attending physician were included in the study. Data were entered into EpiData 4.2 and analyzed by SPSS version 26. Bivariate and multivariate Cox regression were used to identify the relationship between dependent and independent variables. Finally, variables with p-value [&le;] 0.05 were taken as significant factors associated with poor clinical outcome. Results: The study was conducted among 466 neonates admitted with neonatal sepsis. Of all neonates admitted with neonatal sepsis, 372 (79.8%) were discharged with good outcomes, and 94 (20.2%) had a poor outcome/died. Duration of ruptured membrane being >12hr (AOR=7.02, 95 % (CI: 1.85, 26.57), marital status /divorced (AOR=3.12, 95 % (CI: 1.67, 7.45),rural residence (AOR= 6.05, 95 % (CI: 2.03-16.53), assisted instrumental delivery (AOR= 5.99, 95 % (CI: 1.46-17.11), meconium-stained amniotic fluid ((AOR= 9.48, 95 % (CI: 0.49-18.61)), no initiate exclusive breast feed within one hour (AOR= 3.20, 95 % (CI: 0.90-7.52), chest in drawing (AOR= 5.81, 95 % (CI: 1.75-11.23) were significantly associated with neonatal mortality. Conclusion: Neonatal mortality was moderately high. Meconium-stained amniotic fluid, prolonged duration of ruptured membrane (>12hr), Mode of delivery (instrumental delivery), and chest in drawing are among the predictors of neonatal mortality. Keywords: -Clinical outcome,Neonatal sepsis, Mortality, predictors, Ethiopia.

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Peripheral Airway Dysfunction in Symptomatic Gastroesophageal Reflux Disease: A Laboratory-Based Study Using Impulse Oscillometry

Illangasinghe, T.; Devanarayana, N. M.; Wadasinghe, D.; Kumari, M. V.

2026-08-26 respiratory medicine 10.64898/2026.08.24.26361198 medRxiv
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Introduction Individuals with Gastroesophageal Reflux Disease (GERD) often experience airway inflammation and bronchoconstriction as a result of reflux aspiration and/or vagally mediated reflexes. The Impulse Oscillometry System (IOS) is a sensitive, non-invasive tool that can detect subtle changes in airway resistance. While there are few studies exploring airway resistance in GERD globally, no studies have been conducted in Sri Lanka. Therefore, we aim to compare the airway resistance using IOS in medical undergraduates with and without symptomatic GERD. Methods A cross-sectional study was conducted among 811 medical undergraduates (31.1% male; mean age 22.9 years) at the Faculty of Medicine, Rajarata University of Sri Lanka. Symptomatic GERD was screened using the validated GerdQ, and a cutoff of[&ge;]8 was used to diagnose those with GERD symptoms. Of the 242 (29.8%) with GERD symptoms, 188 with chronic respiratory diseases or recent respiratory symptoms were excluded, and 50 with GERD symptoms and 50 healthy, age- and sex-matched controls were recruited. Lung function was assessed using IOS and spirometry, according to American Thoracic Society (ATS) and European Respiratory Society (ERS) guidelines. Results Prevalence of symptomatic GERD among medical undergraduates was 29.8% (242/811). The common symptoms among GERD were heartburn (89.6%, 217/242) and regurgitation (85.5%, 207/242). Oscillometry parameters including, R5-R20 Hz (15.29% vs 9.69%, p=0.002), Fres (14.95 1/s vs 13.37 1/s, p = 0.04), and AX (0.66 vs 0.48, p = 0.02) were significantly higher in students with symptomatic GERD (mean = 15.29%) than in healthy controls (mean = 9.69%; p = 0.002). However, spirometry parameters including FEV1, FVC, and PERF did not differ between the GERD-positive and control groups. Conclusion Individuals with symptomatic GERD demonstrated a higher peripheral airway resistance compared to controls, whereas no significant difference was observed in upper airway resistance. This could be due to the gastric acid stimulation of vagal nerve terminations in the lower part of the esophageal wall, leading to increased resistance in the peripheral airways through vagally mediated bronchoconstriction.

