Chagas disease affects millions of individuals across Latin America and imposes a substantial economic burden on healthcare systems, particularly in rural and underserved regions. Chronic Chagasic cardiomyopathy remains one of the leading causes of heart failure-related mortality in endemic countries. Tissue inhibitor of metalloproteinases-1 (TIMP-1) has emerged as a potential biomarker of myocardial fibrosis in cardiomyopathies. This study was designed to investigate the association between TIMP-1 and myocardial fibrosis in chronic Chagas disease and to assess its potential as an early biomarker of fibrotic remodelling.

Bottom of form: The PTICH trial is a single-centre, prospective observational cohort study conducted at a government reference clinic in Pernambuco, Brazil. The study aims to enrol 210 adults with Chagas heart disease: 140 without ventricular dysfunction (left ventricular ejection fraction (LVEF) ≥52% in women and ≥54% in men) and 70 with ventricular dysfunction (LVEF

The Research Ethics Committee (REC) of Chagas disease and heart failure outpatient clinic—PROCAPE approved the PTICH trial (CAAE number: 65746322.8.1001.5192). Written informed consent has been obtained from all participants enrolled to date, and data handling is in compliance with applicable privacy and data protection regulations. Study findings will be disseminated through targeted outreach to civil society, the scientific community, healthcare professionals and Brazilian Unified Health System (SUS) policymakers; school-based science communication activities conducted in collaboration with state education departments (potentially including oral health educational materials); policy briefs and targeted reports for public health managers; technical meetings and institutional presentations; a plain-language summary published on the institutional website; and submissions to peer-reviewed journals and presentations at academic and health policy conferences.

RBR-3dcrj98.

To explore how individuals with long covid experienced various aspects of a micro-choice-based rehabilitation programme and if these experiences could facilitate behaviour change.

A qualitative study with three focus groups was conducted, in mean 9.8 months after completing the rehabilitation programme. Data were analysed using systematic text condensation.

The study was conducted in a university setting.

19 participants (aged 23–55 years, 15 women) were included between Spring 2021 and Autumn 2022.

The participants in this study had participated in a 3-day concentrated micro-choice-based rehabilitation programme. One of the main features of this intervention was to support participants in shifting their focus from targeting symptoms to choosing alternative actions aimed at improving everyday functioning, referred to as micro-choices.

Five themes were identified: (1) reduction in uncertainty achieved through reassurance and motivation; (2) ‘in the same boat’: sharing experiences and supporting each other; (3) knowledge about the body’s stress responses and micro-choices; (4) shifting between individual practice and close collaboration with the therapists; and (5) sustaining behaviour change is challenging. These themes illustrated how participants’ experiences with different aspects of the rehabilitation programme facilitated both the initiation and maintenance of behaviour change. The participants highlighted the importance of acknowledging their challenges, reducing fear, sharing experiences with peers, feeling understood and supported, collaborating with a skilled team, receiving personalised guidance and gaining insights through the exploration and implementation of micro-choices. Participants also highlighted that behaviour change is an ongoing process requiring sustained effort.

The findings showed how participants experienced various aspects of a concentrated micro-choice-based rehabilitation programme as supportive of behaviour change. The findings indicate that a concentrated rehabilitation programme may facilitate self-management and improve everyday function in individuals with long covid.

NCT05234281.

Since the 1970s, telemedicine has transformed significantly, becoming a critical component of modern healthcare delivery. Over time, technological innovation has increasingly emphasised the integration of the human body with digital systems to develop non-invasive methods for monitoring physiological parameters. Among these technologies, wearable sensors demonstrate substantial potential for continuous patient monitoring. These devices can facilitate real-time data collection, enable more rapid clinical decision-making and promote active patient participation in health management. Such capabilities are particularly valuable in emergency contexts, including prehospital care provided by ambulance services and telephone triage systems. Despite the growing interest in wearable health technologies, their integration into emergency medical services (EMS) remains insufficiently explored and warrants further investigation. We aim to map current research, explore the use of wearables in EMS settings and identify gaps in knowledge regarding their use in EMS.

