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Cureus

Springer Science and Business Media LLC

Preprints posted in the last 30 days, ranked by how well they match Cureus's content profile, based on 67 papers previously published here. The average preprint has a 0.18% match score for this journal, so anything above that is already an above-average fit.

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Effects of Topical Anesthetics on catheter-related bladder Discomfort in patients undergoing ureteroscopic litholapaxy: A Single-Center Randomized Controlled Study

Ma, C.; Wei, M.; Wang, Z.; Li, X.; Feng, Y.; Luo, Y.; Lu, X.; Wang, W.; Zhou, S.; Li, X.; Wang, F.; Liu, W.

2026-04-06 urology 10.64898/2026.04.04.26350148 medRxiv
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Background Urinary catheterization is a routine procedure after ureteroscopy lithotripsy URSL , but it often causes catheter-related bladder discomfort (CRBD) and urethral pain, which aggravates patients' postoperative discomfort. This study finds out the effect of topical anesthesia on CRBD and urethra pain in patients undergoing ureteroscopy lithotripsy and urinary catheterization. Methods In this study, 330 patients undergoing ureteroscopy lithotripsy enrolled, with 160 cases in the control group and 170 cases in the experimental group. The experimental group divided into two subgroups based on the local anesthetic used: Tetracaine Hydrochloride Gel subgroup and Oxybuprocaine Gel subgroup. Postoperative assessments conducted using CRBD scores and urethra pain numerical rating scale (NRS) score. CRBD and urethra pain NRS scores measured at T0, T1, T2, T3, T4, T5, and T6. Results Compared to the control group, the use of local anesthetics significantly reduced both CRBD scores and urethra pain NRS scores in the experimental group, with the differences being statistically significant (P < 0.01). In male patients, patients who used local anesthetics markedly decreased CRBD scores and urethra pain NRS scores compared to those not receiving local anesthetics, showing statistical significance (P < 0.01), whereas no significant difference followed in female patients. No statistically significant differences found between Rigid ureteroscopy lithotripsy R-URSL and Flexible ureteroscopy lithotripsy F-URSL) regardless of the use of local anesthetics. Within the experimental group, the effects of different local anesthetics were similar, with comparable impacts on CRBD scores and urethra pain NRS scores, and no statistical differences noted. These findings suggest that local anesthetics are effective in reducing postoperative CRBD scores and urethra pain NRS scores, especially in male patients. Conclusion Topical anesthesia following ureteroscopy lithotripsy reduces CRBD scores and urethra pain NRS scores in patients undergoing urinary catheterization, especially in male patients.

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An Exploratory Study on the Long-Term Impact of Voiding Cystourethrogram (VCUG)

McDonald, A.; Sullivan, K.

2026-04-17 pediatrics 10.64898/2026.04.15.26350983 medRxiv
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OBJECTIVE This study investigates the long-term impacts of childhood exposure to voiding cystourethrogram (VCUG), a diagnostic procedure for vesicoureteral reflux. Primary outcomes include long-term health outcomes, mental health disorders, healthcare avoidance, and participation in risky behaviors compared to a control group. METHODS A 9-month retrospective cohort study was conducted with adults who received most of their medical care in the U.S. Respondents self-reported health metrics, behaviors, and outcomes via a 20-minute survey. Respondents were divided into two groups: those who remembered undergoing at least one VCUG in childhood (VCUG group), and those who did not (control group). RESULTS Of 334 respondents, 204 (61%) were in the VCUG group (mean age: 29, 70% female) and 130 (39%) were controls (mean age: 34, 70% female). Notable findings include: 47% of VCUG respondents were diagnosed with depression compared to 27% of controls. 15% of female-born VCUG respondents reported they would never visit a gynecologist compared to 2% of controls. 34% of VCUG respondents smoked regularly compared to 5% of controls, and 11% of VCUG respondents regularly missed work compared to 1% of controls. These findings highlight the need for further research and clinical consideration of VCUG's long-term consequences. CONCLUSIONS This study suggests that the effects of childhood VCUG extend into adulthood. Our findings underscore the need to reassess informed consent protocols and consider full-scale studies to minimize bias.

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Assessing medication-related burden and medication adherence among older patients from Central Nepal: A machine learning approach

Giri, R.; Agrawal, R.; Lamichhane, S. R.; Barma, S.; Mahatara, R.