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Establishment and Efficacy of an Endoscopic Pathogen Visualization Literacy (EPVL) Training Program for Gastroenterologists Based on Fluorescence Rapid On-Site Evaluation (ROSE) Technology

Zhang, L.; Hou, Y.; Li, B.; Wu, K.; Zhang, j.; Yang, M.

2026-08-13 medical education 10.64898/2026.08.12.26360123 medRxiv
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ObjectiveTo establish a standardized training program for endoscopic pathogen visualization literacy (EPVL) based on fluorescence rapid on-site evaluation (ROSE) technology for gastroenterologists, and to evaluate its training efficacy. MethodsA prospective quasi-experimental study was conducted. A total of 54 gastroenterology trainees were non-randomly allocated into the EPVL training group (Group A, n=28, 16-hour comprehensive training) and the control group (Group B, n=26, 3.5-hour traditional teaching). Pre- and post-training assessments included theoretical examinations, fluorescence ROSE image interpretation tests (30 parallel images per set), interpretation speed measurement, and clinical decision-making integration evaluation. The primary outcome was the change in image interpretation accuracy, analyzed by ANCOVA with pre-test scores as the covariate. ResultsBaseline characteristics were comparable between groups (P>0.05 for all demographic variables and pre-test scores). Group A showed significant improvement in image interpretation accuracy from 57.8{+/-}13.6% pre-training to 82.5{+/-}11.2% post-training (improvement of 24.7%, paired t=-12.86, P<0.001), while Group B improved from 58.5{+/-}13.0% to 71.0{+/-}13.5% (improvement of 12.5%, paired t=-5.24, P<0.001). After ANCOVA adjustment for pre-test scores, the between-group difference was significant (F(1, 51)=10.95, P=0.0017, 2=0.177), with Cohens d=0.94 (large effect size). Interpretation speed in Group A (19.2{+/-}2.8 s/image) was significantly faster than in Group B (32.5{+/-}6.0 s/image, t=-10.45, P<0.001). Clinical decision-making scores were significantly higher in Group A (80.5{+/-}8.0 vs. 65.3{+/-}11.5, t=5.60, P<0.001). The Kappa agreement with the gold standard in Group A improved from 0.56{+/-}0.18 to 0.84{+/-}0.11 (t=-8.35, P<0.001). Participant satisfaction exceeded 88%. ConclusionThe EPVL training program significantly improves gastroenterologists fluorescence ROSE image interpretation accuracy, speed, and clinical decision-making integration, providing a novel and effective standardized training paradigm for digestive endoscopy education.

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Burden of fatigue in compensated chronic liver disease: findings from the multinational a:GAP Study

Choudhuri, G.; Akhundova-Unadkat, G.; Naidoo, N.; Morales-Castillo, M.; Guillaume, X.; Duijnhoven, R. G.; Safaei, A.; Swain, M. G.

2026-09-02 gastroenterology 10.64898/2026.08.28.26361618 medRxiv
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Background & Aims: Fatigue is a central symptom of chronic liver disease (CLD), substantially impacting health-related quality of life (HRQoL). This study aimed to further understand CLD symptomatology, including fatigue, and its impact on HRQoL from a patient perspective. Methods: Abbott Global Assessment of Patients unmet needs (aGAP) was a multinational, cross-sectional survey in adults with compensated CLD in China, India and Mexico, conducted between July and November 2024. Adult participants who self-reported that they had physician-diagnosed CLD and were experiencing fatigue completed a quantitative survey to assess symptom burden and included three HRQoL patient-reported outcome (PRO) questionnaires (Patient-Reported Outcomes Measurement Information System [PROMIS]-29+2, Work Productivity and Activity Impairment - Specific Health Problem version 2.0 [WPAI: SHP], Multidimensional Fatigue Inventory [MFI]). Results: Overall, 505 participants (China: 200; Mexico: 105; India: 200) completed the study. Participants reported that their CLD-related fatigue sometimes, often or always affected their self-esteem/confidence (45.1%) and ability to maintain or acquire new employment (38.6%). Most participants reported moderate (51.3%) or serious (26.9%) fatigue, with 33.5% experiencing fatigue every day or almost every day. Many participants felt their social life was negatively impacted by their fatigue (47.3%) and that there were related financial difficulties (53.9%). Use of validated PRO tools demonstrated severe fatigue (MFI: overall mean [SD] 13.9 [3.4] general fatigue and 13.4 [3.6] physical fatigue) as well as substantial levels of work and activity impairment (WPAI: SHP overall mean [SD] 53.0 [26.4]) and high levels of anxiety, pain interference, depression and sleep interference (PROMIS T-scores [&ge;]54). Conclusions: Fatigue has a substantial impact on HRQoL among adults with CLD across several countries, highlighting a global unmet need for targeted interventions to effectively identify and manage the condition.

