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An overlooked source of skin dose perturbation: Commercial tattoo inks in radiotherapy

by Hongjun Park, Beechui Koo, Jungwook Shin, Byoung Hyuck Kim, James J. Sohn

Approximately one-third of US adults have tattoos, yet the dosimetric impact of intradermal tattoo pigments during radiation therapy remains uncharacterized. Commercial tattoo inks contain unregulated metallic impurities including chromium, lead, and nickel, raising concerns about dose perturbations in tattooed skin. This work quantifies radiation dose perturbations induced by high-atomic-number (Z) tattoo pigments under clinically relevant radiotherapy conditions. Monte Carlo simulations (TOPAS) modeled layered skin phantoms with a 0.3-mm intradermal tattoo layer embedded at 1.25–1.55 mm depth. Three commercial inks were evaluated: carbon-based (black) and metal-containing (Fe-rich brown, Al-containing orange) at pigment loadings of 5–100 vol% within the tattoo layer, to establish upper-bound effects. Electron (6, 18 MeV) and photon (6, 18 MV) beams were simulated with standard clinical geometry (1 × 1 cm² field, SSD = 100 cm). Photon irradiation produced pronounced, depth-localized dose enhancement, with peak dose enhancement factor (DEF) reaching 2.5 for brown ink at 18 MV, a 62% mean increase relative to non-tattooed skin driven by high-Z–mediated secondary electron production. Electron beams exhibited energy-dependent behavior: 6 MeV produced modest enhancement (peak DEF ~ 1.07), while 18 MeV unexpectedly generated dose deficits (DEF 

Comparing response rates between mobile web and telephone surveys for patient experience: a randomised experimental study in South Korea

Por: Koo · B. M. · Song · Y. · Choi · Y.-G. · Jo · M.-W. · Lee · Y. · Han · S. Y. · Kim · S. K. · Do · Y. K.
Objective

Healthcare quality improvement increasingly relies on patient experience data, yet traditional survey modes face declining response rates and rising costs. Mobile web surveys have emerged as a promising alternative for improving response rates. The primary aim of this study was to investigate the effectiveness of mobile web surveys in improving response rates in South Korea’s Patient Experience Assessment. We also aimed to assess the impact of a mixed-mode approach integrating mobile web and follow-up telephone surveys across different demographic groups.

Design

A randomised experimental design was employed to compare response rates as well as contact and cooperation rates among survey modes. A total of 4800 patients from four general hospitals were randomly allocated to telephone, mobile web or mixed-mode survey, with 1600 patients per mode. Each mode allowed five contact attempts through calls or mobile survey links. The mixed-mode survey included follow-up calls for mobile non-respondents.

Setting

The survey was conducted between October and November 2022 among patients discharged from four general hospitals in South Korea.

Participants

A total of 4800 patients aged 19 years or older who were hospitalised for more than 1 day and discharged within 2–56 days from four general hospitals were included in this study. Exclusion criteria included patients in day clinics, palliative care, paediatrics and neuropsychiatry, as well as those without personal information consent forms during hospital admission.

Primary and secondary outcome measures

The primary outcome measure was the response rate for each survey mode. Secondary outcome measures included the contact rate and the cooperation rate.

Results

The mobile web survey yielded an overall higher response rate (32.5%) than the telephone survey (22.4%), with the mixed-mode survey achieving the highest response rate (39.3%). Decomposing response rates revealed that while contact rates were comparable for both telephone and mobile web surveys, the cooperation rate was considerably higher for the mobile web survey (73.2%) compared with the telephone survey (52.2%). Substantial gender-age subgroup differences were found.

Conclusions

Adopting mobile web surveys for patient experience assessments, which aligns with the public’s preference for information and communication technologies, could significantly improve response rates in patient experience surveys.

Trial registration number

KCT0011374 (post-results).

Top 10 research priorities for adolescent and young adult cancer in Canada: a James Lind Alliance priority setting partnership

Por: Tutelman · P. R. · Thurston · C. · Ranger · T. · Rader · T. · Henry · B. · Abdelaal · M. · Blue · M. · Buckland · T. W. · Del Gobbo · S. · Dobson · L. · Gallant · E. · Heykoop · C. · Jansen · M. · Larsen · L. · Maseja · N. · Oberoi · S. · Ramasamy · V. · Smith · M. · Wendowsky · N. · Beattie
Objectives

Cancer in adolescents and young adults (AYAs; ages 15–39 years) is a rising global epidemic. Yet, AYAs remain an understudied population, and little is known about what research topics should be prioritised according to those with lived experience. The AYA Cancer Priority Setting Partnership (PSP) was established to identify the top 10 research priorities for AYA cancer in Canada according to patients, caregivers, and clinicians.