2026-04-23 geriatric medicine 10.64898/2026.04.22.26351447 medRxiv
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We are pleased to submit our Original article entitled "Assessing medication-related burden and medication adherence among older patients from Central Nepal: A machine learning approach" for consideration in your esteemed journal. In this paper, we assessed medication burden using validated Living with medicines Questionnaire (LMQ-3) and medication adherence using Adherence to Medication refills (ARMS) Scale. In this paper we analysed our result through machine learning approach in spite of traditional statistical approach to identify the complex factors influencing both. Six ML architectures (Ordinary Least Square, LightGBM, Random Forest, XGBoost, SVM, and Penalized linear regression) were employed to predict ARMS and LMQ scores using various socio-demographic, clinical and medication-related predictive features. Model explainability was provided through SHAP (Shapley Additive exPlanations). Our study identified the moderate medication burden with moderate non-adherence among older adults. Requiring assistance for medication and polypharmacy were the strongest drivers for the medication burden and non-adherence. The high predictive accuracy by ML suggests the appropriate clinical intervention like deprescribing to cope with the high prevalent medication burden and non-adherence among older adults in Nepal.

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What tools do men need to make an informed decision about germline genetic testing for prostate cancer: A qualitative and survey study

Raspin, K.; Bartlett, L.; Makin, J.; Wilson, R.; Butorac, K.; Roydhouse, J.; Dickinson, J. L.

2026-04-02 genetic and genomic medicine 10.64898/2026.03.27.26349466 medRxiv
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BACKGROUND: Prostate cancer (PrCa) is the most commonly diagnosed cancer in men in many countries and is the most heritable of the common cancers. Precision medicine approaches to disease management are not routinely available to most men, yet we know that germline genetic testing can help identify those at high-risk of developing advanced or lethal disease and can influence selection of therapeutics. An integral part of healthcare delivery design is the inclusion of patients/consumers in the development of frameworks for managing health interventions that are tailored to meet their needs. METHODS: In Phase I, we undertook focus group discussions with men previously diagnosed with PrCa (n=20), to determine their opinions, perceptions and expectations of germline genetic testing for PrCa. Focus groups were tape-recorded, transcribed verbatim, coded and then thematically analysed using NVivo. In Phase II, themes were then used to design and development a Precision Medicine in Prostate Cancer Information Toolkit, which was reviewed by patients (n=14), their carers/family members (n=4) and healthcare providers (n=14). RESULTS: In Phase I, knowledge about precision medicine and genetic testing was generally low. The strongest motivation for undertaking testing was to identify family members' risk levels (n=7), and the biggest concern pertained to insurance discrimination (n=5). Phase II data revealed that generally healthcare providers (n=8) found the purpose of the toolkit to be clearer than patients (n=5). Though, patients found the task of imagining the usefulness of the toolkit at the time of diagnosis or beforehand when assessing genetic risk, quite difficult. Participants highlighted that information regarding life insurance, implications for their family and costs associated with testing were of concern. CONCLUSIONS: This study has revealed critical knowledge gaps, preferred communication/support needs, and concerns/risks associated with germline genetic testing in PrCa. Concerns pertaining to family members and insurance discrimination are obvious topics that need to be addressed. Our toolkit may be helpful in addressing knowledge gaps, but further testing is needed to ensure its accessibility across literary and cultural contexts.

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Junctional Hounsfield unit ratio: understanding patient-specific vertebral bone strength for proximal junctional kyphosis risk assessment in adult spinal deformity surgery

Nagatani, Y.; Segi, N.; Ito, S.; Ouchida, J.; Yamauchi, I.; Ode, Y.; Okada, Y.; Takeichi, Y.; Tachi, H.; Kagami, Y.; Morishita, K.; Oishi, R.; Miyairi, Y.; Morita, Y.; Ohshima, K.; Oyama, H.; Ogura, K.; Shinjo, R.; Ohara, T.; Tsuji, T.; Kanemura, T.; Imagama, S.; Nakashima, H.

2026-04-06 orthopedics 10.64898/2026.04.05.26349586 medRxiv
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Study design A retrospective case control study Objective To predict proximal junctional kyphosis (PJK) risk by normalizing individual vertebral bone strength using the ratio of vertebral Hounsfield unit (HU) values around the upper instrumented vertebrae (UIV). Summary of background data PJK poses a significant challenge in treating patients after adult spinal deformity (ASD) surgery. While the vertebral body HU value is associated with PJK risk, the optimal threshold remains unclear, and a relative assessment of HU values within individuals has not been conducted. Methods Data on patients who underwent corrective fusion of the middle to lower thoracic region of the pelvis for ASD were assessed. The 126 patients were categorized into PJK and non-PJK groups. We compared the patients' backgrounds, vertebral body HU, and junctional HU ratio, defined as the HU value of UIV+1 divided by the HU value of UIV (HUUIV+1/HUUIV). The UIV+2/UIV+1 HU ratio was calculated similarly. Results The PJK and non-PJK groups included 30 and 96 patients, respectively. After propensity score matching, 28 patients from each group were analyzed. HU values at UIV+2 and UIV+1 (117.0 {+/-} 46.6 vs 145.1 {+/-} 45.9, p=0.018, and 105.5 {+/-} 36.2 vs 147.3 {+/-} 44.9, p<0.001, respectively) were lower in the PJK group. Junctional HU ratio was significantly lower in the PJK group (0.88 {+/-} 0.18 vs 1.13 {+/-} 0.25, p<0.001), and receiver operating characteristic analysis showed that the junctional HU ratio had the highest discriminative ability (area under the curve 0.812). At the optimal cutoff value (HU ratio of 0.905), the sensitivity and specificity for PJK were 64.3% and 89.3%, respectively. Conclusions A low junctional HU ratio was strongly associated with PJK after ASD surgery. This parameter reflects the bone strength mismatch at the proximal junction and may help improve preoperative risk assessment and UIV selection.

