Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) entails substantial morbidity and mortality, yet no epidemiologic evidence exists on its outcomes in Mexico. This study assessed national hospitalisations (2005–2022) and mortality (2000–2022) related to AAV using data from the General Board of Health Information.

Retrospective, population-based time-trend analysis on administrative health data.

Mexico’s national hospital discharge and mortality registries, covering 1 January 2000 through 31 December 2022.

All individuals aged ≥ 15 years with a primary or secondary International Classification of Diseases, 10th revision, diagnosis of AAV recorded during hospitalisation or on death certificates nationwide.

The study’s primary outcomes were the age-standardised hospitalisation and mortality rates for AAV (expressed per 100 000 population, overall and by sex), with temporal trends in both rates quantified using Joinpoint regression to calculate annual percent change (APC) and average APC (AAPC).

We identified 2804 hospitalisations and 599 deaths. Females accounted for 49.7% of hospitalisations, while males represented 48.7% of deaths. Although the overall age-standardised hospitalisation rate (ASHR) and mortality rate (ASMR) AAPCs were not statistically significant, relevant trends emerged. From 2010 to 2022, ASHR declined significantly (APC: –5.2%; 95% CI –9.7, –0.5; p=0.03), whereas mortality rates remained stable from 2000 to 2022 (AAPC: +3%; 95% CI –4.6, 11.3; p=0.45). Nevertheless, mortality increased among males (APC: +6.4%; 95% CI 0.9, 12.2; p=0.02) and individuals over 45 years (APC: +8.6%; 95% CI 1.7, 16.0; p=0.02) from 2008 onwards.

Overall, these findings indicate no major changes in national rates but reveal a decline in hospitalisations since 2010 and a rise in mortality for specific subgroups since 2008. Targeted interventions, particularly for older adults and men, appear warranted to address this evolving disease burden. Future research should explore underlying risk factors and evaluate tailored strategies to improve clinical outcomes in AAV across Mexico.

Chronic caregiving stress accelerates biological aging, reflecting disease risk and mortality; however, the underlying mechanisms are poorly understood. Epigenetic clocks, which can be estimated from levels of DNA methylation in a subset of cytosine-phosphate-guanine loci in the genome, have been proposed as a promising biological age estimator. The objectives of this scoping review are to systematically scope the literature on the effects of stress on biological ageing measured by epigenetic clocks in family caregivers of patients diagnosed with cancer.

This review will be conducted following Joanna Briggs Institute methodology based on Arksey and O’Malley’s and Levac et al’s framework and reported using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for scoping reviews. Studies will be included if (1) the studies focus on unpaid family caregivers of patients diagnosed with cancer; (2) caregivers are adults (≥18 years of age) and (3) the study measured epigenetic clocks. The search will encompass literature and peer-reviewed literature in PubMed/MEDLINE (National Library of Medicine), Embase (Elsevier), Cochrane CENTRAL (Wiley & Sons), Web of Science: Core Collection (Clarivate Analytics), CINAHL (EBSCOhost) and PsycInfo (American Psychological Association).

Since the scoping review methodology focuses on published literature, this study does not require ethical approval. We will publish our findings in a peer-reviewed journal and plan to disseminate our work in conferences and scientific meetings.

Open Science Framework (https://doi.org/10.17605/OSF.IO/KW7RT).

Most clinical practice guidelines (CPGs) for assessing and managing people’s chronic pain focus on specific pain conditions, body sites or life course stages. This creates complexity for clinicians making care choices in the absence of a diagnosis and/or where a person experiences more than one pain condition. Specific to this context is the ICD-11 classification of chronic primary pain where an experience of pain cannot be better accounted for by another condition. CPGs for chronic primary pain, agnostic to condition or body part, may support clinicians towards best pain care since many of the principles of person-centred chronic pain care are transdiagnostic. The two aims of this systematic review are to (1) identify and appraise CPGs for chronic primary pain, relevant across the life course and (2) map the CPG content against a pain care priority framework to evaluate the extent to which the CPG content aligns with the priorities of people with lived chronic pain experience.