Design

This project followed the James Lind Alliance (JLA) Priority Setting Partnership (PSP) methodology that included two national cross-sectional surveys and a final priority setting workshop following an adapted nominal group technique.

Setting

A national sample was recruited to participate from across Canada.

Participants

Participants were patients, caregivers, and clinicians with lived personal and/or professional experience of AYA cancer in Canada.

Outcome measures

In the first survey, open-ended responses were collected from participants about questions they would like answered by research. Responses were collated into overarching summary questions and a literature search was undertaken to verify if questions were true uncertainties and not fully answered by existing evidence. Unanswered questions were ranked by participants in a second survey. The top-ranked questions were prioritised through consensus at the final priority setting workshop. The final outcome was the top 10 priorities for AYA cancer research in Canada.

Results

In the initial survey, 1916 potential research questions were submitted by 275 patients, caregivers, and clinicians. Following data processing, summary question formation, and the evidence check, 58 questions were put forward for interim prioritisation in a second survey (n=285 patients, caregivers, and clinicians). The top 20 questions from the interim prioritisation were ranked at the final priority setting workshop attended by a diverse group of 23 patients, caregivers and clinicians from across Canada. The resulting top 10 priorities reflect topics across the cancer continuum including: diagnostic delays, screening and early detection, novel therapies, psychosocial impacts, end-of-life concerns, and survivorship issues.

Conclusions

This patient-directed research agenda will guide researchers, funding agencies, and policymakers to ensure that future research is aligned with what matters most to the AYA cancer community.

Reduced levels of mitochondrial ribosomal protein <i>MRPL54</i> does not alter Apc related adenoma formation

by Claudia N. Spaan, Eileen Daniels, Wouter L. Smit, Ruben J. de Boer, Joana Silva, Jacqueline L. M. Vermeulen, S. Meisner, Vanesa Muncan, Riekelt H. Houtkooper, Jarom Heijmans

Reprogramming of energy metabolism is one of the hallmarks of cancer cells and mutations that modify wild type intestinal cells to colon carcinomas increases cellular energy expenditure. Mitochondria are the main site for ATP production in (cancer) cells and disrupting their function results in impaired tumor forming efficacy. The mitochondrial ribosomal proteins (MRPs) constitute the ribosome specifically in mitochondria, and as such are crucial for the translation process of the electron transport chain complex subunits. We hence aimed to explore the consequence of reduced MRP expression on adenomagensis and investigate this in a genetic mouse model with bodywide heterozygosity for Mrpl54. We show that Mrpl54 heterozygosity does not alter adenoma formation, intestinal proliferation or apoptosis in a heterozygous Apc model. Furthermore, diminished Mrpl54 expression did not decrease stemness or global parameters of metabolism in colorectal cancer cell lines.

Antibiotic use among patients admitted to tertiary hospitals in Uganda: a trend analysis of 2020-2023 point prevalence surveys

Por: Nakasendwa · S. · Mayito · J. · Twemanye · V. · Tumwine · C. · Kiggundu · R. · Galiwango · R. · Nuwamanya · E. · Muleme · J. · Dhikusooka · F. · Mwanja · H. · Twinomuhwezi · E. · Akello · H. · Seru · M. · Mackline · H. · Byonanebye · D. M. · Kakooza · F. · Kambugu · A.
Objective

Limited data exist on temporal changes in antibiotic use in low and middle-income countries. We evaluated trends in antibiotic use at tertiary hospitals in Uganda.

Design

Retrospective trend analysis of a repeated point prevalence survey (PPS).

Setting and participants

This study utilised antibiotic use data from quarterly PPS conducted among inpatients at nine regional referral hospitals in Uganda between October 2020 and December 2023.

Outcome measures

We determined the proportions of antibiotic use, prescriptions guided by culture and sensitivity tests (CST), WHO AWaRe (Access, Watch and Reserve) categories, and prescriptions without documented indication. Linear regression was used to derive slope coefficients and 95% confidence interval (CI).

Results

Of 15,154 patients surveyed, 8,892 (58.7%) received systemic antibiotics. The median age was 23 years (IQR: 11–38), 5,338 (60.5%) were female, and 4,583 (51.5%) were on treatment for infectious syndromes, including sepsis (1,400, 15.7%) and pneumonia (867, 9.8%). The drug utilisation index (DU75) consisted of ceftriaxone, metronidazole, gentamicin and ampicillin, which accounted for 76.9% (12,291/15,989) of total antibiotic use. The distribution of prescribed antibiotics was 46.6% Access, 45.5% Watch, 0.1% Reserve and 7.7% unrecommended combinations. Overall, 5,402 (60.8%) prescriptions were aligned with national guidelines, 2,147 (24.1%) prescriptions were issued without an indication, and CST guided 271 (3%) prescriptions. Over time, there was no significant change in antibiotic prescription prevalence (slope=0.09, CI –0.93 to 1.10) and prescriptions without indication (slope=–0.70, CI –1.79 to 3.98). However, adherence to treatment guidelines (slope=2.06, CI 0.14 to 3.98) and prescriptions based on CST results (slope=0.62, CI 0.12 to 1.13) significantly increased, while ‘Watch’ antibiotics prescriptions decreased (slope=–0.40, CI –0.63 to –0.17).