This scoping review will follow the Joanna Briggs Institute’s (JBI) methodology for scoping reviews. A systematic search of relevant databases (MEDLINE, EMBASE, Cochrane Library, CINAHL, ProQuest and Web of Science) will be conducted, from inception to March 2026. All types of study designs, including quantitative and qualitative studies, will be considered in this scoping review. The inclusion is limited to studies published in English. Two independent reviewers (RA and AA) will conduct a thorough screening of titles and abstracts against the predefined inclusion criteria. Studies that meet the inclusion criteria will be reviewed in full text. Quality and risk of bias will be assessed using the JBI’s critical appraisal tools for the relevant study types. The findings will be presented using diagrams or tables, supplemented by narrative summaries following the JBI guidelines.

Ethical approval is not required. The findings of this study will be disseminated via publication in a peer-reviewed journal.

Open Science Framework (10.17605/OSF.IO/MUEFX).

To assess the levels of knowledge, attitudes and practices (KAP) toward skin cancer prevention among Malaysian adults and to examine differences in KAP across socio-demographic groups.

Cross-sectional online survey.

Community-based study conducted in Malaysia using social media recruitment.

A total of 386 adults aged ≥18 years residing in Malaysia. Most participants were young adults (86.3%), female (55.4%) and of Chinese ethnicity (65.5%). Healthcare professionals were excluded.

Primary outcomes were levels of knowledge, attitude and preventive practices toward skin cancer, measured using the validated KAP-SC-Q (Knowledge, Attitude and Practice of Skin Cancer Questionnaire) and categorised as poor, moderate or good. Secondary outcomes included differences in KAP across socio-demographic and clinical characteristics, analysed using independent t-tests and ² tests.

Over half of participants demonstrated poor knowledge of skin cancer (56.0%) and the vast majority showed inadequate preventive practices (84.2%), while attitudes toward skin cancer were predominantly positive (62.4%). Significant differences in mean KAP scores and categorical levels were observed across several socio-demographic variables. Participants with tertiary education had higher knowledge (14.32 vs 12.61) and attitude scores (20.01 vs 15.95; p

Malaysian adults exhibited limited knowledge and very poor preventive practices toward skin cancer despite generally positive attitudes. These findings highlight substantial gaps between awareness and behaviour and support the need for targeted public health interventions to correct misconceptions, improve risk perception especially in high-risk groups and promote effective ultraviolet protection behaviours.

To assess the prevalence and associated factors of dietary practices among antenatal women in Colombo district, Sri Lanka.

This descriptive cross-sectional study examined dietary practices among antenatal mothers in four Medical Officer of Health areas in Colombo, Sri Lanka. A total of 422 participants were selected using stratified random sampling. Data were collected via a validated Food Frequency Questionnaire and analysed using SPSS V.26. Dietary diversity, food variety and animal-source food consumption were assessed. Poisson regression identified predictors of dietary practices, adjusting for socio-economic and pregnancy-related factors. The statistical significance was set at p

Of the 380 antenatal mothers (mean age: 30.72±3.96 years), most were married (98.2%) with 73.7% living in urban areas. Regarding dietary practices, 64.7% had high dietary diversity, while 35.3% had low diversity. Of the sample, 52.1% had a high food variety score and 64.7% had a high animal-source food score. More than half (64.7%) had appropriate dietary practices. Fruits, vitamin A-rich vegetables and rice were the most consumed foods. Key factors influencing dietary practices included age, religion, education, employment and geographical location.

This study highlights the prevalence and factors influencing dietary practices among antenatal mothers. Although the predominant mothers had fair dietary diversities, a considerable number were found to have poor dietary practices. Better dietary practices were associated with major educational attainment, formal employment status and selected residential areas, while younger age, low educational qualification and housewife status were associated with poorer nutrition. The findings indicate that there is an urgent need for interventions related to nutrition for specific vulnerable groups so that they can improve their maternal nutrition and produce better pregnancy outcomes through education and support programmes.

