After resuscitation from out of hospital cardiac arrest (OHCA), mechanical ventilation (MV) and respiratory management are fundamental to support patients in the intensive care unit (ICU) and to minimise secondary brain injury. Best practices for MV and association with clinical outcomes in patients with OHCA remain unclear.

This protocol describes a pre-planned respiratory-focused series of sub-analyses within the Sedation, Temperature and Pressure after Cardiac Arrest and Resuscitation (STEPCARE) trial, an ongoing interventional study evaluating 6-month mortality after randomisation in patients admitted to ICUs following OHCA. The primary aim is to describe real-world ventilator settings and gas-exchange targets during the first 72 hours after ICU admission in patients receiving invasive mechanical ventilation after OHCA. Secondary aims include to estimate the incidence of respiratory complications during ICU stay (eg, ventilator-associated pneumonia, acute respiratory distress syndrome, barotrauma); and to explore the association between early ventilator settings/gas-exchange parameters and 6-month outcomes (mortality and neurological status). Exploratory aim is to characterise weaning and extubation practices, including timing and failure rates.

Eligible patients will include adult STEPCARE participants receiving invasive MV after return of spontaneous circulation with available respiratory data recorded within the STEPCARE database.

Data collected in the STEPCARE trial that will be analysed include patients’ prehospital characteristics; clinical examination at hospital admission and at ICU admission; ventilator settings and arterial blood gases recorded at predefined time points during ICU stay. In particular: MV setting (mode, tidal volume, positive end-expiratory pressure, fraction of inspired oxygen, tidal volume, mechanical power, plateau/driving pressures), gas-exchange values (arterial partial pressure of oxygen and carbon dioxide, pH, arterial saturation of oxygen), timing of measurements and the occurrence/timing of respiratory complications and weaning outcomes.

The STEPCARE study has been approved by the regional ethics committee at Lund University (Dnr 2022-02425-01, Approved IRB on 2022-06-18) and by all ethics boards in the participating countries. No additional ethical approval is required for this predefined secondary analysis, as no further data collection or interventions will be performed. Findings will be disseminated through publication in peer-reviewed journals and, where appropriate, conference abstracts and presentations. Patients and the public were not involved.

NCT05564754.

To examine whether exposure to anti-herpetic drugs (AHDs: acyclovir, valacyclovir, famciclovir) is associated with reduced risk of Alzheimer’s disease (AD) treatment initiation.

Population-based retrospective matched cohort study.

University Groningen community pharmacy database IADB.nl, covering approximately 125 Dutch pharmacies (1994–2024).

262 757 adults aged 50–80 years without prior dementia or AD treatment. Exposed individuals with antiherpetic prescriptions (n=23 887) were matched 1:10 to unexposed controls (n=238 870) by age, sex and calendar time.

AHDs: acyclovir, valacyclovir, famciclovir.

Initiation of AD drug treatment, defined as at least two prescriptions for rivastigmine, donepezil, galantamine or memantine within 1 year. Cox proportional hazards models estimated HRs with 95% CIs, adjusted for comorbidities and medications. Analyses were stratified by period (1994–2018 vs 2019–2024) and drug type.

During follow-up, 2495 participants initiated AD treatment. The age of the participants was 65 (SD 9), and 59% were female. Any AHD exposure was associated with 90% reduced hazard of AD treatment (HR 0.09, 95% CI 0.07 to 0.13, p

AHD exposure was consistently associated with markedly lower risk of AD treatment initiation, with similar findings observed in recent years. These findings support the hypothesis that herpesvirus reactivation may contribute to AD pathogenesis and suggest antiviral therapy could have preventive implications. Confirmation through prospective studies and randomised trials is needed.

Emerging evidence supports a role for interleukin 6 (IL-6), a pro-inflammatory cytokine, in the pathogenesis of treatment-resistant major depressive disorder (TRD). However, interventional studies targeting IL-6 in this population remain scarce. Tocilizumab is a humanised monoclonal antibody that inhibits IL-6 signalling and is approved for the treatment of autoimmune conditions such as rheumatoid arthritis. The primary objective of this study is to examine whether IL-6 inhibition via tocilizumab can impact depressive symptoms, inflammation-related biomarkers and cognition in patients with TRD. A secondary objective is to compare the biological profiles of patients with TRD with elevated inflammation to those of healthy controls.