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Quantifying the Quality of Corrective Actions in Medical Safety Incident Reports Using a Hybrid Rule-Based and Large-Language-Model Classification System: A Cross-Sectional Pilot Feasibility Analysis of 11,507 Japanese National Reports (2010, Interim)

Sugawara, H.

2026-08-06 health systems and quality improvement 10.64898/2026.08.04.26359750 medRxiv
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Background: Whether corrective actions documented in medical safety incident reports rely on individual vigilance ("Safety-I") or on structural, system-level intervention ("Safety-II") has not been quantitatively evaluated on a national scale in Japan. We developed an automated classification pipeline to assign corrective-action free-text to a 7-level maturity scale (L0-L6) and computed two summary indices: the Safety Measure Quality Profile (SMQP), the full L0-L6 distribution, and the System-based Safety Measure Rate (SSMR), the proportion of non-L0 records classified L3-L6. Methods: We analyzed all 11,507 corrective-action free-text entries from the 2010 release of Japan's national medical accident and near-miss reporting database (Japan Council for Quality Health Care, JCQHC), comprising 8,804 near-miss (Hiyari-Hatto) and 2,703 accident (Jiko) reports. Records were classified using a five-stage hybrid pipeline: an expert-developed rule dictionary, TF-IDF + k-nearest-neighbor matching, cosine-similarity matching, a two-tier large-language-model (LLM) classifier, and a conservative priority-cascade fallback. SSMR was compared between near-miss and accident reports using a chi-square test, Wilson 95% confidence intervals, Cramer's V, and the risk difference (RD), against pre-specified minimal clinically important difference (MCID) criteria of RD >= 2 percentage points and Cramer's V >= 0.10. Results: Every record received a definitive L0-L6 label (0% unresolved). Overall, 16.6% of records were unclassifiable (L0); among the 9,599 classifiable (non-L0) records, individual-vigilance actions (L1) predominated (54.6% of all records), and only 11.82% (95% CI, 11.19-12.49%) met the SSMR criterion (L3-L6). SSMR was higher for accident reports than for near-miss reports (18.12% [95% CI, 16.69-19.64%] vs. 9.[95% CI,46% [95% CI, 8.80-10.17%]; RD = 8.66 percentage points; Cramer's V = 0.120; chi-square(1) = 136.97001), exceeding both pre-specified MCID thresholds. Conclusions: In this interim single-year analysis, the large majority of documented corrective actions in Japanese medical safety reports remained individual-vigilance-based rather than system-based, with accident reports showing a substantively, rather than merely statistically, higher proportion of system-based actions than near-miss reports. These findings support the feasibility of large-scale automated assessment of corrective-action quality and provide the rationale for the planned 16-year longitudinal analysis.

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Resident Physician Selection Practices and Professionalism-Related Difficulties in Japan: A Nationwide Cross-sectional Survey

Sekine, M.; Nishizaki, Y.; Watari, T.; Shikino, K.; Fukui, S.; Nagasaki, K.; Nojima, M.; Shimizu, T.; Yamamoto, Y.; Kobayashi, H.; Tokuda, Y.