Conclusions

The antibiotic prescription rate remained high, with no significant change over time. Improvements were seen in adherence to treatment guidelines, use of CST and reduced use of ‘Watch’ antibiotics. Strengthening antibiotic stewardship is recommended to further improve practices.

Barriers to integrating evidence-based practices into intrapartum care during vaginal births: a descriptive qualitative study in Sri Lanka

Por: Weerasingha · T. K. · Ratnayake · C. · Rathnayake · A. · Tennakoon · S. U. B.
Objectives

This study intended to investigate barriers to implementing evidence-based intrapartum care during vaginal births, from maternity care providers’ point of view.

Design

A descriptive qualitative study was conducted using in-depth interviews, with data analysed through thematic analysis.

Setting

The labour room of a major tertiary care hospital in Central Sri Lanka.

Participants

Purposively selected 17 maternity care providers including doctors, nurse managers, nurse-midwives and midwives.

Results

Three major themes and twelve sub-themes were generated: (1) barriers related to care providers (lack of human resources, negative attitudes of care providers, poor relationship among care providers, poor relationship between women and care providers, lack of knowledge on evidence-based practice in childbirth care); (2) barriers related to organisational environment (gaps in management, heavy workload, inadequate physical resources, insufficient in-service training and lack of availability/use of updated guidelines) and (3) barriers related to women’s birth preparedness (women’s limited knowledge on childbirth and intrapartum practices and women’s limited engagement during labour and childbirth). Many maternity care providers perceived that prevailing challenges to implement evidence-based childbirth care were one of the major reasons that impacted the quality of current childbirth care in the labour room.

Conclusions

The findings showed that an integrative approach may be essential to address the diverse barriers to the implementation of evidence-based intrapartum care. It is necessary to engage healthcare administrators, healthcare professionals and care recipients to enhance the quality of current childbirth care in the setting through the successful implementation of evidence-based care.

Determinants for the implementation of a combined lifestyle intervention for patients with knee osteoarthritis and overweight: a qualitative study

Por: Gharbaran · P. · Jansen · N. E. · Merkelbach · I. · van Middelkoop · M. · Schiphof · D.
Objectives

Lifestyle changes—such as adopting healthy nutrition and increasing physical activity—are essential for alleviating symptoms in patients with knee osteoarthritis (OA) and overweight, with weight loss being a key outcome of these changes. Since 2019, healthcare professionals (HCPs) in the Netherlands have been able to refer these patients to a reimbursed combined lifestyle intervention (CLI). This study aims to identify determinants affecting CLI implementation for individuals with knee OA and overweight from both patient and HCP perspectives.

Design

Semistructured interviews were conducted in a qualitative study with 23 individuals with knee OA and overweight and 16 HCPs (general practitioners (GPs) and lifestyle coaches). Interviews were transcribed verbatim and coded independently by two researchers using the updated Consolidated Framework for Implementation Research (CFIR).

Setting

Primary care, including GPs and lifestyle coaches from the Greater Rotterdam region in the Netherlands.

Participants

23 individuals with knee OA and overweight and 16 HCPs (GPs and lifestyle coaches).

Results

Determinants were explored within four CFIR domains: innovation, outer setting, inner setting and individuals. Key facilitators included recognition of the programme’s potential, strong social support and positive participant–coach relationships. Major barriers involved the absence of an exercise component, financial constraints limiting its inclusion, scepticism among GPs about care quality, limited expertise of lifestyle coaches addressing OA-specific needs and difficulties adapting the programme to participants’ diverse knowledge levels and health literacy.

Conclusions

To improve the implementation of the CLI for patients with knee OA, it is essential to incorporate a tailored exercise component, strengthen lifestyle coaches’ expertise, address financial barriers and build trust among GPs through education and clear communication of programme outcomes. Tailoring the CLI to better meet participant needs is crucial to ensure its long-term effectiveness and sustainability as a treatment for individuals with knee OA and overweight.

Trial registeration number

Netherlands Trial Registry (NL9355).