We will systematically search nine scholarly databases, the Epistemonikos database and international and national guidelines clearinghouses. CPGs published within 2015–2025, in any language, that offer recommendations about assessment and/or management of chronic primary pain for people of any age, excluding hospitalised inpatients or institutionalised populations, will be included. Pairs of reviewers will independently screen citations for eligibility and appraise CPG quality and implementation potential using the Appraisal of Guidelines for Research and Evaluation (AGREE)-II and the AGREE-Recommendations Excellence tools, respectively. Data extraction will include the citation and scope characteristics of each CPG, methods used to develop recommendations, verbatim recommendations, guiding principles or practice information and narrative excerpts related to the GRADE Evidence-to-Decision (EtD) considerations (or equivalent). We will use the PROGRESS-PLUS framework as a checklist to identify whether determinants of health equity were considered by guideline developers. CPG recommendations will be organised according to common topics and categorised in a matrix according to strength and direction. Qualitative content analysis will be used to synthesise excerpts relating to GRADE EtD considerations (or equivalent), and we will map extracted data against an established chronic pain care priority framework to determine the extent to which the CPGs align with values and preferences of people with lived experience. Interpretation will be informed by an interdisciplinary Advisory Group, including lived experience partners.

Ethical approval is not required for this systematic review. Results will be disseminated through publication in an open-access peer-reviewed journal, through professional societies, and integrated into education curricula and public-facing resources. Reporting will be consistent with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement.

CRD420251000482.

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.

Persistent epithelial defect (PED) management can be challenging. First line of treatment includes lubrication, bandage contact lenses and punctal plugs. The second line of treatment includes autologous serum (AS). Topical insulin has been shown to be safe for topical use and improve corneal epithelial healing. Therefore, a controlled clinical trial (control group with current standard treatment, ie, AS) multicentre, randomised and with a blind third observer will be conducted to evaluate the efficacy and safety of the use of insulin eye-drops in the treatment of PED.

A preselection of patients with epithelial defect after 1 week of treatment will be made and blood tests will be obtained in order to dispense AS if necessary. After 2 weeks of standard treatment, if the PED persists and the patient meets criteria, patients will be enrolled after signing an informed consent form. Patients will be randomly allocated to receive either insulin (1 UI/mL, 4 times a day) or AS (20%, 5–6 times a day) eye-drops for 3 months. 234 patients will be included, 117 in each treatment group. The main variable (PED size) will be obtained from slit-lamp photographs, an objective and easily quantifiable variable which will be evaluated by a blinded investigator (third observer). Patients will be examined every 3–5 days until week 4 of study treatment and once a week until 6 weeks, to continue with a visit every 2 weeks until reaching 3 months of follow-up. Primary endpoints are: complete epithelialisation, epithelialisation rate (initial defect area/days until epithelialisation) and time until complete closure.

Ethical approval has been obtained from Hospital Clinico San Carlos in Madrid and Agencia Española del Medicamento y Productos Sanitarios (AEMPS). The findings will be disseminated in peer-reviewed publications and presentations at meetings.

EudraCT 2022-003589-19.

This study aims to review whether both clinical and Patient Reported Outcome Measures (PROMs) of Reverse Shoulder Arthroplasty have improved over time using the National Joint Registry (NJR).

This study is a population-based cohort study using the NJR and Hospital Episode Statistics for England.

Publicly funded hospitals and procedures in England from 1 January 2013 to 31 December 2021.

All patients that received a reverse shoulder arthroplasty (RSA) in the specified time period. Patients were excluded if they had less than 1 year of follow-up.

Primary outcome was revision at one year. Secondary outcomes were non-revision re-operation and mortality at one year, length of stay (LOS) and mean change in Oxford Shoulder Score (OSS) from pre-operatively to 6 months post-operatively.