2026-08-07 medical education 10.64898/2026.08.05.26359757 medRxiv
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Introduction: Postgraduate clinical training is crucial for developing professional competence, communication skills, and effective teamwork. Although resident physician selection is crucial, little is known about how Japanese residency programs select residents and whether selection practices are associated with difficulties during training. Methods: We conducted a nationwide cross-sectional survey of residency programs participating in Japan's 2023 General Medicine In-Training Examination (GM-ITE). Program directors completed a questionnaire assessing selection methods, interview content, quality-assurance measures, and resident difficulties, defined as at least one postgraduate year 1 or 2 resident physician receiving disciplinary action or a severe warning. Free-text responses were coded using the Situation, Task, Action, and Result framework. Associations between selection methods and resident difficulties were examined using adjusted logistic regression models controlling for hospital type and number of GM-ITE examinees. Results: Of 151 participating physician-selection programs, 150 provided valid responses. Interviews were used by 90.1% of programs and were identified as the most important selection component by 87.3%. Thirty-five programs (23.3%) reported difficulties with resident physicians, involving professionalism and workplace conduct including rule, ethics, or boundary violations, work avoidance or unavailability, and inappropriate communication. Use of applicants' pre-clinical-clerkship computer-based test scores as a selection criterion was associated with resident difficulties (adjusted OR, 4.60; 95% CI, 1.50-14.11; P = 0.008; FDR-adjusted P = 0.048). No significant associations were observed for essays, academic tests, medical school grades, or personality assessment. Program-level GM-ITE total and domain scores did not differ significantly between programs with and without reported resident physician difficulties. Discussion: Resident physician selection in Japan is highly interview-centered; reported difficulties were more often related to professionalism and workplace conduct than to knowledge deficits. Although these exploratory findings are program-level, they highlight the importance of strengthening the quality assurance processes in resident selection systems, particularly for assessing professionalism-related attributes in applicants.

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Exploring the negative triad of childhood maltreatment, fear of relapse, and low sleep quality in multiple sclerosis

Karabatsiakis, A.; Trepel, N.; Gander, M.; Buchheim, A.

2026-09-03 health systems and quality improvement 10.64898/2026.08.31.26361813 medRxiv
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Background: Multiple sclerosis (MS) is a chronic, immune-mediated disease of the central nervous system marked by demyelination and neurodegeneration. Beyond physical symptoms, MS is often linked to clinically relevant sleep disturbances. The variability and unpredictability of symptoms and disease progression can also fuel fear of relapse (FoR), undermining well-being and potentially increasing morbidity through inflammatory processes. Understanding biopsychosocial risk factors, including childhood maltreatment (CM) and sleep, in relation to FoR remains an important gap in MS management and research. Methods: Data from N = 48 participants were collected via an online survey. We used the Pittsburgh Sleep Quality Index (PSQI), the Fear-of-Relapse Scale (FoR), and the Childhood Trauma Questionnaire (CTQ) to assess the variables of interest. In addition, time points of exposure to different CM subtypes were assessed. Linear regression analyses were conducted to examine associations within the proposed negative triad. Results: A significant negative association between overall sleep quality and FoR was observed. In the total cohort, the interaction between CM and sleep was not a significant predictor of FoR. However, exploratory analysis revealed a significant interaction between CM and sleep among male participants, whereas the same interaction was not significant among female participants. Conclusion: A history of CM and impaired sleep quality introduce new stressors in managing one's own illness that have received little attention to date. However, the present study found that these factors were at least partly influential on the FoR. The results underscore the translational need for additional support services to enhance prevention and personalized care.

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Medial Plantar Nerve Shear Wave Elastography and Viscosity Imaging for Differentiating Mild from Moderate Diabetic Peripheral Neuropathy

Gao, X.; Li, Y.