Introducing an integrated maternity care pathway for women with a history of small-for-gestational-age: Evaluation of its effect on care process and clinical outcomes

by Anne C. M. Hermans, Julia Spaan, Marieke A.A. Hermus, Amber M. Hietkamp, Jantien Visser, Arie Franx, Jacoba van der Kooy

Introduction

This study focusses on the implementation of an integrated care pathway for women with SGA in their obstetric history that pursues value-based healthcare. This study aims to 1) Determine whether the integrated care pathway led to a reduction in the number of antenatal secondary care consultations, as an indicator of care efficacy, and 2) compare clinical outcomes for women with a history of SGA before and after implementation of the integrated care pathway.

Methods

Retrospective cohort study including data from pregnant women with a history of SGA within integrated maternity care organisation Annature, 2017–2020. Intervention was an integrated care pathway (2018). Pre- and post-intervention periods were compared assessing prenatal secondary care consultations, place and mode of delivery, and perinatal outcomes.

Results

The implementation of the care pathway for pregnant women with a history of SGA led to a reduction in mean number of prenatal secondary care consultations per pregnancy from 11 in 2017–5 in 2020, and fewer inductions of labour (78 (34.2%) vs 127 (26.8%), p = 0.045). Additionally, the number of births in primary care increased (35 (15.4%) vs 136 (28.8%), p  Conclusion

The implementation of the care pathway for pregnant women with a history of SGA resulted in a reduction in prenatal secondary care consultations and fewer inductions of labour. Additionally, the number of births in primary care increased, with no significant adverse impact on neonatal outcomes in the post-intervention period compared to the pre-intervention period.

Understanding acute vertigo in emergency care in a large London teaching hospital: patient and physician perspectives on diagnostic challenges and digital support

Por: Cortese · E. · Ramsay · A. I. G. · Koohi · N. · Kaski · D.
Background

Acute vertigo is a common but diagnostically challenging presentation in emergency departments (EDs), where rapid distinction of life-threatening conditions—like stroke—is critical. Patient and clinician perspectives are often overlooked, and real ED needs and possibilities remain poorly understood. While smartphone-based clinical decision support tools (CDSTs) show promise, evidence on required features for trust and adoption is limited. The UK’s 2025 10-Year Health Plan highlights digital innovation and AI in urgent care, underscoring the need to address these gaps.

Objective

To explore the experiences of emergency physicians and patients with acute vertigo during the diagnostic process; identify real-world challenges, needs and opportunities within the ED setting; and assess participants’ perceptions of the acceptability of implementing a smartphone-based decision-support tool (CDST) to aid in acute vertigo diagnosis.

Design

Qualitative study using semi-structured interviews and reflexive thematic analysis.

Setting

Emergency Department of University College London Hospitals NHS Foundation Trust (UCLH), UK.

Participants

10 emergency physicians with experience in managing acute vertigo and 10 patients who had recently presented to the ED with symptoms of acute vertigo.

Results

The analyses identified challenges and needs when diagnosing acute vertigo in the ED and participants’ views on future smartphone-based CDST development to assist the diagnostic process. Clinicians emphasised diagnostic complexity, limited training and system-level constraints—like lack of space, time and resources—as major challenges. Patients emphasised the need for better communication and clearer diagnostic pathways. Both groups saw potential in smartphone-based CDSTs to improve diagnostic efficiency and accuracy by offering structured assessments and helping clinicians identify serious conditions.

Conclusions

This study offers insights into real-world constraints of diagnosing acute vertigo in the ED. Findings suggest that aligning CDST design with clinical workflows, user trust and environmental realities may facilitate adoption and impact in emergency care settings.

Sex differences in the efficacy, safety and persistence of tofacitinib in patients with rheumatoid arthritis: a post hoc analysis of phase III and long-term extension trials

Por: Strand · V. · Schulze-Koops · H. · Al-Emadi · S. · Kinch · C. D. · Gruben · D. · Germino · R. · Connell · C. A. · Mysler · E.
Objectives

Evaluate tofacitinib efficacy, safety and persistence by sex in rheumatoid arthritis (RA).

Design

Post hoc analyses using data from phase III placebo-controlled randomised controlled trials (ORAL Scan, ORAL Sync and ORAL Standard).

Setting

ORAL Scan, ORAL Sync and ORAL Standard were global, multicentre trials conducted across 111, 114 and 115 sites, respectively.

Participants

The trials enrolled adults with active RA and prior inadequate response to methotrexate (ORAL Scan/ORAL Standard) or ≥1 conventional synthetic or biologic disease-modifying antirheumatic drug (ORAL Sync). Post hoc analyses included 2265 patients (1870 female and 395 male).

Interventions

Patients received tofacitinib 5 mg or 10 mg two times a day, adalimumab or placebo.

