Polysubstance use (PSU), particularly opioid-involved and stimulant-involved PSU, is a growing issue in the USA. PSU increases the risk of negative health consequences, including infectious diseases, worsening physical and mental health conditions, and overdose-related deaths. These consequences occur in the context of varying health risk behaviours, substance-related preferences, and treatment engagements among people with PSU. To inform improvements in prevention, harm reduction, and substance use disorder (SUD) treatment, additional research is needed to comprehensively understand the current context and drivers of PSU preferences, motivations, and behaviours.

Herein, we describe the protocol for a prospective cohort study designed to capture detailed patterns, profiles, and trajectories of PSU, with the aim of comprehensively examining the drivers of PSU behaviours and SUD treatment utilisation. Adults (ages 18–75; n=400) who engage in PSU will be recruited from healthcare institutions, an established participant database maintained by an adjacent SUD research team, and online advertisements. Study assessments will capture dynamic patterns, choice preferences, and motivators of PSU via behavioural economic (BE) measures, detailed Timeline Follow-Back (TLFB) interviews, and self-administered surveys. The assessment timeline will include a baseline survey and TLFB interview, weekly TLFB interviews for 4 weeks post-baseline, and follow-up surveys and TLFB interviews at 4-, 8-, and 12-months post-baseline.

The study is funded through the National Institutes of Health Helping to End Addiction Long-term (HEAL) initiative and was approved by the University of Michigan Medical Institutional Review Board. Findings will be disseminated to academic, clinical, and community partners through the Michigan Innovations in Addiction Care through Research and Education programme. Results from this study will inform actionable and practical insights relevant to the delivery of personalised care in the context of PSU.

Antibiotic self-medication and home storage are two common behaviours that can result in inappropriate drug use. This study elucidated their prevalence and associated factors among university students in Vietnam.

Cross-sectional study.

Vietnam.

2230 university students.

Antibiotic storage was evaluated at the time of the survey, while self-medication was assessed for 1 year preceding this time. Associated factors were determined via multivariable logistic regression models.

Among 2230 participants, 418 (18.7%) reported self-medicating with antibiotics. The three main reasons for this behaviour included saving time (48.6%), mild diseases (45.0%) and the ease of purchasing antibiotics from community pharmacies (43.8%). Community pharmacies (88.3%) and home storage (36.4%) were the primary sources of antibiotics for self-treatment. Students mainly selected antibiotics based on community pharmacists’ consultation (59.8%) and their knowledge/experience (37.8%). They commonly read the patient information leaflet (64.6%) and asked for the community pharmacist’s advice to obtain information about antibiotic usage (52.9%). Besides, 296 students (13.3%) stored antibiotics at home. Over two-thirds had antibiotic leftovers from previous treatment and stored them for future use (69.3%), while 46.3% purchased antibiotics from community pharmacies without a prescription. Amoxicillin/clavulanic acid was the most commonly used antibiotic for self-medication (59.8%) and home storage (54.4%). Antibiotic self-medication was significantly associated with older age (adjusted odds ratio (aOR)=1.25; 95% CI 1.15 to 1.35), non-healthcare students (aOR=0.47; 95% CI 0.34 to 0.63), higher knowledge score (aOR=1.05; 95% CI 1.02 to 1.07) and storing antibiotics at home (aOR=7.12; 95% CI 5.34 to 9.51). Factors associated with home storage of antibiotics included non-healthcare students (aOR=2.77; 95% CI 2.01 to 3.83), region (north: aOR=6.50; 95% CI 3.49 to 13.54; south: aOR=5.92; 95% CI 3.06 to 12.65), having a family member working in the medical field (aOR=1.70; 95% CI 1.29 to 2.25), higher knowledge score (aOR=1.05; 95% CI 1.02 to 1.08) and antibiotic self-medication (aOR=7.58; 95% CI 5.69 to 10.14) (p values

The prevalence of antibiotic self-medication and home storage among students was relatively low but still raises public health concerns. Some interventions, such as integrating targeted health education programmes into university curricula, orientation sessions, extracurricular activities and campus campaigns, may help effectively promote rational antibiotic use.

Despite increasing proportions of underrepresented minority (URM) medical school graduates, their progression into surgical training and leadership remains disproportionately low. Barriers such as financial constraints, limited mentorship and implicit bias contribute to this disparity, creating a disconnect between the diversity of patient populations and those providing care. While interventions such as mentorship programmes and pipeline initiatives have been implemented, their overall effectiveness has not been systematically evaluated. The primary aim of this scoping review is to map the current landscape of interventions, programmes and policies designed to enhance access to surgical careers for URM learners.