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The Pediatric Outcomes Data Collection Instrument (PODCI) as Performance Measure, Comparing General Population with Cerebral Palsy Population Using the Gross Motor Function Classification System Levels I-V

Weyermuller, C.; Andary, J.; Soliman, D.; Gates, P.

2026-04-02 orthopedics 10.64898/2026.04.01.26349726 medRxiv
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OBJECTIVES: Compare results of the Pediatric Outcomes Data Collection Instrument (PODCI) in children ages 2-18 years with cerebral palsy (CP) across all severity levels of the Gross Motor Function Classification System (GMFCS) with children in the General Population, confirming discriminant validity as a performance assessment tool and health-related quality of life (HRQOL) measure. METHODS: Cross-sectional study: single response PODCI proxy survey databases of 5238 children ages 2-18 years in GP and 2470 in the Population with CP were analyzed. Statistical methods included Analysis of Variance (ANOVA), Analysis of Covariance (ANCOVA), Linear Trend Test, and Standard Error Assessment. RESULTS: A statistically significant difference exists between PODCI subscales in General Population and Population with CP across age groups and GMFCS levels. Motor scales and Global Functioning increase with age in both populations and are inversely proportional to GMFCS level in the Population with CP. HRQOL measures decrease with age in both populations with Happiness decreasing more in the General Population than those with CP as age increases. CONCLUSIONS: PODCI demonstrates a statistically significant difference in motor performance and HRQOL in children ages 2-18, between the General Population and the population with CP. PODCI is a valid performance assessment tool for use in CP ages 2-18 across all GMFCS levels. KEYWORDS: Cerebral Palsy, General Population, PODCI, ICF, Performance

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Beyond Citations: Identifying Transformational Research in Hypospadias Through Bibliometrics and the Disruption Index

Abbas, T.; Naznine, M.; Mykha, M.; Mancha, M.; Hardas, A.; Raharja, P. A. R.; Chowdhury, M. E. H.

2026-04-20 urology 10.64898/2026.04.18.26351160 medRxiv
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Hypospadias, a common congenital anomaly requiring surgical correction, has seen growing research in surgical techniques and outcomes. However, no comprehensive bibliometric or disruption-based analysis exists to map the fields evolution. This study uses bibliometrics and the Disruption Index (DI) to identify key transformational research in hypospadias. A systematic search of five databases (PubMed, Web of Science, ScienceDirect, Scopus, and Dimensions) from January 1990 to December 2023 was conducted, yielding 7,732 articles. After applying inclusion criteria, 200 studies were analyzed. Citation data and DI scores were calculated using OpenCitations. Spearmans rank test assessed correlations between DI and citation metrics. A subgroup analysis identified trends based on the latest hypospadias research priorities. The mean citation count was 72.3 (SD = 43.1) with a mean DI of 0.011 (SD = 0.17). Five studies, focusing on complications, analgesia, and surgical techniques, had the highest DI (1.0). A moderate positive correlation was found between DI and citation rate ({rho} = 0.405, p < 0.001). Subgroup analysis showed most research focused on surgical techniques (30.5%) and etiology (25.8%), while areas like surgical training (2.6%) and innovation (0%) were underrepresented. This study identifies critical gaps in hypospadias research. The DI reveals influential studies that redirect research trajectories. Future work should focus on innovation and translational research to accelerate advancements in hypospadias care.

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Pixaire1: Evaluation of automated chronic wound surface measurement systems.

Maxant, G.; Mori, C.; Maxant, T.; Bertaux, A.-C.