2026-09-02 radiology and imaging 10.64898/2026.08.28.26361645 medRxiv
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Objective: To examine how medial plantar nerve shear wave speed (Cs) and viscosity coefficient (Vi) are associated with the severity of diabetic peripheral neuropathy (DPN), and to assess their ability to differentiate adjacent severity categories. Materials and Methods: Based on TCSS, the 113 patients with type 2 diabetes mellitus were assigned to the non-DPN (n = 33), mild DPN (n = 46), and moderate DPN (n = 34) groups. Medial plantar nerve Cs and Vi were measured using shear wave elastography and viscosity imaging. Receiver operating characteristic analysis evaluated Cs, Vi, and their logistic regression-based combination; areas under the curves (AUCs) were compared using DeLong tests. Results: Cs and Vi increased progressively across the three groups (both P < 0.001). For non-DPN versus mild DPN, the AUCs of Cs, Vi, and the combined model were 0.688 (95% CI, 0.604-0.772), 0.741 (0.660-0.822), and 0.745 (0.665-0.826), respectively, without significant pairwise differences. For mild versus moderate DPN, the corresponding AUCs were 0.707 (0.625-0.789), 0.794 (0.724-0.865), and 0.799 (0.731-0.867). The combined model outperformed Cs (P = 0.045), whereas Cs versus Vi and Vi versus the combined model did not differ significantly (P = 0.162 and 1.000, respectively). Conclusion: Medial plantar nerve Cs and Vi increased with DPN severity. Their combination improved discrimination between mild and moderate DPN compared with Cs alone but not with Vi alone. Quantitative medial plantar nerve viscoelastic assessment may complement clinical severity grading.

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Clinical equipoise and patient preferences for DOAC resumption after high-risk endoscopy: implications for a randomized trial

Smith, Z. L.; Elmunzer, B. J.; Forbes, N.; Ruff, C. T.; Hills, M. T.; Scholtens, D. M.

2026-08-17 gastroenterology 10.64898/2026.08.14.26360466 medRxiv
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Background Optimal timing for resuming direct oral anticoagulants (DOACs) after high-risk endoscopic procedures remains uncertain, and existing recommendations derive largely from expert opinion. The objective of this study was to characterize practice patterns and perceptions among endoscopists and outcome prioritization among patients with atrial fibrillation, in order to inform the design of the planned RESUME randomized trial. Methods We conducted parallel, cross-sectional surveys of practicing endoscopists and patients with atrial fibrillation using electronic questionnaires administered via Qualtrics. The endoscopist survey, distributed through the American Society for Gastrointestinal Endoscopy, assessed practice patterns, acceptability of early (postoperative day [POD] +1), intermediate (POD +3), and late (POD +5) resumption strategies, and perceptions of clinical equipoise. The patient survey, distributed through two advocacy organizations, assessed perceived confidence in existing guidance and prioritization of bleeding versus thromboembolic risk. Results A total of 201 endoscopists and 477 patients (92.5% taking a DOAC) provided evaluable responses. Endoscopists demonstrated wide variability in preferred timing of DOAC resumption after a standardized high-risk mucosal resection vignette, ranging from same-day resumption to delays beyond five days. POD +2 was the most commonly selected strategy, and most respondents rated more than one proposed RESUME trial arm as acceptable. Nearly all endoscopists (98.9%) rated a randomized trial to determine optimal timing as important. Patient preferences regarding bleeding versus stroke risk were heterogeneous and symmetrically distributed around the neutral response on a five-point ordinal scale. Preferences did not differ by prior stroke or transient ischemic attack, prior major bleeding, age, sex, or geographic region. More than half of patients (54.6%) reported being very or somewhat confident that clear guidance exists regarding DOAC resumption, despite the absence of high-quality randomized evidence informing this question. Conclusions Endoscopists demonstrate substantial practice variability and clinical equipoise, and patients demonstrate heterogeneous and balanced outcome preferences, regarding the timing of DOAC resumption after high-risk endoscopy. These findings support the ethical justification and relevance of the planned RESUME trial.