Searches will be conducted on EMBASE, Web of Science and OVID MEDLINE. Three independent reviewers will screen references, extract data and perform analyses with disagreements adjudicated by a fourth reviewer. This review will include studies conducted across all levels of training: secondary (high school or secondary school), postsecondary (undergraduate, medical school) and postgraduate (residency, fellowship), with no geographical restrictions. The definition of URM will be accepted as reported within each individual study, allowing for variability in racial, ethnic, gender, socioeconomic or other criteria. The review will include any structured interventions, programmes or policies aimed at increasing URM representation in surgical education. Data on the nature, duration and target population of each intervention will be extracted. The primary outcome will be the reported impact of interventions on URM representation or participation in surgical education. Secondary outcomes will include characteristics of the study participants, definitions of URM status and any qualitative or quantitative evaluations of intervention effectiveness.

Research ethics approval is not required under University of Toronto policy. Study results will be reported according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines. Results will be disseminated to relevant stakeholders at conference presentation(s) and submitted for publication in a peer-reviewed journal.

This study aims to determine the incidence and impact of ocular injuries among the different combat sports disciplines of boxing, mixed martial arts (MMA), kickboxing and Muay Thai in Texas, USA.

A case–control study was conducted to analyse retrospective postmatch physical reports from combat sports matches that took place in the state of Texas from January 2019 to January 2022. Ocular injuries and other match characteristics such as sport type and match outcome were identified by postmatch physical reports. Postmatch physical reports were collected from the Texas Department of Licensing and Regulation database. Statistical analysis was used to stratify injuries and compare the impact of injuries on match outcome.

Combat sports fighters in Texas, USA.

3070 participants were included in the study. Participants were fighters who participated in combat sports matches in Texas, USA, between January 2019 and January 2022.

The original plan was to measure the incidence of ocular injuries across different combat sports including boxing, MMA, kickboxing and Muay Thai. However, due to a limited sample size of kickboxing and Muay Thai matches, the ocular injury incidence was only measured for boxing and MMA. The association between ocular injury and match outcome was assessed using ² statistical analysis.

The respective incidence rates of ocular injuries in boxing and MMA were 9.7 and 12.2 injuries per 100 matches. The association between ocular injury and match outcome (win, lose or draw) was statistically significant in boxing but not statistically significant in MMA matches.

Our findings revealed that ocular injuries are significantly associated to losing a boxing match (p=0.011), but not associated to match outcome in MMA (p=0.232). Additionally, MMA matches report a larger variety of ocular injuries compared with boxing matches.

Current guideline-recommended antibiotic treatment durations for ventilator-associated pneumonia (VAP) are largely standardised, with limited consideration of individual patient characteristics, pathogens or clinical context. This one-size-fits-all approach risks both overtreatment—promoting antimicrobial resistance and adverse drug events—as well as undertreatment, increasing the likelihood of pneumonia recurrence and sepsis-related complications. There is a critical need for VAP-specific biomarkers to enable individualised treatment strategies. The Ventilator-associated pneumonia Biomarker Evaluation (VIBE) study aims to identify a dynamic alveolar biomarker signature associated with treatment response, with the goal of informing personalised antibiotic duration in future clinical trials.

VIBE is a prospective, observational, case-cohort study of 125 adult patients with VAP in Michigan Medicine University Hospital intensive care units. Study subjects will undergo non-bronchoscopic bronchoalveolar lavage on the day of VAP diagnosis (Day 1) and then on Days 3 and 5. Alveolar biomarkers (quantitative respiratory culture bioburden, alveolar neutrophil percentage and pathogen genomic load assessed via BioFire FilmArray polymerase chain reaction) will be assessed. An expert panel of intensivists, blinded to biomarker data, will adjudicate each patient’s Day 10 outcome as VAP clinical cure (control) or treatment failure (case). Absolute biomarker levels and mean-fold changes in biomarker levels will be compared between groups. Data will be used to derive a composite temporal alveolar biomarker signature predictive of VAP treatment failure.

Ethical approval was obtained from the University of Michigan Institutional Review Board (IRB #HUM00251780). Informed consent will be obtained from all study participants or their legally authorised representatives. Findings will be disseminated through peer-reviewed publications, conferences and feedback into clinical guidelines committees.

Structured Early detection of Asymptomatic Liver fibrosis and cirrhosis (SEAL) is a population-based screening programme using non-invasive tests for the early detection of liver fibrosis. This study evaluates the cost implications if the SEAL programme were to be implemented in routine care in Germany.