This is a proof-of-concept, randomised, parallel-group, triple-blind, placebo-controlled clinical trial. 22 adult outpatients diagnosed with TRD and evidence of low-grade inflammation (serum C reactive protein≥3 mg/L) will be randomised (1:1) to receive either one intravenous infusion of tocilizumab (8 mg/kg; maximum 800 mg) or normal saline, administered as an add-on to their ongoing treatment. Psychiatric, cognitive and biomarker assessments will be performed at baseline and at follow-up visits on days 7, 14 and 28 post-infusion. Additionally, 10 healthy controls with no psychiatric history will undergo the same baseline assessments for biomarker comparison.

The study has been approved by the Research Ethics Committee of the Hospital de Clínicas de Porto Alegre (Project number: 2025-0245, CAAE: 88904825.7.0000.5327). Findings will be disseminated through peer-reviewed publications, scientific meetings and, on request, lay summaries for participants.

NCT07052058.

An affordable heart-healthy dietary approach is essential for the management of familial hypercholesterolaemia (FH); however, the optimal dietary pattern and the role of adjunctive nutrient supplementation remain uncertain. This study aims to evaluate the effects of the Brazilian Cardioprotective Diet (DICA Br), adapted from the Portfolio Diet, with or without phytosterol and/or krill oil supplementation in individuals with probable or definite FH according to the Dutch Lipid Clinic Network (Dutch MEDPED) criteria.

The DICA-FH study is a national, multicentre, randomised, factorial, parallel-group, superiority, placebo-controlled clinical trial with a 1:1:1:1 allocation ratio. Participants aged ≥16 years receiving age-appropriate lipid-lowering therapy will be randomised into four groups: (1) adapted cardioprotective diet (DICA-FH) plus phytosterol placebo and krill oil placebo; (2) DICA-FH plus phytosterol 2 g/day and krill oil placebo; (3) DICA-FH plus phytosterol placebo and krill oil 2 g/day or (4) DICA-FH plus phytosterol 2 g/day and krill oil 2 g/day. All participants will undergo whole-genome sequencing and receive appropriate genetic counselling. Primary outcomes will be means of low-density lipoprotein cholesterol and lipoprotein(a) levels after 120 days. Secondary outcomes will include additional lipid biomarkers, adherence to protocol and adverse events. The planned sample size is 300 participants. Follow-up is expected to conclude in July 2026.

This study was registered under CAAE 65549622.2.1001.0060 and received ethical approval from the Hcor Research Ethics Committee (approval number 5.805.072) and the Brazilian National Research Ethics Commission (CONEP; approval number 6.864.951). Written informed consent will be obtained from all participants prior to enrolment. The study findings will be disseminated through peer-reviewed publications, scientific conferences and channels aimed at the general public.

NCT06331195.

Sexually transmitted infections (STIs) have emerged as significant public health concerns, imposing a substantial burden on both individuals and the healthcare system of the country. Additionally, STIs may also result in major extensive psychological consequences that profoundly affect individuals with STIs. Despite the government’s implementation of different initiatives aimed at addressing STI-related challenges, these conditions are associated with shame and stigma which act as barriers to the effective utilisation of healthcare services. The purpose of the present study is to generate evidence on barriers and facilitators to service utilisation and management of STIs in India.

Indian Council of Medical Research, New Delhi, is conducting a multi-centre study employing a mixed-method approach. The study involves different levels of healthcare systems, including both government and private healthcare facilities across seven sites in several states of India, including Maharashtra, Rajasthan, Punjab, Bihar, Uttar Pradesh and New Delhi. For the quantitative data, individuals seeking healthcare services related to STIs will be enrolled and assessed using a semi-structured pilot-tested questionnaire. In-depth interviews and focus group discussions will also be conducted with different stakeholders as per the standard guidelines of the qualitative method by the designated trained project staff. Descriptive and inferential statistics will be applied to the quantitative data, while the qualitative data will be analysed using a deductive approach with thematic content analysis.