Outcome measures

Efficacy outcomes to month 12 included American College of Rheumatology (ACR)20, 50 and 70 responses, Disease Activity Score in 28 joints (DAS28) (erythrocyte sedimentation rate (ESR))-defined low disease activity (LDA) and remission, DAS28 (C reactive protein (CRP)) ≤3.2 and

Results

At baseline, female patients had similar DAS28(CRP and ESR), slightly higher HAQ-DI and lower FACIT-F scores versus male patients (n=395). ORs for active treatments (tofacitinib and adalimumab) versus placebo were generally >1 for ACR20, 50 and 70 responses, DAS28(CRP) ≤3.2 and

Conclusions

In post hoc analyses, tofacitinib was efficacious across both sexes, with higher responses in males observed particularly for more stringent composite endpoints and patient-reported outcomes. Findings are generally consistent with studies of other advanced RA therapies. Safety and persistence were similar across sexes. Interpretation is limited by the small proportion of male patients (

Trial registration number

NCT00847613, NCT00856544, NCT00853385, NCT00661661 and NCT00413699.

Scoping review mapping the implementation and adaptation of life skills training programmes for individuals with schizophrenia spectrum disorder: contexts, frameworks, interventions and outcomes

Por: Nitayawan · S. · Leamy · M. C. · Inta · N. · Bhatarasakoon · P.
Objective

To map the implementation and adaptation of life skills training programmes for individuals with schizophrenia spectrum disorder across diverse settings, identifying frameworks, intervention components, outcomes and implementation strategies.

Design

A scoping review following Arksey and O’Malley’s methodology and Preferred Reporting Items for Systematic Reviews extension for Scoping Reviews reporting guidelines.

Data sources

Six electronic databases (MEDLINE (Ovid), PubMed (National Library of Medicine), PsycINFO (APA PsycNET), CINAHL (EBSCO), ThaiJo (Thai Journals Online) and TCI-Thailand (Thai-Journal Citation Index) were searched from 1970 to 10 December 2024, supplemented by handsearching reference lists and relevant organisational websites.

Eligibility criteria

Primary studies targeting life skills training for adults with schizophrenia spectrum disorder, including at least three life skills components (medication management, social skills, communication, organisation/planning, transportation, financial management) and providing intervention details.

Data extraction and synthesis

Data were extracted using the Template for Intervention Description and Replication checklist. Outcomes were analysed using Kirkpatrick’s four-level training evaluation framework. Implementation adaptation, barriers and enablers were identified through narrative synthesis.

Results

33 studies from 7 countries (France, Italy, Spain, Canada, USA, Turkey and China) met inclusion criteria. Three major programme frameworks emerged: University of California, Los Angeles Social and Independent Living Skills Programme, Functional Adaptation Skills Training and Cognitive-Behavioural Social Skills Training. Cultural adaptations were crucial for implementation success, with programmes demonstrating adaptability across diverse settings while maintaining core therapeutic components. Implementation barriers included cognitive deficits, transportation difficulties and workforce limitations; enablers included structured formats, diverse teaching methods and family involvement. Most studies showed positive behavioural changes, but only one-third reported broader systemic outcomes.

Conclusions

Life skills training programmes had been reported to be implemented across diverse settings when appropriately adapted to cultural contexts and resource constraints. Most programmes combine structured learning with real-world practice, accommodate cognitive limitations through diverse teaching methods and engage families in the intervention process. Future research should focus on implementation strategies enhancing skill generalisation, addressing resource limitations in low-income and middle-income countries, and evaluating longer-term outcomes.

Cervical high-risk human papillomavirus infection and its associated risk factors: a community-based cross-sectional study in hard-to-reach areas in Bangladesh

Por: Nazrul · N. · Rahman · A. · de Fouw · M. · Campbell · C. · Koot · J. · Kulsum · M. U. · Ahmed · M. S. · Haider · S. S. · Hossain · M. A. · Islam · K. M. · Nessa · A. · Amrin · M. · Stekelenburg · J. · Beltman · J. J.
Objectives

This study aimed to determine the prevalence of cervical high-risk human papillomavirus (hrHPV) in a community-based setting and its risk factors association in women living in hard-to-reach areas in Bangladesh.

Design

A cross-sectional study

Setting

The study was carried out in six subdistricts, located in hard-to-reach and climate-impacted regions of Bangladesh.

Participants

A total of 8000 married women aged 30–60 years were invited for screening. Women who were unable to give consent, were pregnant or had a hysterectomy with removal of the cervix, previous screening less than 5 years, or treatment of the cervix or had symptoms of potential cervical cancer were excluded.

Interventions

A community-based hrHPV self-collected screening for cervical cancer was conducted from June 2022 to July 2023.