2026-03-31 dermatology 10.64898/2026.03.30.26344793 medRxiv
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Purpose. To evaluate two smartphone-based methods for measuring the surface area of chronic wounds using : Woundtrack (semi-automated measurement: WT) and Woundsize (automated measurement: WS), and comparing them with the reference technique: digitized planimetry (PL). Population and methods. Pixaire 1 is an open-label, single-center study involving 42 patients, from May to June 2023. Wound surfaces were measured using the three methods by two independent experts. We realized a four steps statistical analysis: multivariate analysis of variance; correlation between the two experts (precision); agreement between the two evaluated methods and the reference (accuracy); analysis of non-conformities (differences of more than 20% in absolute values compared with the PL measurement) in a subset of wound less than 8 cm2. Results. Of the 42 patients, 6 were excluded from the statistical analysis (multiplanar wound: 4; difficult edge delineation: 2). We found no difference in multivariate analysis We showed excellent agreement (ICC > 0, 9) of repeated measures (precision) for all three protocols. We also demonstrated excellent agreement (ICC > 0, 9) between WT and WS measurements versus PL (accuracy). However, accuracy and precision were better for WT than for WS. Analysis of non-conformities in small areas wounds showed no difference in variance and distribution between WT and PL, and showed a significant difference between WS and PL. Conclusion. Woundtrack is close to Digitized Planimetry, in terms of precision (reproductibility of the measure) and accuracy (correlation of measures with digitized planimetry). Despite the existence of non-conformities in small wounds, WT does not significantly differ of PL in this subset. WT should be considered as an effective method to measure the area of the wound, similar to PL, with a real benefit in implementation in current care setting (easy to realize, less time consuming). Woundsize showed less consistent results, despite a reliability and an accuracy that remains good. Its integration in a "Algorithm: propose then Clinician: correct and validate" procedure seems most efficient way to implement such methods.

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Exploring Undergraduates' Knowledge, Attitude, and Perception of Infertility in Osun State University: A mixed method study

Adeyemo, S. C.; Awodele, K.; Waliu, A. T.; Fasanu, A. O.; Akinbowale, B. T.; Adeniyi, V. A.; Folami, R.; Akinwale, O. D.; Falade, J.; Olabode, E. D.

2026-04-01 obstetrics and gynecology 10.64898/2026.03.30.26349746 medRxiv
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Background Conventionally, infertility has been regarded as primarily a female issue, leading to misconceptions, stigma, and underrepresentation of male infertility in healthcare discussions. This study assessed the knowledge, attitude and perception of Undergraduates towards male infertility in Osun State University. Methods A descriptive cross-sectional design was employed to select 300 undergraduates via multistage sampling. Qualitative data were collected using a focus group discussion guide covering the knowledge, attitude and perception, while quantitative data were collected using a self-administered questionnaire covering socio-demographic characteristics, knowledge, attitude and perception towards male infertility. Qualitative analysis was performed using NVivo software, while IBM SPSS Statistics version 27 was used for the quantitative analysis, with thematic analysis and chi-square tests to determine the association between variables (significance at p < 0.05). Results Respondents were predominantly females (64.0%) with a mean age of 20.99 {+/-} 2.31 years. Overall knowledge was low (47.7%), while more than half had a negative attitude (52.3%). Significant predictors of attitude include faculty (0.049), level (p=0.031), and formal education on male infertility (p=0.007). Conclusion Students demonstrated a poor understanding of male infertility, and their attitudes remain influenced by cultural norms surrounding marriage, masculinity, and gender roles. Hence, the need to foster open dialogues, promote gender-inclusive narratives, and strengthen healthcare support systems.

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Operative Hysteroscopy in the Management of Endometrial Polyps: Clinical Indications and Surgical Outcomes

Bornaun, T.

2026-04-02 public and global health 10.64898/2026.03.31.26349904 medRxiv
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Background/Objectives: This study aimed to evaluate the efficacy and outcomes of operative hysteroscopy for the removal of endometrial polyps and assess the procedure's impact on pain experienced by patients. The research was conducted to determine whether the minimally invasive nature of operative hysteroscopy compromises patient comfort when compared with diagnostic hysteroscopy. Methods: The study was conducted at the Gynecology and Obstetrics Clinic of Ba[g]clar Training and Research Hospital over a period of four months. It included 200 women over 18 years of age who were indicated for hysteroscopy. Operative hysteroscopy procedures were performed without the use of a speculum, cervical dilation, anesthesia, or analgesic agents, emphasizing the procedure's minimally invasive approach. Pain assessment utilized the Visual Analog Scale (VAS). Patients were stratified into two groups--those undergoing operative and those undergoing diagnostic hysteroscopy--to compare outcomes and pain scores. Results: The study found that operative hysteroscopy successfully removed 85.1% of the lesions, primarily polyps. There was no significant difference in pain scores between the operative and diagnostic hysteroscopy groups, indicating that the minimally invasive procedure does not increase patient discomfort. Conclusions: Operative hysteroscopy is an effective and tolerable procedure for the removal of endometrial polyps, with high success in complete lesion removal and without significantly impacting the pain experienced by patients. The findings support the use of operative hysteroscopy as a first-line treatment option for endometrial polyps, underscoring the importance of patient selection and the need for further studies on long-term outcomes related to fertility and recurrence.

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Pilot Feasibility Clinical Trial of Virtual Reality for Pain Management During Repeated Pediatric Laser Procedures: Study Protocol for a Randomized Clinical Trial

Armstrong, M.; Williams, H.; Fernandez Faith, E.; Ni, A.; Xiang, H.