The study protocol has been approved by the ethics review committees of all the participating sites individually. The findings from this study will be published in peer-reviewed journals and disseminated through scientific conferences and meetings among policy-makers and government agencies. AIIMS/IEC/2024/609; AIIMS/Pat/IEC/2024/1205; F. 7/BIOETHICS/AIIMS-RBL/APPROEM/2021/1; KIMSDU/IEC/11/2022; LHMC/IEC/2024/11; IEC/02/EX/2024; PGI/IEC/2024EIC000373.

Delayed post-polypectomy bleeding (DPPB) remains a significant complication of endoscopic resection, contributing to morbidity and increased healthcare costs. Although prophylactic clipping is widely practised to mitigate this risk, evidence from recent randomised controlled trials (RCTs) regarding its efficacy is inconsistent. This protocol outlines a systematic review and meta-analysis to evaluate the effectiveness of prophylactic clips following thermal resection.

We will conduct a comprehensive search of MEDLINE, EMBASE and the Cochrane Library from inception to 10 February 2026, to identify RCTs comparing prophylactic clips vs no clips in patients undergoing thermal endoscopic resection of non-pedunculated polyps. The primary outcome is DPPB within 30 days, defined as overt bleeding requiring medical intervention or a haemoglobin decrease ≥2 g/dL. Secondary outcomes include DPPB in proximal large (≥20 mm) lesions, perforation, post-polypectomy syndrome and procedure time. Data synthesis will use a random-effects model. Methodological quality will be assessed using the Cochrane Risk of Bias 2 tool. Publication bias will be visualised using funnel plots. We will quantify the effect of potential effect modifiers by meta-regression if appropriate. The quality of evidence will be evaluated according to the Grading of Recommendations Assessment, Development and Evaluation framework.

This study will not use primary data, and therefore formal ethical approval is not required. The findings will be disseminated through peer-reviewed journals and committee conferences.

CRD420251246840.

Neoadjuvant chemotherapy (NAC) followed by definitive treatment consisting of either radical radiotherapy or radical cystectomy is the recommended treatment for patients with organ-confined muscle-invasive bladder cancer (OC-MIBC). A randomised controlled trial (RCT) aimed to compare the effectiveness of radical radiotherapy and radical cystectomy but failed to recruit. Radical radiotherapy is non-invasive and organ-preserving, and observational studies have suggested this treatment may be associated with similar outcomes compared with radical cystectomy. However, in these observational studies, the risk of confounding was high, and they did not consider the receipt of NAC. The surgery or radiotherapy (SORT) for the early-stage cancer study will assess the comparative effectiveness and cost-effectiveness of either radical cystectomy or radical radiotherapy, both after NAC for OC-MIBC. We will use a target trial emulation approach to reduce the risk of bias when assessing comparative effectiveness from observational data.

The SORT study will use UK’s National Cancer Registry to identify individuals diagnosed with urothelial OC-MIBC (T2-4aN0M0) between 1 January 2015 and 31 December 2021 who received either radical radiotherapy or radical cystectomy after NAC. The data will be linked to Hospital Episode Statistics (HES), National Radiotherapy Data Set (RTDS) and Systemic Anti-Cancer Therapy (SACT) data sets to gather information on clinical, tumour and socio-demographic characteristics and receipt of treatment. Using the target trial emulation framework, we will define the eligibility criteria and radical radiotherapy and radical cystectomy receipt. To reduce the risk of confounding, we will use advanced statistical approaches to allow for differences in measured baseline characteristics between the comparison groups.

The primary outcome is 3-year all-cause mortality after radical treatment receipt. Secondary outcomes will include all-cause and bladder-cancer-associated mortality at 3 and 5 years, time to death, incremental costs and incremental cost-effectiveness reported according to net health benefits.

The study was approved by the London School of Hygiene and Tropical Medicine Ethics Committee (Reference number 29717 - 1). Results will be communicated in open-access journals and conferences to clinicians, researchers, patients and policymakers.

To map and synthesise existing evidence on pregnant women’s perceptions and experiences of social media communication for antenatal care (ANC).

Scoping review.

Four electronic databases (PubMed/MEDLINE, Embase, Web of Science and Google Scholar) alongside ‘grey’ and supplementary searches were conducted between December 202–January 2026.