Clinical trials have produced inconclusive results regarding the optimal glucose range for a patient with sepsis in the intensive care unit (ICU) receiving insulin treatment.

To investigate the optimal glucose range in patients with sepsis in the ICU independent of confounding covariates.

Targeted trial emulation of glucose ranges using causal inference targeted maximum likelihood estimation and longitudinal mixed-effects models combined with survival models.

Single-centre, academic referral hospital in Boston, Massachusetts, USA.

Adults fulfilling sepsis 3 criteria with at least three glucose readings and insulin treatment from the Medical Information Mart for Intensive Care (MIMIC)-IV database (2008–2019).

Five predefined glucose distributions with means at 100, 130, 160 (baseline), 190 and 220 mg/dL mimicking current guidelines’ recommendations (140–180 mg/dL).

The primary outcome was in-hospital mortality. Modified counterfactual treatment-policy risks across distinct time-weighted glucose ranges were estimated.

Of 73 181 eligible patients, 8002 patients with a median age of 66 years (41% women, 67% white ethnicity, 57% diabetes) were included. There was a U-shaped curve between glucose range and mortality in patients without diabetes, but overall, this association was not significant (mean glucose at 100 mg/dL with 21% mortality and mean glucose at 220 mg/dL with 26% mortality, p-for-trend 0.26). Mortality was lowest at 17%, with mean glucose between 130 and 160 mg/dL. Hypoglycaemic events (

Our data suggest a U-shaped association of glucose and mortality with an optimal average glucose between 160 and 190 mg/dL. These results confirm current guideline recommendations. Together with recent results from randomised controlled trials, intensivists should aim for a liberal glucose range in most patients.

Few artificial intelligence (AI) clinical decision support systems (CDSSs) are ever evaluated in practice. Although some signal of clinical effectiveness may be needed to justify AI deployment and testing, such data are typically unavailable in early-stage research. This conundrum is especially relevant in the intensive care unit (ICU), where conditions like sepsis and acute respiratory distress syndrome (ARDS) require high-stakes decisions. Our group developed the AI ventilator assistant (AVA), a novel AI CDSS for patients with sepsis ARDS receiving invasive mechanical ventilation. But the promising results of predictive performance estimates are not sufficient to assess AVA’s clinical safety and appropriateness prior to future evaluation and deployment. Therefore, we propose a Clinician Turing Test as a novel validation approach to determine whether clinicians can distinguish AVA-generated treatment recommendations from those enacted by real human clinicians. If AVA’s recommendations are consistently indistinguishable from those of real clinicians, thereby ‘passing’ this Turing test, this would provide a strong preclinical signal of safety and appropriateness.

This multisite, randomised, electronic, vignette-based Phase 1b study will use a Clinician Turing Test design. We aim to recruit 350 critical care clinicians, including physicians and advanced practice providers from six US hospitals. Participants will review nine clinical vignettes of patients with sepsis and ARDS derived from the Molecular Epidemiology of Severe Sepsis in the ICU cohort and an associated profile of a suggested treatment plan. For each participant–vignette combination, the source of the treatment profile will be randomly assigned (AI-generated by AVA vs the actually enacted treatment from real human clinicians) in a 1:1 allocation. The primary endpoint is the participants’ accuracy in identifying whether a treatment profile was AI-generated or human-generated, assessed using equivalence testing through a mixed-effects logistic regression model with random effects for participants and vignettes. Secondarily, a fitted binary classifier will assess discrimination ability using the C-statistic. Secondary endpoints include clinicians’ perceptions of the safety and appropriateness of the treatment profiles, confidence in distinguishing AI-generated and human-generated recommendations, interest in AI CDSSs for sepsis and ventilator management and the time to complete the survey. This novel Phase 1b design provides preliminary but essential information about an AI CDSS’s clinical appropriateness without the risk or cost of actual deployment, thereby informing decisions about future clinical implementation and evaluation in real clinical environments.

This protocol was approved by the Institutional Review Board of the University of Pennsylvania (Protocol #858201). Results are expected in 2026 and will be submitted for publication in peer-reviewed journals and presented at scientific conferences.