2026-04-22 dermatology 10.64898/2026.04.21.26351381 medRxiv
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BackgroundLasers have wide applications in medicine and dermatology, but are associated with pain and anxiety, particularly in younger patients. Pain mitigation is often limited to topical anesthetics in the outpatient setting. Distraction techniques are limited by the need for ocular protection, which can include adhesive eye patches that can completely occlude vision. Virtual reality is effective at managing procedural pain and anxiety under other short medical procedures and is a promising tool for this population. ObjectiveThis trial aims to assess the safety, feasibility, and efficacy of Virtual Reality Pain Alleviation Therapeutic (VR-PAT) for pain management during outpatient laser procedures. Methods40 patients requiring outpatient laser therapy for at least two sessions will be recruited from a pediatric hospital in the midwestern United States for this crossover randomized, two-arm clinical trial with a 1:1 allocation ratio. During the first laser visit, the participant will be randomly assigned to either play the VR-PAT game during their procedure or wear the headset with a dark screen. Participants will answer questions about their pain (Numeric Rating Scale (NRS) 0-10), anxiety (State Trait Anxiety Inventory for Children, NRS 0-10, Modified Yale Preoperative Anxiety Scale (mYPAS)), and pain medication usage. Those playing the VR-PAT will additionally report simulator sickness symptoms and their experience playing the game. At their second laser visit, participants will crossover to the opposite intervention from their first visit. The primary outcomes are the difference in self-reported pain and anxiety between the two interventions. Feasibility outcomes include the proportion of screened patients who are eligible, consent, and complete both visits and adverse events reported. To evaluate the efficacy of pain reduction, composite scores of pain score, pain medication will be calculated for each laser visit. To evaluate the efficacy of anxiety reduction, the change of mYPAS scores will be compared between control and VR groups at each visit using Wilcoxon rank sum tests. All statistical analyses will follow the intention-to-treat principle in regard to intervention assignment at each visit. ResultsThe study was funded in January 2023 and began enrollment at that time. A total of n=44 participants were recruited and data collection was completed in November 2025, with n=40 subjects completing both visits. The sample was balanced with n=40 subjects using the intervention and participating in the control condition. The age range of the complete sample was 6 to 21 years at recruitment and was 55% female sex. Data analysis is in progress with final results planned for June 2026. ConclusionsFindings from this innovative randomized clinical trial will provide early evidence on the efficacy of the VR-PAT for reducing self-reported pain and anxiety during outpatient laser procedures. The results from this trial will inform a large-scale, multisite study. Trial RegistrationClinicalTrials.gov: NCT05645224 [https://clinicaltrials.gov/study/NCT05645224]

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Prevalence and factors associated with reporting of sexual violence among secondary school adolescents in Ibadan Metropolis, Nigeria: A cross-sectional study

Olaniyan, H. O.; Olumide, A. O.

2026-04-11 public and global health 10.64898/2026.04.08.26344946 medRxiv
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BackgroundSexual violence (SV) is a major public health problem with far-reaching consequences; however, adolescent survivors rarely seek help. This underestimates the prevalence of SV and undermines prevention and response efforts. This study was conducted to determine the prevalence and reporting of sexual violence among adolescents in Ibadan, Nigeria. MethodsBetween September and October 2021, a cross-sectional study was conducted among 360 in-school adolescents in Ibadan South-West local government area, Nigeria. Adolescents were selected using multi-stage sampling. Information on experience and reporting of sexual violence was obtained with the aid of an interviewer-administered questionnaire. Data were analysed using descriptive and inferential statistics at p[&le;]0.05 level. ResultsRespondents mean age was 14.6{+/-}1.7 years, and 50% were female. Thirty-five per cent reported at least one incident within the past 12 months. Forms of sexual violence experienced included unwanted sexual touch (25.6%), forced sex (19.2%), attempted rape (15.2%), and suggestive comments (9.6%). Seventy per cent of adolescents who experienced sexual violence did not report to anyone; reasons included fear of getting in trouble (46.6%), thinking it was not a problem (31.8%), feeling it was their fault (30.7%), and embarrassment for self/family (27.3%). Adolescents who were closer to their mothers and younger adolescents were more likely to report their experience of sexual violence (p=0.006 and p=0.038, respectively). ConclusionSexual violence is common among in-school adolescents in Ibadan, yet reporting remains low. This study highlights the need to strengthen prevention and address barriers to reporting among adolescent survivors. Key MessageO_ST_ABSWhat is already known on this topicC_ST_ABSSexual violence has physical, psychological, and social consequences on the health and well-being of adolescent survivors, and low levels of reporting and help-seeking contribute to these consequences. What this study addsThis study provides evidence on the prevalence and reporting patterns of sexual violence among adolescents in Ibadan, Nigeria. It highlights key barriers and facilitators of reporting. How this study might affect research, practice, or policyThis study provides information about factors at individual, relationship, societal and policy levels that are associated with reporting and help-seeking among adolescent survivors of sexual violence in Ibadan, Nigeria. This highlights the importance of training stakeholders, such as parents, teachers, health workers, other caregivers and the adolescents themselves, on responding to sexual violence experience and reporting. It underscores the need for improved adolescent-friendly services, policy implementation and collaboration across families, schools, communities and states to address sexual violence.