This study models cost differences with and without the SEAL screening programme. We regress costs of care on patient characteristics (age, comorbidities, sex, liver diseases, liver cancer and liver fibrosis and cirrhosis (LCI) stage) using statutory health insurance (SHI) data from routine care patients with LCI (n=4177). Based on these results, we predict per-patient costs for the patients newly diagnosed with LCI by SEAL (n=45). Costs with and without screening are estimated using patient age and LCI stage distributions from either SEAL or routine care.

SEAL was conducted in two German states. Initial screening was performed by patients’ primary care physicians.

Individuals insured by SHI without a prior diagnosis of LCI, eligible for Check-up 35, a general health check-up programme primarily targeting adults aged 35 and older, conducted by primary care physicians.

Screening via aspartate aminotransferase to platelet ratio index in primary care, for further evaluation serological diagnostics and ultrasound examinations in secondary care and specific assessment for definite diagnosis including transient elastography and liver biopsy for selected cases in tertiary care.

Primary outcome measures: expected 5-year cost changes for SEAL patients diagnosed with fibrosis or cirrhosis compared to costs without a screening programme. Secondary outcome measures: case mix of leading chronic liver disease and LCI stages among patients diagnosed with advanced fibrosis or cirrhosis in SEAL versus routine care without screening.

Screening leads to fewer decompensated cases at initial diagnosis (4.6% in SEAL vs 22.8% in routine care) and thus savings in the costs of care within the first years of diagnosis: total expected costs per case were 2175 lower (bias-corrected bootstrap CIs (BCI): 527 to 3734), and LCI-associated costs were reduced by 1218 (BCI: 296 to 2164). Comparing the savings to the additional costs of diagnosis (range: 1575–1726 per detected LCI case) reveals that average changes in costs with screening range from moderate savings to moderate extra costs.

SEAL liver screening identifies patients in less advanced stages of LCI. If only costs were considered that are directly attributable to LCI, savings within 5 years are unlikely to fully outweigh the costs of screening. However, since this approach might miss additional LCI-related costs, SEAL appears to be cost-neutral compared with routine care when considering total healthcare costs.

The SEAL registration number is DRKS00013460. This study relates to its results.

In 2022, the WHO conditionally recommended the use of treatment decision algorithms (TDAs) for treatment decision-making in children

Within the Decide-TB project (PACT ID: PACTR202407866544155, 23 July 2024), we aim to generate an individual-participant dataset (IPD) from prospective TB diagnostic accuracy cohorts (RaPaed-TB, UMOYA and two cohorts from TB-Speed). Using the IPD, we aim to: (1) assess the diagnostic accuracy of published TDAs using a set of consensus case definitions produced by the National Institute of Health as reference standard (confirmed and unconfirmed vs unlikely TB); (2) evaluate the added value of novel tools (including biomarkers and artificial intelligence-interpreted radiology) in the existing TDAs; (3) generate an artificial population, modelling the target population of children eligible for WHO-endorsed TDAs presenting at primary and secondary healthcare levels and assess the diagnostic accuracy of published TDAs and (4) identify clinical predictors of radiological disease severity in children from the study population of children with presumptive TB.

This study will externally validate the first data-driven WHO TDAs in a large, well-characterised and diverse paediatric IPD derived from four large paediatric cohorts of children investigated for TB. The study has received ethical clearance for sharing secondary deidentified data from the ethics committees of the parent studies (RaPaed-TB, UMOYA and TB Speed) and as the aims of this study were part of the parent studies’ protocols, a separate approval was not necessary. Study findings will be published in peer-reviewed journals and disseminated at local, regional and international scientific meetings and conferences. This database will serve as a catalyst for the assessment of the inclusion of novel tools and the generation of an artificial population to simulate the impact of novel diagnostic pathways for TB in children at lower levels of healthcare. TDAs have the potential to close the diagnostic gap in childhood TB. Further finetuning of the currently available algorithms will facilitate this and improve access to care.

Observational studies play a pivotal role in understanding population health trends and informing public health policy. However, many such studies inadequately address dimensions of health inequality, potentially perpetuating existing disparities. There is currently no comprehensive overview of frameworks specifically designed to integrate health-inequality constructs into observational public health research. This protocol outlines the methodology of the scoping review, which aims to identify, describe and critically evaluate existing frameworks that explicitly incorporate health inequalities within observational studies.

We will conduct this scoping review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines. Six electronic databases (PubMed, Embase, Scopus, Web of Science, Global Health and CINAHL) and eligible grey literature sources will be searched using a combination of keywords and subject headings related to health inequalities, observational study design and frameworks. Two independent reviewers will perform title/abstract screening and full-text eligibility assessment using Rayyan, while discrepancies will be resolved by consultation with a third reviewer. Findings will be synthesised narratively.