All studies reporting pregnant women’s perceptions or experiences of social media communication for ANC.

Data were extracted independently by two reviewers using a structured charting framework. Extracted data were synthesised using a descriptive and narrative approach, with pregnant women’s perceptions and experiences analysed through reflexive thematic analysis.

Six studies met the inclusion criteria. Across platforms including WhatsApp, Facebook, Instagram and WeChat, pregnant women generally perceived social media communication as acceptable and beneficial, particularly for accessing trustworthy information, reassurance between visits, peer support and flexible engagement. Experiences varied by platform, moderation model and context. Key challenges included limited personalisation, variability in moderators’ capacity and responsiveness, digital literacy barriers, data affordability, privacy concerns and sociocultural influences. Equity-related considerations were recurrent, highlighting the potential for uneven experiences if digital communication is not carefully designed and standardised.

Social media communication is generally experienced positively by pregnant women as a complement to routine ANC, particularly when professionally moderated and responsive to women’s informational needs. However, variability in experiences and equity-related challenges underscore the need for further research and careful implementation. This scoping review provides a preliminary mapping of the evidence and identifies priorities for future qualitative synthesis, primary research and the development of inclusive, person-centred digital ANC communication strategies.

Patients on low-dose prednisolone may develop adrenal insufficiency causing reduced health-related quality of life (HRQoL) and increased risk of adrenal crisis. This study examines whether supplemental hydrocortisone during mild to moderate stress improves HRQoL in patients with polymyalgia rheumatica/giant cell arteritis (PMR/GCA) with adrenal insufficiency on low-dose prednisolone.

A multicentre, randomised, double-blinded, placebo-controlled, clinical trial including patients with PMR/GCA receiving ongoing prednisolone ≤5 mg/day. Eligible patients undergo an adrenocorticotropic hormone (ACTH) test, and 250 patients with a stimulated cortisol

The study is approved by the Ethics Committee of the Capital Region of Denmark and the Danish Medicines Agency. Recruitment began June 2022. The last patient’s last visit is expected in 2026. Results will be disseminated via peer-reviewed publication and conference presentations.

EudraCT:2021-002528-18, CTIS:2024-518272-30-00, NCT05435781.

Both dermatological and neurological manifestations characterise neurocutaneous syndromes (NCSs). Although individually rare, collectively they impose a substantial clinical, humanitarian and economic burden, often contributing to barriers in healthcare access. This scoping review aims to map global evidence on healthcare access and service utilisation in NCSs and identify barriers, facilitators and gaps in care.

This scoping review will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines. Bibliographic databases and hand searches will be used to identify relevant studies. Published and grey literature addressing healthcare access will be included while non-English studies will be excluded. Two independent reviewers will perform study selection and data extraction. Quality assessment will be conducted for full-text studies using the Joanna Briggs Institute tools. Findings will be mapped to evidence on healthcare access, service utilisation, treatment patterns, barriers and facilitators and will be presented using tables and geographic mapping.

This scoping review will use publicly available data and therefore does not require ethical approval. The findings will be published in a peer-reviewed journal.

Postextubation swallowing disorders (SD) are common in the intensive care unit (ICU) and are associated with severe complications, including aspiration pneumonia, a three-fold increase in reintubation risk and higher mortality. While fibreoptic endoscopic evaluation of swallowing (FEES) and videofluoroscopy are gold standards for diagnosis, they are often impractical or impossible to perform on intubated patients. The use of ultrasound offers a non-invasive, bedside alternative to evaluate the musculoskeletal structures involved in swallowing. The Echographie Identifier les troubles de Déglutition Acquis en Réanimation (EIDAR) study aims to evaluate the diagnostic performance of pre-extubation ultrasound in identifying patients at risk of SD following mechanical ventilation.

This prospective, monocentric diagnostic study conducted at the Dijon University Hospital ICU will include 100 adult patients ventilated for ≥48 hours. The primary outcome is the presence of SD, defined as a Penetration-Aspiration Scale score >2 during a FEES procedure performed 3 to 24 hours postextubation and independently assessed by an otolaryngologist blinded to index test results. Pre-extubation cervical ultrasound (Index Test) will be performed within 3 hours prior to extubation and measure hyoid bone ascension (primary variable of interest), geniohyoid muscle surface area and digastric muscle cross-sectional area. The diagnostic performance of cervical ultrasonographic parameters will be assessed using their discriminative capacity via a receiver operating characteristic curve. The feasibility of the ultrasound procedure in a critical care setting will also be assessed.