Main outcome measures

Prevalence of cervical hrHPV and risk factor association.

Results

11 127 women were eligible for screening; 7850 women submitted hrHPV self-swabs, 7828 valid HPV test results were reported and 164 women (2.1%) tested hrHPV positive. Women living in the North were 2.1 times more likely to be hrHPV positive compared with women living in the South (adjusted OR (AOR)=2.1, 95% CI: 1.5 to 3.8, p=0.023) and widowed women were 3.0 times more likely to be hrHPV positive than married women (AOR=3.0, 95% CI: 1.7 to 5.3, p=0.001). Another risk factor associated with testing hrHPV positive was the use of hormonal contraceptives for 5 years and above (AOR=7.0, 95% CI: 2.0 to 24.4, p=0.002).

Conclusion

The study identified a low overall prevalence of hrHPV infection (2.1%) among women in hard-to-reach areas in Bangladesh, with some regional variations. Higher prevalence was observed in widowed compared with married women and among women reporting more than 5 years of hormonal contraceptive use. This study shows no evidence of particularly high-risk groups in hard-to-reach areas in Bangladesh. The findings support the feasibility of implementing a nationwide hr-HPV-based self-sampling strategy as a viable approach to reach WHO targets for reducing the burden of cervical cancer. Recommendation for policymakers to support future research to identify hrHPV prevalence among women in comparable groups in other geographically remote areas in Bangladesh.

Trial registration number

NCT05234112.

Effect of peri-interventional music on postictal agitation in electroconvulsive therapy patients (MUSE): protocol for an open-label multicentre randomised controlled trial in the Netherlands

Introduction

Postictal agitation (PIA) is a common adverse effect following electroconvulsive therapy (ECT). Current pharmacological treatments for PIA have undesirable side effects, and interventions to prevent PIA are unsatisfactory. The aim of this study is to assess the effect of peri-interventional music on PIA for patients undergoing ECT. Additionally, the study will assess the impact of music on pretreatment anxiety and post-treatment cognitive impairment.

Methods and analysis

This multicentre, open-label, parallel randomised controlled trial (RCT) aims to include 92 patients from two centres in Rotterdam, the Netherlands. Participants will be randomised into two groups: a music intervention group and a control group. The music group listens to recorded music 30 min before and 12 min after each of the first six ECT sessions of the full ECT course, while the control group will receive standard care. The primary outcome is the presence of PIA, measured using the Richmond Agitation-Sedation Scale (RASS). Secondary outcomes include the severity and duration of PIA, pretreatment anxiety, recovery duration, peri-treatment medication requirements, cognitive impairment and depression severity. Data will be analysed according to an intention-to-treat principle.

Ethics and dissemination

This study protocol has been approved by the Medical Ethical Review Committee of the Erasmus Medical Centre on 28 January 2025 (MEC-2024–0467) and subsequently received local approval at Antes Parnassia group. The trial will be carried out following the Declaration of Helsinki principles. Study results will be reported in a peer-reviewed journal according to the Consolidated Standards of Reporting Trials guidelines.

Trial registration number

NCT06817330.

Study protocol: MRI-based assessment of cerebral blood flow under pharmacologically elevated blood pressure in patients under general anesthesia, and in sedated ICU patients with aneurysmal subarachnoid hemorrhage

by Jonas Österlind, Johan Birnefeld, Elin Birnefeld, Magnus Hultin, Sara Qvarlander, Anders Wåhlin, Petter Holmlund, Laleh Zarrinkoob

Background

Maintaining cerebral perfusion during anesthesia and intensive care is critical, yet the relationship between mean arterial pressure (MAP) and cerebral blood flow (CBF) remains poorly defined. In patients with aneurysmal subarachnoid hemorrhage (aSAH), pharmacologically induced hypertension is commonly applied to support cerebral perfusion, but its effects are uncertain.

Methods

This protocol describes two parallel clinical studies using identical methodology. The first study population includes adults undergoing elective general anesthesia (MAP-ANE), and the second comprises sedated intensive care patients with aSAH (MAP-SAH). In both study populations, MAP will be increased stepwise with norepinephrine (NE) infusion under continuous invasive blood pressure monitoring, and CBF measured with phase-contrast MRI (PCMRI) and arterial spin labeling (ASL), while near-infrared spectroscopy (NIRS) will be performed in parallel to evaluate its validity as a surrogate marker. The primary outcome is the change in total CBF between baseline and elevated MAP, directly testing whether induced hypertension increases CBF. Secondary outcomes include ASL perfusion changes, the slope of the MAP–CBF relationship, systemic–cerebral hemodynamic correlations, and NIRS responses.