There were 24 411 RSA cases available for analysis. There was no significant improvement in revision rates over time; however, there was a significant reduction in non-revision re-operations (OR 0.93 (0.86–0.99) p=0.03) and mortality (0.96 (0.92–1.00) p=0.04). LOS over time improved with an average reduction of 0.24 days per year, ranging from a mean of 3.94 days in 2013 to 2.44 days in 2021 (p

Over the 9-year period recorded in the NJR, revision rates were low and remained similar. There has, however, been an improvement in other clinical outcomes such as non-revision reoperation and mortality as well as functional outcomes and reduced LOS, which demonstrates progress in the quality of care provided to shoulder replacement patients and is suggestive of advancements in surgical techniques, perioperative management and rehabilitation strategies.

The ageing population in Europe is experiencing a significant rise in urinary incontinence (UI), which affects millions and incurs substantial healthcare costs. While conservative treatment (eg, behavioural strategies, pelvic floor exercises) can help manage UI, there is a need for evidence-based eHealth solutions to improve adherence and treatment outcomes. The KOKU Bladder project aims to co-create, develop and test an eHealth intervention to improve bladder health (BH) and UI in adults aged 50 and over.

Phase 1 will consist of the co-creation and technological development of the eHealth solution. First, a rapid review will be undertaken to identify eHealth solutions (ie, technologies and websites), including behaviour change techniques (BCTs) and elements of gamification for self-management of BH and UI in adults aged 50 and over. Also, a consultation with eight experts on BH/UI and/or BCTs will be conducted to explore recommendations for the new eHealth solution. The PROSECO framework will facilitate an assessment of the co-creation process. Phase 1 will additionally include the conduction of at least six focus groups, to be held in Kaunas (Lithuania), Catalonia (Spain) and Manchester (UK) to co-create the contents of the digital solution. Each focus group will include 10–12 community-dwelling adults aged 50+, with different physical conditions and continence status, as well as health professionals and other stakeholders. The information collected will be analysed thematically. First, we will hold three focus groups, one in each country, to find out the opinion of the participants. Once the focus groups are finished and the first version of the technological solution is created, participants will test it and provide feedback in three additional focus groups. Participants’ opinions will be taken into account to make modifications to the solution and co-create the final version. Gamification methods and the Honeycomb model for user experience will be followed in order to achieve a technological solution that is adequate for its target population.

Phase 2 will consist of a multicentre pilot study with a mixed method (quantitative and qualitative) approach to assess the feasibility and acceptability of the newly developed technological solution. At least 120 participants (40 per country) will be recruited and randomised into two groups: intervention (KOKU Bladder) and control (indirect health education). The primary outcome will be the severity of UI, according to the International Consultation on Incontinence Questionnaire-UI short form. Secondary outcomes will include quality of life (EuroQol 5-Dimension, 5-Level), life-impact related to UI (Incontinence Impact Questionnaire-7), lower urinary tract symptoms (Symptoms of Lower Urinary Tract Dysfunction Research Network Symptom Index-10 (LURN SI-10)), International Consultation Questionnaire on Incontinence Bowel Score, Patient Global Impression of Improvement; levels of physical activity and sedentary behaviour (accelerometer), as well as satisfaction with treatment (Client Satisfaction Questionnaire (CSQ-8)). The latter, together with recruitment, adherence, retention, attrition and data loss, will be used for measuring intervention feasibility and acceptability. Statistical and clinical significance, as well as effect size, will be calculated.

The project is approved by the Research Ethics Committee of IRIS-CC approved the project on 9 January 2025 (code 24/095), the Research Ethics Committee of Hospital Universitari Arnau de Vilanova of Lleida on 27 January 2025 (CEIC-3201), the Commission on Research Ethics of Lithuania on 3 March 2025 (SMTEK-31) and the Research Ethics Committee 3 of the University of Manchester on 13 August 2025 (2025-23619-43258). Participation and withdrawal will be voluntary. Informed consent will be obtained from candidates willing to join the project. Study results will be disseminated via publication of scientific articles, presentations at professional workshops, webinars and congresses, as well as through social media and lay summaries for participants and the general public.

NCT06583733.

CRD42024597624.