The study received a favourable opinion from the independent ethics committee CPP Ouest III and is registered with the French health authority ANSM (national agency on safety in medicine and health products). It is conducted in accordance with the Declaration of Helsinki and Good Clinical Practice guidelines. Participants or their proxies provide free and informed oral consent. Results will be submitted for publication in peer-reviewed medical journals and presented at international conferences.

RCB 2023-A00461-44 and NCT05922085

Access to musculoskeletal healthcare services in Sub-Saharan Africa is inadequate. As osteoarthritis is the most prevalent chronic osteoarticular disease globally, it’s essential to understand its social and economic impact, as well as the determinants of inequities in access to healthcare services in Sub-Saharan Africa. The absence of systematised knowledge on this topic makes this review pertinent. However, due to data scarcity, assessing this burden is challenging. The objective of this scoping review is to map and summarise the available literature up to 2025 on the socioeconomic burden and health inequity determinants among the Sub-Saharan African population with osteoarthritis.

A predefined search strategy will be applied to MEDLINE (via PubMed), Embase, African Journals Online and African Index Medicus to incorporate articles relevant to adults diagnosed with osteoarthritis who are residents of sub-Saharan Africa. We will also include grey literature sources such as Google Scholar, Research Square, manuals, books, medical society websites, secondary databases, theses and dissertation repositories and conference proceedings. Study selection will be conducted in two stages by a pair of reviewers who will independently screen titles and abstracts according to the eligibility criteria, followed by a full-text review of the selected studies. The search period was from October 2025 to January 2026. Data extraction will be performed using a standardised charting form developed by the review team.

This scoping review maps evidence on OA-related socioeconomic impacts and healthcare inequities in Sub-Saharan Africa. As a secondary data analysis, ethical approval is not required. Findings will be disseminated via peer-reviewed journals and academic conferences to clinicians and policymakers.

A good limb position (GLP) plays an important role in the rehabilitation process of patients who have had a stroke with hemiplegia. However, there remains a lack of effective assessment tools for clinical nurses to evaluate their GLP management practices.

This study aimed to develop and test the psychometric properties of the Good Limb Position Management Scale for Stroke Patients with Hemiplegia by Nurses (GLPMSSPHN).

A quantitative and cross-sectional design.

89 hospitals in 16 cities of China.

A total of 516 participants completed the questionnaire and were finally used for the analyses.

An initial scale was developed based on the Capability, Opportunity and Motivation-Behaviour model combined with a comprehensive literature review, semi-structured interviews, Delphi expert consultations and a pilot test. A field survey was then performed using the initial scale to test the reliability and validity of the scale. Reliability analysis was conducted by calculating Cronbach’s α coefficients and test–retest reliability. The results of exploratory factor analysis and confirmatory factor analysis were used as the validity index to further verify the model structure of the scale and develop a formal scale.

The GLPMSSPHN was formulated with 4 dimensions and 35 items. Exploratory factor analysis extracted four factors, with a cumulative variance contribution rate of 81.842%, and confirmatory factor analysis indicated that the scale had good construct validity. The Cronbach’s α coefficient of the scale was 0.978, and the test–retest reliability was 0.863.

The GLPMSSPHN has ideal reliability and validity and provides a valid and reliable tool for clinical nurses to identify and assess the management level of GLP in patients who have had a stroke with hemiplegia.

In current practice, fluid volumes administered to children following kidney transplant vary widely. Up to 52% of children experience fluid overload-related complications. Current fluid guidelines are not evidence-based and the optimal amount of fluid for children after transplant is not known. The aim of Randomised multiple centre trial of conservative versus LIberal fluid adMInisTration for children receiving a kidney tranSplant (LIMITS) is to determine whether relative limitation of fluid volume administered to children receiving kidney transplants is superior to liberal fluid volume administration.