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Project ECHO for patients with chronic intestinal failure: Empowering people living with rare disease using a virtual telelearning model

Iyer, K.; Winkler, M.; Fisher, E.; Kumpf, V.; Nair, M.; Kakani, S.; Poindexter, K.; Jablonski, A.; Hoopes, E.; Ballog, P.; Nisenholtz, M.; Friebel, R.; Yiannoutsos, C.; Lai, J.; Tappenden, K.

2026-08-28 health systems and quality improvement 10.64898/2026.08.25.26361379 medRxiv
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Background: Chronic intestinal failure is a devastating rare disease in which patients require complex and life-saving parenteral nutrition or intravenous fluids delivered through a central venous catheter. There is a shortage of clinical expertise to manage chronic intestinal failure and patients in the United States lack access to the limited number of expert care centers. We developed a patient intestinal failure (PIF) ECHO intervention with patient advocates who have lived experience with the goal of connecting patients and family caregivers virtually to multidisciplinary intestinal failure experts for best practice learning. Objective: We pilot-tested the acceptability and feasibility of a direct-to-patient telelearning program based on the well-established ECHO Model focused on best practices in chronic intestinal failure care. Setting and Participants: 19 adults with chronic intestinal failure attended the pilot PIF-ECHO program for 12 consecutive weeks via Zoom between April and July 2026. All participants completed the post intervention questionnaire and 16 individuals participated in 3 focus groups. Design: A mixed methods evaluation was conducted. Questionnaires were assessed according to seven domains of the Theoretical Framework of Acceptability and qualitative data from the virtual focus groups were coded and analyzed using iterative thematic analysis. A data-derived PIF-ECHO logic model was developed to illustrate pathways between the program content and anticipated outcomes. Results: There was strong or very strong agreement that sessions were accessible, enjoyable, worth the time spent, and improved understanding of intestinal failure and its management. Information learned increased confidence for self-advocacy in navigating healthcare needs, disease and therapy self-management, and improved well-being. Interaction with facilitators, expert presenters, and peers was positive, judgement free, validating, and respectful. Participants felt empowered and reported lower levels of emotional strain due to the supportive resources and knowledge gained. Conclusions: A patient-facing tele-learning program in chronic intestinal failure is feasible, accessible, and acceptable to patients and appears to result in important short-term and medium-term benefits. The program was perceived as valuable and notably different from patient and peer-led support groups. The model could be applied more widely to other rare diseases. Lived Experience and Patient Contributions: Four patient advocates with lived experience in chronic intestinal failure were involved throughout the study including pre-study interviews and focus groups to inform PIF-ECHO design and content, recruitment, as presenters on topics of self-advocacy and role of patient support groups, and in the analysis and refinement of the program logic model. Their input shaped the relevance and acceptability of the PIF-ECHO pilot program. All four patient advocates fulfil uniform requirements for authorship and are co-authors on this paper. This work documents a meaningful partnership in the creation of a patient-facing virtual tele-learning adaptation of the ECHO model and establishes a valuable collaboration for future study of PIF-ECHO on a larger scale.

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Robustness Gap of Large Language Models in Nephrology

Soejima, A.; Kitano, F.; Ichikawa, D.; Shibagaki, Y.; Noda, R.

2026-08-18 nephrology 10.64898/2026.08.17.26360565 medRxiv
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Background: Whether benchmark performance reflects robust clinical reasoning rather than surface-level pattern recognition remains uncertain. We evaluated the robustness of state-of-the-art large language models (LLMs) on nephrology board renewal questions using "None of the other answers" (NOTA) substitution. Methods: From 210 Japanese Society of Nephrology board renewal questions (2014-2023), two nephrologists independently reviewed all items. Questions in which NOTA became the sole correct answer after replacement were included, yielding 145 validated questions. GPT-5, GPT-4o, Gemini 2.5 Pro, and Gemini 2.0 Flash were evaluated via application programming interfaces under default settings. The primary endpoint was accuracy, and paired differences were assessed using the exact two-sided McNemar test. Results: Accuracy was significantly lower after NOTA substitution for all models: GPT-4o, 66.21% to 19.31% (drop, 46.90 percentage points [pp]); GPT-5, 87.59% to 73.10% (14.48 pp); Gemini 2.0 Flash, 58.62% to 31.03% (27.59 pp); and Gemini 2.5 Pro, 86.90% to 55.86% (31.03 pp); all P < .001. GPT-5 showed the smallest decline and the highest accuracy in both versions. Conclusions: All evaluated LLMs showed a significant robustness gap after NOTA replacement. Newer models may be more robust, but multiple-choice accuracy remains an incomplete measure of clinical reasoning robustness.