Patients in intensive care units (ICUs) frequently require mechanical ventilation, with approximately half needing invasive ventilation through an orotracheal tube. For these patients, gastric tube (GT) insertion is routinely performed to administer nutrition and medications or to drain gastric contents. The insertion route (oral or nasal) may affect the incidence of ventilator-associated pneumonia (VAP), a significant ICU care complication. This study aims to compare the impact of oral versus nasal GT insertion on the incidence of VAP in intubated ICU patients.

The SONG trial (NCT 05915663) is a multicentre, open-label, two-period, two-intervention, cluster randomised crossover superiority trial. 16 French ICUs will participate. ICUs will be randomised to periods of nasogastric or orogastric tube placement. The trial includes a practice standardisation period, followed by two 12-month inclusion periods separated by a monitoring and washout period. The primary endpoint is the incidence rate of VAP at day 28, confirmed by three independent physicians. Secondary endpoints include the ease of GT insertion, measured by the number of attempts.

This study received approval from a central ethical review board on 12 April 2024 (CPP Sud-est VI, registration number 23.00943.000175). Patients are included after informed consent or, when not possible, from next of kin. If none are available, the investigator will proceed with emergency inclusion, following French law. When consent is initially obtained from the next of kin or through emergency inclusion, the investigator will seek consent from the patient as soon as possible. Data will be anonymised and patient confidentiality maintained. Results will be published in peer-reviewed journals and presented at scientific meetings.

NCT05915663.

To assess the incidence of delirium and its predictors among adult patients admitted to the intensive care units of comprehensive specialised hospitals in the Amhara region of northwest Ethiopia from 18 October 2024 to 20 February 2025.

A multicentre prospective observational study was conducted.

Four comprehensive specialised hospitals in the Amhara region of northwest Ethiopia, from 18 October 2024 to 20 February 2025.

A total of 351 patients were included in the final analysis during the study period.

The primary outcome measure of this study was the incidence of delirium. Additionally, the study investigated the factors associated with delirium incidence among adult patients admitted to intensive care units.

The incidence of delirium among adult patients in intensive care units was 42.17% (95% CI: 37.08 to 47.42). Pain (adjusted HR (AHR) = 4.74; 95% CI: 2.38 to 9.44), mechanical ventilation (AHR = 2.96; 95% CI: 1.56 to 5.63), age 65 years or older (AHR = 2.18; 95% CI: 1.48 to 3.21) and agitation (Richmond Agitation-Sedation Scale (RASS) ≥1) (AHR = 3.26; 95% CI: 2.09 to 5.09) were statistically significant factors associated with delirium.

In the present study, more than one-third of patients developed delirium. Pain, mechanical ventilation, age 65 or older and agitation (RASS≥1) were significantly associated with delirium occurrence. To reduce the incidence of delirium, the current study recommends treating or preventing pain and agitation. Additionally, special attention should be given to patients receiving mechanical ventilation and those aged 65 or older during care.

Neonatal death and later disability remain common sequelae of hypoxic-ischaemic encephalopathy (HIE) despite the now standard use of therapeutic hypothermia (HT). New therapeutic approaches to brain protection are required. Melatonin is an indolamine hormone with free-radical scavenging, antiapoptotic, anti-inflammatory and gene regulatory neuroprotective properties, which has extensive preclinical evidence of safety and efficacy. Pharmacokinetic (PK) data suggest it is necessary to reach melatonin levels of 15–30 mg/L within 6–8 hours of hypoxia-ischaemia for brain protection. We developed a novel Good Manufacturing Practice (GMP) grade melatonin in ethanol 50 mg/mL solution for intravenous use. In preclinical studies, ethanol is an adjuvant excipient with additional neuroprotective benefit; optimised dosing protocols can achieve therapeutic melatonin levels while limiting blood alcohol concentrations (BACs).