LIMITS is a pragmatic, open-label, UK-based, multicentre randomised controlled trial, with an internal pilot phase and integrated economic evaluation. A total of 140 children receiving kidney transplants will be randomised to receive either conservative postoperative fluid administration (maximum of 150 mL/m²/hour for no longer than 18 hours, followed by a fixed daily target of maximum 1.5 L/m²/day thereafter) versus the comparator of liberal postoperative fluid administration (fluid volume administered to replace urine output and insensible losses for at least 48 hours with target urine output >2 mL/kg/hour). The primary outcome is mean days at home in the first 30 days after kidney transplant. The primary outcome will be analysed using a mixed linear regression model adjusted for donor type (living vs deceased donor) and participant weight (

The trial received Health Research Authority approval on 20 August 2025 (REC reference: 25/EE/0161, IRAS project ID: 354370). Findings will be presented to academic groups via national and international conferences and peer-reviewed journals. The patient and public involvement group will play an important part in disseminating the study findings to the public domain.

ISRCTN21516608.

Irrational prescribing is a major global health concern, contributing significantly to increased morbidity, mortality and antimicrobial resistance (AMR). Despite existing knowledge and awareness, irrational antibiotic use remains prevalent among healthcare professionals.

This qualitative study aimed to explore the contributing factors to irrational antibiotic prescribing, understand healthcare professionals’ perceptions, identify barriers to rational use and gather suggestions for improving rational antibiotic use.

A qualitative study using semi-structured interviews was conducted with participants. A total of 60 healthcare professionals (20 physicians, 20 pharmacists and 20 nurses) participated after providing verbal consent.

Semi-structured interviews were conducted with healthcare professionals across various clinical settings in Pakistan until data saturation was reached. The Consolidated Criteria for Reporting Qualitative Research (COREQ) checklist was used to ensure transparent reporting. An inductive thematic analysis approach was employed and themes and subthemes were developed from the data.

The findings revealed a generally good understanding of irrational prescribing. Contributing factors included prescriber-related issues, patient expectations, weak regulatory oversight and underutilisation of pharmacists. Key barriers identified were financial constraints, lack of awareness and insufficient resources. Suggestions for improvement included regular audits, public awareness campaigns, an integrated healthcare system, interprofessional collaboration, drug utilisation reviews, adverse drug reaction reporting, standardising hospital policies and strengthening regulatory frameworks.

This study highlights critical factors and barriers contributing to irrational antibiotic prescribing and presents practical suggestions to improve rational use. Implementing evidence-based approaches, updating clinical guidelines, and promoting awareness among healthcare professionals are essential steps toward improving prescribing practices and combating AMR.

This study aimed to investigate the associations of adolescents’ self-reported family financial stress, registry-based parental household income and parental education with adolescent anxiety and depression symptoms. Additionally, we adjust these associations for parental anxiety and depression symptoms and examine potential secular changes in these associations.

Family linkage study, using two cross-sectional population-based health studies, the Young-HUNT study and the HUNT study. Registry-based data from Statistics Norway (SSB).

Northern part of Trøndelag County, Norway.

Adolescent (aged 13–19 years) participating in The Young-HUNT3 Survey (2006–2008, n=8199) and The Young-HUNT4 Survey (2017–2019, n=8066) and their parents participating in The HUNT3 Survey (2006–2008, n=50 800) and the HUNT4 Survey (2017–2019, n=56 042).

Adolescent anxiety and depression symptoms were assessed by a short version of the Hopkins Symptom Checklist (HSCL), the five-item HSCL-5. Self-reported family financial stress was measured using a single-item question. Parental anxiety and depression were assessed by the 14-item Hospital Anxiety and Depression Rating Scale (total HADS score). Parental income and parental education were obtained from SSB. We use a multilevel mixed-effects generalised linear model.

Adolescents who perceived their family financial stress as worse than others reported a higher SCL-5 total score compared with those with self-perceived average financial stress. The relative differences ranged from 1.16 (95% CI 1.09 to 1.23) in boys to 1.24 (95% CI 1.17 to 1.31) in girls. In contrast, little or no association was found between parental registry-based income or educational level and adolescents’ mean SCL-5 total scores. Adjusting for parental HADS scores did not alter the estimates. With a few exceptions for girls, there was no evidence for a secular change in these associations.