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The Illusion of Understanding: A Randomized Controlled Trial of LLM-Generated Lay Summaries of Brain MRI Reports

Le Guellec, B.; Bentegeac, R.; Tran, V.-T.; El Homsi, M.; Amouyel, P.; Kuchcinski, G.; Hamroun, A.

2026-08-07 radiology and imaging 10.64898/2026.08.05.26359773 medRxiv
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Background: Large language models have been proposed to improve patient comprehension of radiology reports. However, whether they improve objective understanding remains unproven. Purpose: To evaluate the effect of appending an LLM-generated lay summary to brain MRI reports on objective and subjective patient comprehension in a randomized controlled trial. Materials and Methods: In this randomized controlled trial, 2,727 adult participants from the ComPaRe e-cohort were randomly assigned to interpret six standardized brain MRI reports for headache, presented either in their native format (control; n = 1,401) or appended with a lay summary generated by an open-weights LLM (Mistral Small 3.2) (intervention; n = 1,326). The primary outcome was objective comprehension, defined as the rate of correct classification of whether the report provided a probable explanation for the headache, with ground truth established by four-radiologist consensus. Secondary outcomes included satisfaction, subjective comprehension, anxiety, and willingness to contact a healthcare professional. Generalized estimating equations accounted for repeated within-participant observations. Results: A total of 2,727 participants (mean age, 52 years +/- 15; 75.2% women) were evaluated. Objective comprehension did not differ between arms (58.3% vs 59.4%; odds ratio (OR) 0.97; 95% CI: 0.90-1.06; P = .54). The intervention significantly improved overall satisfaction (64.9% vs 36.7%; OR 3.26; 95% CI: 2.93-3.64; P < .001) and subjective comprehension (50.3% vs 24.0%; OR 3.17; 95% CI: 2.82-3.56; P < .001). High anxiety was modestly reduced (25.1% vs 26.6%; OR 0.92; P = .037). The effect on objective comprehension varied by report type (P for interaction < .001): summaries improved comprehension of symptom-explaining reports (42.4% vs 37.4%; P < .001) but reduced it for normal reports (72.5% vs 76.6%; P = .001). Conclusion: LLM-generated lay summaries appended to brain MRI reports improved patient satisfaction and subjective comprehension but did not improve objective comprehension, indicating a gap between perceived and actual understanding that should be addressed before clinical integration.

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Precision Transfusion Management: Rh Phenotype Compatibility and Antibody Surveillance in Southern China

Huang, X.-q.; Li, L.-x.; Yang, Z.-Y.; Long, X.-X.; Lai, C.-Y.