The Acute High Dose Melatonin for Encephalopathy of the Newborn (ACUMEN) Study is a first-in-human, international, multicentre, phase 1 safety study of intravenous melatonin in babies with moderate/severe HIE receiving HT. Sixty babies will be studied over two phases: a dose escalation study including four dose levels to establish the recommended phase 2 dose (RP2D), followed by a 6-month cohort expansion study of RP2D to further characterise PKs and affirm safety. Participants will receive a 2-hour intravenous infusion of melatonin within 6 hours of birth, followed by five maintenance doses every 12 hours to cover the period of HT. Plasma melatonin and BACs will be monitored. The RP2D will be based on the attainment of therapeutic melatonin levels while limiting BACs and the frequency of dose-limiting events (DLEs). A Bayesian Escalation with Overdose Control approach will be used to estimate the risk of DLE per dose level, with a target level of

Approval has been given by the London Central National Health Service Health Research Authority Ethics Committee (25/LO/0170) and UK Clinical Trials Authorisation from the Medicines and Healthcare products Regulatory Agency. Separate approvals have been sought in Ireland and Australia. Dissemination will be via peer-reviewed journals, conference presentations, public registries and plain language summaries for parent/legal guardian(s), in accordance with national requirements.

ISRCTN61218504. EU CT: 2025-520538-49-00.

Publication based on the UK protocol V.3.0, 08 May 2025

Indigenous Mayan-Yucatecan communities in Mexico have a high prevalence of chronic non-communicable diseases (NCDs) such as diabetes, hypertension, obesity and rheumatic diseases (RMDs). According to the syndemic theory, these diseases combined with social, economic and cultural factors affect the quality of life. The aim of this protocol is to describe the methodological process to create, implement and evaluate a Syndemic-Based Care Model (SCM), using a Community Based-Participatory Research (CBPR) strategy in three Mayan-Yucatecan communities.

This is a convergent mixed-methods protocol. The quantitative component is a before-after study, and the qualitative component is an ethnographic study. The intervention will be a SCM co-constructed with Mayan communities based on their particular needs and aiming for reduction of the negative impact of NCD/RMD through a multidisciplinary approach. We will follow four phases of the CBPR: (1) situational analysis, through community censuses and semistructured interviews to understand the prevalence of NCDs and the syndemics in these communities; (2) co-construction of the elements of a SCM based on the health priorities identified by researchers, community members and healthcare workers; (3) implementation of this SCM and (4) evaluation of the SCM through (1) statistical analyses involving the construction of a syndemic index through stepwise logistic regression of the normalised and standardised key clinical, social and economic variables; interval and ratio variables will be normalised by their z-score and categorical variables will be one-hot encoded; similarity and social networks analysis with clustering to identify syndemic subpopulations; and cost-effectiveness and cost-utility analyses using Markov modelling and (2) narrative and thematic qualitative analysis of the SCM’s implementation and impact on community members’ health, function and quality of life.

Research ethics boards of participant institutions approved this research protocol. This project will be presented to municipal authorities, community meetings and community leaders for observation and acceptance. For people who wish to participate, informed consent will be provided written and verbally in Spanish or Mayan-Yucatecan according to the participant preferences, and it can be signed by either autograph or fingerprint. The results of this research will be disseminated to various groups: (a) local and regional authorities of the Mexican health system and municipal authorities; (b) the participating communities will be informed in an assembly of the results and (c) academic dissemination will be done through publications in public science journals and institutional press releases and will also be presented at national and international congresses or symposia.

Post-intensive care syndrome (PICS) describes a cluster of ongoing symptoms experienced by a large proportion of patients previously admitted to critical care. Despite a large rise in survival following critical care, interventions to support recovery and combat PICS are lacking. It has been suggested that the use of digital tools such as virtual reality (VR) may play a useful role in the development of recovery-supporting interventions. We engaged with people with lived experience of critical care admission to coproduce a VR intervention (ViRtual REality to AiD recoverY post ICU (VR READY)). Here, we present a protocol for the initial feasibility and acceptability testing of this intervention.