Expected impact

These studies test the hypothesis that pharmacological MAP augmentation does not predictably increase CBF. By combining quantitative MRI with invasive monitoring, it aims to clarify MAP–CBF interactions, define the physiological basis of induced hypertension, and assess whether NIRS can serve as a clinically useful proxy. Findings are expected to inform safer and more individualized blood pressure management in perioperative and neurocritical care. The studies are registered at ClinicalTrials.gov (MAP-ANE: NCT06855407; MAP-SAH: NCT06033378).

Trial registration

ClinicalTrials.gov, MAP-ANE NCT06855407, MAP-SAH NCT06033378

Machine learning-based prediction of dissatisfaction after occupational injury: a retrospective cohort study using the nationwide Korean workers compensation insurance database

Por: Lee · Y. · Kim · T. · Koo · D. · Park · D.
Objectives

To develop a machine learning (ML)-based predictive model to determine the key predictors of dissatisfaction after occupational injury (OI).

Design

A retrospective cohort study.

Setting

Nationwide 5-year panel data (2018–2022) from the Panel Study of Workers’ Compensation Insurance in South Korea.

Participants

A total of 2298 workers who completed compensation-related medical care in 2017.

Methods

Predictive modelling was conducted with extreme gradient (XG) Boost, light gradient boosting machine (GBM), CatBoost and random forest. SHapley Additive Explanations (SHAPs) analysis was conducted to interpret the feature importance. Further, logistic regression was conducted for comparison.

Primary outcome measures

This study evaluated postinjury satisfaction among workers using survey items associated with satisfaction levels. We adopted a 5-year follow-up period.

Results

Of the 2298 participants, 570 were dissatisfied. The logistic regression model indicated that dissatisfaction was significantly associated with unemployment (adjusted OR (aOR) 1.701; 95% CI: 1.296 to 2.233), lack of private health insurance (aOR 1.347; 95% CI 1.042 to 1.741) and lower perceived socioeconomic status (aOR 2.097; 95% CI 1.109 to 3.965). Among the ML models, light GBM exhibited the highest area under the receiver operating characteristics curve (0.770 (95% CI 0.718 to 0.819)), followed by CatBoost (0.768 (95% CI 0.718 to 0.815)), random forest (0.766 (95% CI 0.715 to 0.814)) and XGBoost (0.765 (95% CI 0.717 to 0.811)). The SHAP analysis demonstrated the total number of household members, extent of pain interference with daily life, perceived health status before injury and financial factors as the strongest predictors.

Conclusion

This study developed and demonstrated robust predictive performance of an ML-based model for determining dissatisfaction after OI. The key features included employment status, financial stability, chronic pain and cognitive function, highlighting the multifaceted nature of worker satisfaction.

Incidence and trends of non-fatal overdoses among people with and without HIV: a population-based cohort study in British Columbia, Canada (2012-2020)

Por: Kooij · K. W. · Marziali · M. · Budu · M. · Trigg · J. · Ye · M. · Zhang · W. · McLinden · T. · Emerson · S. D. · Salters · K. · Martins · S. S. · Montaner · J. · Hogg · R. S.
Objectives

Our study investigated the age-adjusted incidence rates of non-fatal overdoses by HIV status and sex, and examined trends over time.

Design

We used data from the Comparative Outcomes and Service Utilization Trends study, a population-based cohort study that includes clinical and administrative health data on virtually all people with HIV (PWH) and a 10% random sample of people without HIV in the province.

Setting

British Columbia, Canada.

Participants

Between April 2012 and March 2020, 11 050 PWH (81.8% male) and 473 952 people without HIV (50.3% male) who were 19 years and older contributed 68 035 and 3 285 824 person years (PY) of follow-up, respectively.

Outcome measures

The primary outcome was age-adjusted incidence rates of non-fatal overdose events stratified by sex and HIV status. Trends over time were also assessed.

Results

Age-adjusted non-fatal overdose incidence rates among males with and without HIV were 36.4 and 3.12 per 1000 PY, respectively (incidence rate ratio (IRR) = 11.7, 95% CI 10.9 to 12.5). For females with and without HIV, the age-adjusted incidence rates were 61.4 and 2.33 per 1000 PY, respectively (IRR=26.3, 95% CI 24.0 to 28.7). Between 2013 and 2019 (calendar years with full-year data), the age-adjusted non-fatal overdose rate increased significantly among males and females without HIV but not among PWH.

Conclusions

We observed a significantly higher non-fatal overdose rate among PWH compared to people without HIV. The rate was highest among females with HIV. These findings underline the need for policies and programmes oriented towards PWH to mitigate overdoses, especially for females.