2026-08-10 hematology 10.64898/2026.08.05.26359788 medRxiv
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Objective: To investigate the distribution frequencies of Rh blood group antigens (C, c, D, E, e) and phenotypes in the population of Hengyang, Hunan Province, and to analyze the production of Rh alloantibodies in repeatedly transfused patients, thereby providing a basis for developing precise transfusion strategies. Methods: Rh phenotyping, antibody screening, and antibody identification were performed on 3,635 hospitalized patients and 5,326 blood donors using Rh blood group typing cards. A blood transfusion management system was used to identify and track patients' historical specific antibodies, with automatic alerts for inconsistent results. Results: The antigen frequency distribution in patients was D (99.56%) > e (94.69%) > C (91.64%) > c (48.06%) > E (38.79%). The phenotypic distribution frequencies among Rh(D)-positive patients were as follows: CCDee (51.31%) > CcDEe (30.01%) > CcDee (9.37%) > ccDEE (5.00%) > ccDEe (2.79%) > CCDEe (0.80%) > ccDee (0.39%) > CcDEE (0.28%) > CCDEE (0.05%). From March to October 2023, after implementing Rh phenotyping and antigen-matched compatible transfusions for five antigens, the antibody screening positivity rate decreased to 0.97%, compared to 1.14% during the same period in 2022 (p < 0.05). Antibody identification in 276 antibody-positive samples revealed that alloantibodies against the Rh system accounted for the highest proportion (46.01%, 127/276), which was lower than the 55.21% observed in 2022 (p < 0.05). Unexpected antibodies in the Rh system were the primary cause of crossmatch incompatibility in clinical transfusions, accounting for 46.01%. Conclusion: Rh phenotyping and sustained antigen-matched compatible transfusions in repeatedly transfused patients can effectively prevent and reduce alloantibody production. Continuous tracking of specific antibodies and transfusion efficacy evaluation can be achieved through an efficient blood transfusion management system.

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Relationships of Preoperative and 24-Hour Postoperative Plasma and Cerebrospinal Fluid Cytokines with Postoperative Delirium

Devinney, M. J.; Simon, J. R.; Wright, M. C.; Chand, S.; Yu, C. T.; Herber, C. S.; Terrando, N.; Browndyke, J.; Whitson, H. E.; Cohen, H. J.; Huebner, J. L.; Klein, M. E.; Moretti, E.; Mathew, J. P.; Berger, M.

2026-08-14 anesthesia 10.64898/2026.08.12.26360137 medRxiv
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Background: Postoperative delirium is a common syndrome of acute changes in attention, cognition, and consciousness that may result from inflammation and/or neuroinflammation, but few studies have distinguished the relationships of preoperative and 24-hour postoperative systemic inflammation (i.e. in blood) versus neuroinflammation (i.e. in cerebrospinal fluid, or CSF) in postoperative delirium. Methods: We measured CSF and plasma cytokine levels before and 24-hours after non-cardiac/non-neurologic surgery in 199 patients age [&ge;] 60 years who were enrolled in two prospective cohort studies. Delirium was assessed with the confusion assessment method (CAM), 3-minute diagnostic interview for CAM-defined delirium, or the CAM for the Intensive Care Unit (CAM-ICU) in patients who remained intubated postoperatively and validated chart review. Cytokines were measured with immunoassays for IL-6, IL-7, IL-8, IL-10, IL-16, TARC, MCP-1, and IP-10. Associations of CSF and plasma cytokine levels with postoperative delirium were assessed with univariable and multivariable logistic regression analyses with Holm correction for family-wise error. Results: Surgery was associated with significant changes in nearly all measured CSF and plasma cytokines (p < 0.05) except plasma IL-16 and MCP-1. In multivariable analyses adjusted for preoperative Mini-Mental Status Exam (MMSE) score and surgery duration, higher preoperative CSF IL-6 (OR 1.80, 95% CI 1.18-2.75, Holm p=0.049) and CSF IL-8 (OR 1.94, 95% CI 1.22-3.06, Holm p = 0.040) levels were independently associated with postoperative delirium. Higher 24-hour postoperative CSF IL-10 was nominally associated with delirium (OR 1.57, 95% CI 1.06-2.33, p = 0.026) in a multivariable regression controlling MMSE and surgery duration, but this association did not remain significant after multiple-comparison correction (Holm p = 0.21). No other preoperative or 24-hour postoperative CSF or plasma cytokine levels were associated with delirium (p > 0.05). Conclusions: Surgery elicited robust postoperative changes in CSF and plasma cytokines, but 24-hour postoperative cytokine elevations were not significantly associated with postoperative delirium after multiple-comparison correction. In contrast, elevated preoperative CSF IL-6 and IL-8 levels were associated with postoperative delirium independent of baseline cognitive status and surgery duration. Thus, our findings support an important role for preoperative neuroinflammation in postoperative delirium in older elective surgery patients.