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Performance of Cardiac MRI for the Diagnosis of Cardiac Amyloidosis in Patients with Advanced Renal Disease

Gunta, S. P.; Mohananey, D.; Garster, N.; Bennett, C.; Kalidindi, S.; Geiger, J.; Ocran, S.; Narra, R.; Bergmann, L. L.; Lewandowski, D.

2026-04-07 cardiovascular medicine 10.64898/2026.04.06.26350276 medRxiv
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Background Cardiac MRI (CMR) is often utilized for patients with suspected cardiac amyloidosis (CA). However, data are lacking for use in patients with advanced renal dysfunction (ARD) (GFR<30 mL/min/1.73 m2, dialysis dependent, or renal transplant). This study evaluates the utility of CMR for diagnosis of CA in this population. Methods Patients with ARD who underwent CMR in a 3T field for suspicion of CA between 2010 and 2024 at our institution were included. A diagnosis of CA was made if any of the following were present a)?PYP scintigraphy grade ? 2, b) positive endomyocardial biopsy, or c) positive extracardiac biopsy with clinical features of CA. Two CMR-trained physicians independently assessed T1 relaxation time, ECV, Ti scout, LGE, and overall likelihood of CA. Results Out of the 65 patients included 14 (22%) had a diagnosis of CA. Although T1 time [1352 (1276-1428) ms] and ECV (40.3% +/- 9.1%) were elevated across the cohort, they were significantly higher in patients with CA (p<0.001 for both). Both ECV and T1 time reliably predicted CA (AUC of 0.87 and 0.88 respectively). ECV of ?45% had 75% sensitivity and 80% specificity for CA. A T1 time ? 1390 ms had 75% sensitivity and 85% specificity for CA. LGE was prevalent and was seen in 86% and 84% patients with and without CA respectively. Of the 31 patients deemed to be unlikely CA by a CMR reader, 6% had CA. However, of the 34 patients read as possible/likely CA, only 35% had confirmed CA. Conclusions In this understudied population of ARD, CMR parametric mapping exhibits high negative predictive value (NPV) for CA and improved positive predictive value (PPV) when higher cutoffs are used for T1 time and ECV. CMR reader overall impression exhibits high NPV but low PPV for CA.

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Epidemiology and Associated Risk Factors of Diabetic Retinopathy in Patients with Diabetes Mellitus Attending a Tertiary-care Hospital in Hargeisa, Somaliland

Woredekal, A. T.

2026-03-31 ophthalmology 10.64898/2026.03.29.26349614 medRxiv
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Purpose Diabetic retinopathy (DR) is one of the most important complications of diabetes mellitus (DM), representing the leading cause of blindness among working age adults in developed countries. This study was aimed to investigate the epidemiology and risk factors of DR in patients with diabetes mellitus in a hospital setting in Somalia. Methods The study was an observational, descriptive cross-sectional and hospital-based study and data were collected from January 2023 to May 2023. A structured questionnaire was used to collect relevant demographic and clinical data. Both univariate and bivariate tables were used for analysis. Data analysis included frequency distribution, cross-tabulation, co-relation and association, and statistically significant tests between variables (X2, p-value, and CI). Results A total of 384 DM patients were studied and 76% (n=293) of them had type 2 DM. The average duration of diabetes mellitus was 9.7 SD 6.9 years and the mean age was 47.24 SD 19.36 years (range 18 -100 years old). A majority 66% (n=253) were female, about a third of them had normal body mass index (BMI) (n=172, 44.8%) and 170 (44.3%) had concomitant hypertension. About 51% of the patients (n=197) had DR out of which 17% had non-proliferative diabetic retinopathy (NPDR) (n=67) and 26% had Macular oedema (n=98). Age above 40 years (p=0.020), marital status (P=0.010), employment status (P=0.002) and literacy status (P=0.020) were significantly associated with the presence of DR. Patients aged below 40 had 37% lesser risk of having diabetic retinopathy than patients aged above 40 years. Longer duration of diabetes (p=0.001) and the presence of concomitant cardiac illness (p=0.001) were strongly associated with the presence of diabetic retinopathy. Patients with duration of diabetes more than 10 years had approximately 2 times higher chance of developing DR than those with duration less than 10 years. Conclusion: The very high prevalence of DR (51%) among our patients implies the needs for a good health policy to manage DM and DR patients in Somalia. Effective regular eye screening and treatment for all diabetes patients should get priority.

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Bridging the Awareness Utilisation Gap in Reusable Menstrual Product Use Among Female Medical Students and Healthcare Professionals: A Cross-Sectional Study

Wami-Amadi, C. F.; Nonju, I. I.