The LoaD study: the association between different types of physical activity and the progression of knee osteoarthritis--a cohort study protocol

Por: van der Voort · J. W. · Voogt · L. · Huisken · S. · Oei · E. · van Oeveren · B. · van Meurs · J. · Pluim · B. M. · Bierma-Zeinstra · S. M. A. · van Middelkoop · M.
Background

The global prevalence of osteoarthritis (OA) is expected to rise as the population ages, leading to increased physical impairments that often reduce physical activity. Knee OA, in particular, is a leading cause of chronic pain and disability in people over 40. OA progression varies among individuals, with factors such as higher age and body mass index contributing to a more rapid progression. However, research suggests that engaging in physical activity such as hiking and running may help alleviate pain and slow OA progression. However, current literature on the relationship between physical activity and knee OA is largely retrospective, lacks comparative analyses across different physical activity types and rarely considers the intensity of physical activity. To address these gaps, the LoaD study was designed as a prospective cohort study aimed at examining how different physical activity types (ie, hiking, running, cycling and tennis) and their intensities relate to knee OA progression over 24 months in physically active individuals with early signs of the condition.

Methods and analysis

This prospective cohort study will include 300 participants (75 per physical activity group), who will be followed for 24 months. Eligible participants are aged 45–65, meet the National Institute for Health and Care Excellence (NICE) criteria for clinical knee OA and engage in a minimum weekly activity level for either running (60 min), cycling (120 min), playing tennis (60 min) or hiking (1 hike of 10 km). Baseline and follow-up assessments will include MRI, physical examination (eg, biometrics, lower extremity strength) and blood sampling for molecular biomarker assessment (eg, genetics, inflammatory biomarkers). Participants will receive monthly online questionnaires (eg, demographics, lifestyle, general health, history of knee injuries) and their physical activities will be tracked continuously by global positioning system data from wearable devices. The study’s primary outcomes focus on knee OA progression and symptom changes. These will be assessed through (1) structural progression of knee OA, measured using the MRI Osteoarthritis Knee Score (MOAKS) and (2) clinical symptom progression evaluated by (a) the Knee Injury and Osteoarthritis Outcome Score sport and recreation function subscale and (b) Visual Analogue Scale for pain during an activity nominated by the participant to be the most aggravating for knee pain in the past month (VASNA, 0–10). Differences between groups on the primary outcomes will be analysed using mixed-effects models to determine the impact of activity type and intensity on knee OA progression.

Ethics and dissemination

The study is approved by the Erasmus MC Medical Research and Ethics Committee (MREC) (MEC-2022-0420). The results of this study will be made publicly available through peer-reviewed international open-access scientific journals and national and international conferences. Participants will be informed about the results as soon as they are published.

Development of a practical guide for patient participation in value-based healthcare: an action research study

Objectives

Value-based healthcare (VBHC) strives to improve the healthcare system by focusing on value of care, that is, patient relevant outcomes relative to the costs for achieving these outcomes. Within VBHC, patient participation is crucial to identify patient relevant outcomes and value improvement potential. However, patient participation in VBHC initiatives remains limited. Therefore, we aimed to improve patient participation within VBHC teams with the ultimate aim to develop a practical guide for patient participation in VBHC.

Design

An action research study.

Setting

This study was conducted in seven collaborating Dutch hospitals from March 2023 to November 2024.

Participants

Seven VBHC teams were selected to participate in the cyclical action research steps, that is, orientation, planning, implementation, and evaluation, in which patient participation was implemented or improved. These included the following patient groups: prostate cancer, vulnerable elderly, breast cancer, diabetes, maternity care, colorectal cancer and chronic kidney disease.

Outcomes

Both qualitative and quantitative data were collected. Qualitative data included observations and minutes of meetings with the intervention teams. Quantitative data included responses to the Public and Patient Engagement Evaluation Tool (PPEET) by multiple members of the intervention (n=7) and control teams (n=94) at three time points (T1=6 months, T2=12 months, T3=end of study). Qualitative data were thematically analysed and quantitative data were analysed descriptively. Finally, the data were triangulated to create an overview of lessons learnt in improving patient participation.

Results

Patient participation goals varied across teams, leading to diverse actions, such as establishing a diabetes patient panel and distributing questionnaires to patients with colorectal cancer. PPEET results show that 71% of intervention team members reported that patient participation had an impact on the team’s outcomes compared with 44% in control teams (T3). Furthermore, 80% of the intervention team members initially wanted training in patient participation (T1), which dropped to 29% at T3. Overall, 22 lessons in improving patient participation in multidisciplinary project teams were identified and compiled into a practical guide.

Conclusions

The action research process improved the process and impact of patient participation in the intervention teams. Furthermore, the results indicate that the action research process enhanced the team members’ knowledge and skills on patient participation. The practical guide developed in this study can be used to support implementation of patient participation in VBHC.

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