As this study involves analysis of publicly available literature, formal ethical approval is not required. Results will be disseminated through publication in a peer-reviewed journal, presentations at relevant conferences and communication with key stakeholders in public health and equity research. The results will also be shared directly with charities and local organisations which focus on addressing health inequalities. By providing a comprehensive map of existing frameworks, this review will inform researchers on best practices for embedding health-inequality considerations in observational studies and support the development of more equitable research methodologies.

This study aimed to investigate the characteristics and management of influenza-like illnesses (ILIs) in the outpatient and inpatient settings in Vietnam.

A cross-sectional, observational study.

We conducted a questionnaire survey of 407 individuals with ILI symptoms who presented to public community health centres and the paediatric ward of a public hospital in the city of Nha Trang, Khanh Hoa Province, Vietnam, from December 2022 to March 2023.

Not applicable.

No primary and secondary outcomes were pre-specified because this study was an explanatory study. The basic characteristics of the participants are presented using descriptive statistics. We conducted multivariable logistic regression analysis to examine the factors associated with the prescription of antibiotics to outpatients with ILIs.

A total of 198 outpatients and 200 inpatients were enrolled in the study. Most inpatients were children under 5 years of age and experienced longer illness durations and higher costs, with almost all patients receiving antibiotics. The rate of antimicrobial prescription for ILIs was 79.3% for outpatients and 99.5% for inpatients. The median health-related quality of life score of participants aged ≥18 years during illness was 0.796 (IQR 0.674–0.922). Logistic regression analysis indicated a negative association between a definite diagnosis of viral infection by rapid diagnostic test and outpatient antibiotic prescription (OR: 0.20, p=0.006).

This study underscores the widespread inappropriate antimicrobial use for ILIs in a community in Vietnam, which contributes to an avoidable economic and health burden. The results of this study suggest that implementing diagnostic tools may support antimicrobial stewardship efforts.

Secondary and tertiary renal hyperparathyroidism (RHPT) are common sequelae of chronic kidney disease and are associated with worse patient mortality and quality of life. Clinical guidelines remain lacking with regard to recommendations for using intraoperative parathyroid hormone (IOPTH) during surgery for RHPT. A prospective randomised study will help evaluate the role of IOPTH in guiding surgery for secondary and tertiary RHPT.

Intraoperative parathyroid hormone monitoring to guide surgery in renal hyperparathyroidism is a pragmatic, multicentre, five-arm, parallel-group, patient-blinded and outcome assessor-blinded prospective pilot trial used to evaluate the feasibility of performing a definitive trial. Eligible participants include adult patients diagnosed with secondary or tertiary hyperparathyroidism who are candidates for subtotal or total parathyroidectomy. Consenting patients will be randomly assigned, through central allocation, in a 1:1:1:1:1 fashion to undergo surgery with IOPTH monitoring (four experimental arms: postexcision IOPTH samples taken at 10, 15, 20 or 25 min) or to undergo surgery without IOPTH monitoring (control arm). The primary feasibility objective is to estimate the percentage of eligible patients that are randomised: ≥70% proceed; 50–69% modify protocol before proceeding;

Ethics approval was obtained from the Hamilton Integrated Research Ethics Board. Pilot trial results will be shared widely through local, national and international academic and clinical networks and will be disseminated through conference presentations and publication in peer-reviewed journals.

NCT06542315, registered on 6 August 2024.

The association between smoking and patients with schizophrenia has been established through epidemiological studies on various populations. This behaviour not only increases the risk of medical comorbidities associated with smoking, but it can also interfere with treatment and ultimately worsen prognosis. This study aims to determine if nicotine use affects the cumulative number of psychiatric hospitalisations in patients with schizophrenia.

This is a retrospective cohort study using 2018–2023 electronic medical record data.

Data was collected at an inpatient psychiatric hospital in Central California.

There were a total of 825 patients with diagnoses of schizophrenia or schizoaffective disorder who were admitted to the mental health hospital between 2018 and 2023.

The primary outcome of interest was the number of psychiatric hospitalisations observed among the patients who were smokers versus those who were non-smokers. Our secondary objective was to determine the prevalence of certain medical comorbidities between these two groups.

60.7% of patients had a lifetime smoking history. Accounting for matching, patients who smoked had significantly (p

Patients with schizophrenia and a lifetime smoking history had significantly more hospitalisations compared with patients with schizophrenia who were non-smokers. This can inform disease course in vulnerable populations with a greater propensity to self-medicate with substances. However, further research should be conducted to investigate other factors that can affect this relationship.