2026-04-12 sexual and reproductive health 10.64898/2026.04.10.26350626 medRxiv
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Background: Reusable menstrual products provide sustainable and cost effective alternatives to disposable sanitary products; however, their adoption remains limited, even among healthcare professionals. Objectives: To assess awareness, knowledge, perceptions, and utilisation of reusable menstrual products among female medical students and healthcare professionals, and to identify predictors of willingness and use. Design: Cross sectional analytical study. Setting: An online survey was conducted among female medical students and healthcare professionals in Nigeria. Participants: A total of 203 female respondents aged 15 to 55 years. Intervention: Not applicable. Primary Outcome Measures: Utilisation of reusable menstrual products and willingness to adopt their use. Secondary Outcome Measures: Awareness, knowledge, perceptions, and barriers. Methods: Data were collected using a structured questionnaire and analysed using descriptive statistics, chi square tests, and logistic regression. Results: Awareness was high (96.06%), but utilisation was low, with 5.42% ever using and 4.43% currently using reusable products. About 31.53% were willing to use them. Respondent type was not associated with willingness (p = 0.735), although healthcare professionals had higher knowledge (p = 0.024). Positive perception predicted willingness (AOR = 7.58, 95% CI: 3.18 to 18.03, p < 0.001). Good knowledge (AOR = 14.96, p = 0.014) and increasing age (AOR = 1.28, p = 0.004) predicted utilisation. Conclusion: Despite high awareness, utilisation remains low. Perception influences willingness, while knowledge drives use. Targeted behavioural and educational interventions are needed. Keywords: Menstrual hygiene, reusable menstrual products, menstrual cup, sustainability, healthcare professionals

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Synthetic Cathinones: Bath Salts or Flakka Poisonings and Use in the United States 2021 to 2023

Ware, O. D.

2026-03-30 public and global health 10.64898/2026.03.27.26349556 medRxiv
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Synthetic cathinones, colloquially called bath salts or flakka, are a group of psychoactive substances used recreationally, including mephedrone and eutylone. Studies examining the prevalence of bath salt use among select samples in the United States have found that approximately 1% of nightclub attendees in New York, high school seniors, and college students have used them. The purpose of this study was to examine the national prevalence of lifetime and past-12-month use of bath salts among a nationally representative sample of persons in the United States from 2021 to 2023. This study also examined nationwide poison center data to identify the number of poisonings from 2021 to 2023 in which bath salt use was intentional and not necessarily an adulterant in another illicitly obtained recreational substance. This study identified the prevalence of lifetime bath salt use among a nationally representative sample of persons 12 years and older in the U.S. to be 0.2% (n = 670,611) in 2021, 0.3% (n = 838,941) in 2022, and 0.3% (n = 836,128) in 2023. The national prevalence of past-12-month bath salt use was 0.0% (n = 111,039) in 2021, 0.1% (n = 167,815) in 2022, and 0.1% (n = 152,276) in 2023. From 2021 to 2023, there were 148 cases in which bath salt use was intentional and involved in a reported poisoning to one of the 55 poison centers in the U.S. Future studies are needed to examine risk factors associated with bath salt-related poisonings.

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Data Matters: The Impact of Data Curation in the Classification of Histopathological Datasets

Brito-Pacheco, D. A.; Giannopoulos, P.; Reyes-Aldasoro, C. C.

2026-04-17 pathology 10.64898/2026.04.16.26351016 medRxiv
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In this work, the impact of outliers on the performance of machine learning and deep learning models is investigated, specifically for the case of histopathological images of colorectal cancer stained with Haematoxylin and Eosin. The evaluation of the impact is done through the systematic comparison of one machine learning model (Random Forests) and one deep learning model (ResNet-18). Both models were trained with the popular NCT-CRC-HE-VAL-100K dataset and tested on the CRC-HE-VAL-7K companion set. Then, a curation process was performed by analysing the divergence of patches based on chromatic, textural and topological features of the training set and removing outliers to repeat the training with a cleaned dataset. The results showed that machine learning models, can benefit more from improvements in the quality of data, than deep learning models. Further, the results suggest that deep learning models are more robust to outliers as, through the training process, the architectures can learn features other than those previously mentioned.

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Low-Cost 3D-Printed Molds for PMMA Cranioplasty: Case Series and Workflow Analysis

Gondra, T.; Gimbatti, R. A.; Santangelo, P.