Self-perceived family financial stress, but not registry-based parental income and education, was associated with elevated anxiety and depression symptom levels in adolescents, and findings were essentially the same in Young-HUNT3 and Young-HUNT4. These findings underscore the importance of incorporating multiple measures of socioeconomic status when investigating socioeconomic inequalities in adolescent mental health.

Major depressive disorder (MDD) is a prevalent mental illness characterised by persistent sadness, loss of interest in activities and cognitive impairment. While pharmacological and psychotherapeutic treatments remain the standard for MDD management, non-pharmacological interventions, such as aerobic exercise, have gained attention for their potential benefits in reducing depressive symptoms and improving quality of life. Although several studies have explored the effectiveness of aerobic exercise in managing MDD, there is still no comprehensive synthesis of the existing evidence. This study aims to synthesise existing evidence on the effects of aerobic exercise interventions in the management of individuals diagnosed with MDD.

The systematic review will be conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocol (PRISMA-P) guidelines. A comprehensive search will be conducted across Cochrane, Medline, PEDro, CINAHL, Scopus, Web of Science and BioMed Central databases. Search terms will be developed using the Population, Intervention, Comparison, Outcome and Study design (PICOS) framework, incorporating keywords and Medical Subject Headings related to ‘Major Depressive Disorder’, ‘Aerobic Exercise’, ‘Depression’, and ‘Quality of Life’. Only intervention studies, including randomised controlled trials, quasi-experimental and pre–post intervention studies, will be included involving adults aged 18 years or older diagnosed with MDD according to standardised criteria (eg, Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition and International Statistical Classification of Diseases and Related Health Problems -10 (ICD-10)). For included intervention studies, the comparator will be standard care, placebo or no-exercise control groups. The primary outcome is change in depressive symptoms, and secondary outcomes include quality of life, anxiety and stress-related biomarkers. Three independent reviewers will screen studies, extract data using Covidence software (Veritas Health Innovation in partnership with Cochrane) and assess study quality using the updated Cochrane Risk of Bias 2.0 (Rob-2) tool alongside the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. If feasible, a meta-analysis will be conducted using RevMan V.5.4 (Cochrane's Review Manager), with effect sizes determined by mean differences, standardised mean differences or ORs, depending on the outcome type. This study is currently at the proposal stage, with article searches expected to begin in November 2025 and data extraction anticipated to be completed by January 2026.

No ethical approval is required as this review uses existing published data. Findings will be disseminated through a peer-reviewed journal and presented at academic conferences.

CRD420251151897.

To analyse the completeness of the COVID-19 vaccination schedule and identify factors associated with vaccine uptake.

Cross-sectional study.

Data were collected through face-to-face interviews conducted in all 26 Brazilian state capitals and the Federal District between 2022 and 2023, using a sequential sampling approach.

A total of 1392 individuals aged 18 years or older experiencing homelessness for at least 6 months were included.

The primary outcome was the completeness of the COVID-19 vaccination schedule (complete vs incomplete), based on self-reported vaccination status. Secondary analyses examined sociodemographic, institutional and behavioural factors associated with vaccine uptake using binary logistic regression.

Completion of the vaccination schedule was positively associated with receiving government aid (OR: 1.58; 95% CI 1.09 to 2.30), visits from street clinic health agents (OR: 3.19; 95% CI 1.95 to 5.36), prior COVID-19 diagnosis (OR: 5.77; 95% CI 3.17 to 11.15), support for mandatory vaccination (OR: 3.76; 95% CI 2.48 to 5.76), trust in vaccine efficacy (OR: 3.92; 95% CI 2.63 to 5.89), seeking information from community sources (OR: 1.91; 95% CI 1.01 to 3.88) and trust in federal authorities (OR: 1.57; 95% CI 1.06 to 2.31).

This study identified structural, social and individual factors associated with complete COVID-19 vaccination among people experiencing homelessness in Brazil. Although overall coverage was substantial, gaps in vaccination completeness persisted. Social support, healthcare outreach and trust in vaccines were associated with higher uptake, highlighting important barriers and facilitators to vaccination in socially vulnerable populations.