This is a single-arm, single-site, non-randomised feasibility trial of VR READY. Up to 25 participants recently admitted to critical care will be recruited to use the VR READY intervention for at least 5 min per day for a period of 14 days. Participants must have capacity to consent and be free from ongoing delirium in order to participate. Outcomes relating to sleep and well-being will be measured at baseline and at day 14 after intervention delivery. The primary outcome is feasibility, which will be assessed according to prespecified criteria. Participants will complete a qualitative interview to assess acceptability of the intervention, trial design and outcomes approximately 1 month after completing the intervention period. No formal statistical analysis of outcomes will be conducted, but these will be summarised descriptively. Interviews will be subjected to reflexive thematic analysis.

This study received a favourable ethical opinion by North-East York Research Ethics Committee (Ref 23/NE/0113) in June 2024. Study results will be disseminated through the peer review literature, ISRCTN registry and directly to participants, which will be facilitated by the study public and patient involvement steering group.

ISRCTN88854487.

There remains little consensus or guidelines for the clinical management of traumatic orbital fractures (OFx). The OFx Registry aims to increase real-world clinical evidence for the treatment of OFx via prospective, multicentre, international data collection. The primary objectives of this observational cohort study are (1) to document current treatment practices for and (2) to assess the outcomes of surgical and non-surgical treatment of orbital floor and/or medial wall fractures.

Approximately 300 adult patients presenting with a displaced OFx in the orbital floor and/or medial wall will be enrolled prospectively over a recruitment period of ~36 months. All eligible patients treated either surgically or non-surgically as per routine standard of care will have follow-up assessments at 6 weeks, 3 months and 6 months post-treatment. Demographic data, injury details, treatment details and outcome measures will be documented in a cloud-based database. Outcome measures include clinical outcomes (eg, diplopia, extraocular motility, and condition of the eyelid, globe and soft tissues), radiological outcomes from collected images, patient-reported outcomes (eg, Diplopia Questionnaire and the newly developed AO Craniomaxillofacial (CMF) Injury Symptom Battery) and complications. A statistical analysis plan will be prepared before final analysis summarising the descriptive statistics to be used for data assessment. Appropriate research questions and statistical tests may be applied additionally, depending on the availability and quality of data collected.

Ethics approval was obtained before patients were enrolled at each participating site. Patient enrolment followed an informed consent process approved by the responsible ethics committee. Peer-reviewed publications are planned to disseminate the study results.

NCT03887988.

Guidelines for symptomatic knee osteoarthritis (OA) dictate the initiation of conservative treatment (physical therapy, analgesics and intra-articular injections with corticosteroids) as a first line defence. When conservative treatment fails, the golden standard is invasive joint replacement surgery, but for a substantial group of patients who do not respond to the current conservative treatment, this is not (yet) indicated. The RADIOPHENOL study investigates if denervation of knee sensory (genicular) nerves can serve the gap between conservative and invasive treatment for younger patients and for patients who cannot undergo joint replacement surgery due to comorbid health conditions.

The RADIOPHENOL study is a multicentre unblinded randomised controlled trial with three parallel arms (1:1:1). In total, 192 patients with knee OA Kellgren-Lawrence grades 2–4 but not eligible for joint replacement according to the orthopaedic surgeon due to young age, old age and/or comorbidity or technical reasons are eligible and will be randomised to three groups of 64 patients. Group A: traditional radiofrequency ablation, group B: chemical neurolysis with phenol, group C: conservative medical management. Primary outcome is the Oxford Knee Score at 6 months. Secondary outcomes include Western Ontario and McMaster Universities Osteoarthritis Index, knee pain by numeric rating scale, physical functionality, health-related quality of life, mental health, change in medication use, predictive value of a diagnostic block, procedure time, patient discomfort score during the intervention and adverse events.

The protocol (V.2.0, 15 May 2023), was approved by the Ethics Committee of Amsterdam UMC (NL83410.018.22 – METC2022.0890) on 31 July 2023. We aim to publish our results in international peer-reviewed journals.

ClinicalTrials.gov NCT06094660, including the WHO Trial Registration data set items. Registered on 20 October 2023, first patient enrolled on 27 November 2023.