2026-04-07 neurology 10.64898/2026.04.02.26349771 medRxiv
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BACKGROUND: Cranioplasty is an essential procedure to restore cranial integrity, protect neural structures, and improve cosmetic outcomes. However, commercially available implants are often costly, limiting their accessibility in public healthcare systems. Three dimensional (3D) printing offers a low cost alternative for producing patient-specific solutions. METHODS: A retrospective case series of eight patients undergoing cranioplasty using customized polymethylmethacrylate (PMMA) implants fabricated with 3D printed molds was conducted. Computed tomography (CT) scans were used for segmentation and digital modeling. Patient specific molds were designed and printed preoperatively. Variables analyzed included design time, printing time, intraoperative workflow, and clinical outcomes. RESULTS: Design time ranged from approximately 1 hour for small defects to 3 hours for larger defects. Printing time ranged from 2 3 hours for smaller defects and up to 8 10 hours for larger reconstructions. Satisfactory aesthetic outcomes were achieved in 7 of 8 patients (87.5%). No major implant related complications were observed. CONCLUSION: Low cost 3D printing for PMMA cranioplasty is a feasible, accessible, and effective technique for cranial reconstruction, particularly in resource limited settings. Keywords: Cranioplasty; 3D printing; Cranial defect reconstruction; Low cost surgery; Patient specific implants; Polymethylmethacrylate; Skull reconstruction

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Chronic skin ulcers, Burkina Faso: review of consultation trends and patient types treated between 2013 and 2023 in the dermatology departments of Souro Sanou and Yalgado Ouedraogo University Hospitals

Christiana, K. A.; Anselme, M.; Juliette, T.-D.; Aristote Wendpanga, D. N.; Boukary, D.; Issouf, K.; Samuel, K. D.; Lydie, T. Y.; Madi, K.; Abdoulaye, O.; Madi, S.; Sanata, B.; Jacques, Z.; Therese, K.; Abdoul-Salam, O.; Baptiste, A. J.; Macaire, O.; Pascal, N.

2026-04-11 dermatology 10.64898/2026.04.07.26350370 medRxiv
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Social stigma surrounding chronic skin Ulcer leads patients to hide their wounds or delay seeking medical care. The aim of this study was to explore the types and causes of chronic skin ulcers among patients seen in the dermatology departments of two university hospitals in Burkina Faso. This was a cross-sectional, retrospective study covering an 11-year period, from 2013 to 2023. A review of consultation records allowed for the collection of sociodemographic and clinical data from 104 patients who were seen for chronic skin ulcers over the 11-year period, averaging 9 patients per year. The patients were primarily adults (n=60) and older adults (n=21). Leg ulcers were the condition observed in most patients (n=59). Eight cases of Buruli ulcer (7.69%) were identified among the 104 patients. Five of the eight cases, or 62.50%, were aged between 0 and 19 years. Half of the eight patients resided in Ouagadougou. These results highlight low utilization of dermatology services for chronic skin ulcers. Furthermore, indigenous cases of Buruli ulcer have been identified in Burkina Faso. Consequently, our findings call for the implementation of strategies focused on addressing social perceptions of these ulcers and on the screening and management of this disease.

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A multimodal exploration of circulating inflammatory markers in patients undergoing surgical intervention for lumbar disc herniation in selected hospitals of Sri Lanka

Aravinth, P.; Withanage, N. D.; Senadheera, B. M.; Pathirage, S.; Athiththan, S. P.; Perera, S. L.; Athiththan, L. V.

2026-04-23 orthopedics 10.64898/2026.04.21.26351426 medRxiv
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Background Inflammatory markers play an important role in the pathophysiology of Lumbar disc herniation (LDH). This study presents a comprehensive multi-assessment of the inflammatory landscape by combining serum inflammatory cytokines quantification, their diagnostic performance, associations with radiological features, and integrating the experimental findings into an in-silico protein-protein interaction network. Methods A multifaceted study design was utilized to quantify and compare the distribution of selected inflammatory cytokines in patients with LDH and control subjects. The diagnostic ability of these cytokines was assessed using receiver operating characteristic curve analysis. The cytokines values were correlated with selected radiological findings including disc herniation subtypes (protrusion, extrusion, and sequestration), and further categorized as contained and non-contained in patients using a Spearmans rank correlation test. Additionally, computational analysis was performed to identify the central hubs and functionally enriched pathways. Results In patients with LDH, IL-6 and IL-1{beta} showed statistically significant (IL-6: p < 0.001; IL-1{beta}: p = 0.001) rise, but IL-6 showed high diagnostic and discriminative power (AUC = 0.99; cut-off: 19.99 pg/mL). Further IL-1{beta} exhibited a positive correlation with non-contained disc herniation (extrusion and sequestration), while displaying a significant (p < 0.05) negative correlation with protrusion. In silico analysis identified IL-1{beta}, IL-8, TNF-, IL-6, IL-1, CSF2, CSF3, and IL-10 as central hubs, with IL-1{beta} being the top ranked hub in determining functionally enriched cytokine-cytokine receptor interaction. Conclusions Study confirmed IL-6 as a powerful diagnostic marker for LDH, while IL-1{beta} aids in determining contained and non-contained disc herniation. Further, IL-1{beta} was identified as the central hub, triggering functionally enriched pathways in the pathogenesis of LDH.