NCT07025096.

Post-COVID syndrome manifests with a diverse array of symptoms for which no standard care plan currently exists. Many questions were raised by patients, which underscored the need for a validated patient-reported outcome measure (PROM). Therefore, a post-COVID module was developed to be included in the Assessment of Burden of Chronic Conditions (ABCC-) tool. The ABCC-tool evaluates and visualises the perceived physical, emotional and social burden of one or multiple chronic disease(s) using a balloon diagram and aims to facilitate person-centred care and structured discussions between patients and healthcare professionals. This study explores the patients’ perspective on the content of the ABCC-tool for post-COVID and the tool’s usability in a home-based setting.

All patients who completed the ABCC-tool for post-COVID were invited for an online semi-structured interview. We selected post-COVID patients who had used the tool in the past three months. Interviews were audio recorded and analysed using a thematic approach with Atlas.ti version 23.

Nineteen post-COVID patients (10 males, mean age 56) were interviewed between May and August 2024. The tool was regarded as user-friendly, and patients indicated they would use the tool again in the future. Patients valued the tool’s broad range of topics, some of which are often overlooked in standard healthcare consultations. The tool was comprehensible and relevant according to all patients. The balloon diagram was easy to understand, but a legend explaining the colours of the balloons was preferred. Other suggestions for improvement included adding open-text fields and periodic reminders to increase usability and adding long-term data.

The ABCC-tool is a promising instrument for post-COVID patients, offering a structured way to monitor and communicate experienced burden in addition to standard healthcare consultations. Refinements addressing usability and comprehensiveness are recommended to facilitate its integration into clinical practices.

To investigate the attitudes of physicians towards addressing environmental sustainability in patient conversations, and to identify barriers and facilitators to doing so.

A qualitative, nation-wide study was conducted using semi-structured online focus groups and interviews. Reflexive thematic analysis was used to analyse transcripts, guided by the Theoretical Domains Framework.

Secondary and tertiary healthcare institutions in the Netherlands.

Participants were medical specialists and residents in obstetrics and gynaecology (OB-GYN physicians) in the Netherlands. Participants were purposefully identified to capture diverse demographics and practice settings.

Physicians’ attitudes towards discussing the environmental impact of healthcare and the health effects of environmental pollution with patients. Themes were identified and categorised using the Theoretical Domains Framework.

The study included 28 OB-GYN physicians working across 23 healthcare institutions in the Netherlands. Six themes were developed: (1) strong sense of urgency to reduce healthcare's environmental impact, (2) knowledge gaps impair communication about environmental impact to patients, (3) prioritisation of individual patient health over environmental concerns in decision-making, (4) perceived lack of patient interest in environmental outcomes, (5) system-level support facilitates discussions about environmental sustainability with patients and (6) limited perceived value in discussing the health effects of environmental pollution and climate change with patients.

OB-GYN physicians are supportive of discussing the environmental impact of healthcare services when clinically appropriate. Addressing knowledge gaps, providing evidence-based guidance and embedding sustainability into clinical guidelines and decision aids may facilitate the integration of environmental sustainability into patient-provider interactions.

Photobiomodulation (PBM) has shown promising effects in managing postoperative pain following conventional periapical surgery, although current evidence remains limited. This study aims to assess the effect of PBM on postoperative pain 24 hours after periapical surgery.

A randomised, controlled, double-blind trial will include 34 patients undergoing periapical surgery in the maxillary region, randomly assigned to an experimental group (n=17) or control group (n=17). The experimental group will receive PBM (GaAlAs diode laser, 808 nm, 100 mW, 4 J/cm², applied at five vestibular points) and placebo ibuprofen immediately and 24 hours postoperatively. The control group will receive simulated PBM and active ibuprofen. The primary outcome is postoperative pain assessed by the visual analogue scale at 24 hours. Secondary outcomes include pain at the seventh day, paracetamol intake, oedema, ecchymosis, soft tissue status and temperature at 24 hours and 7 days. Radiographic evaluation of healing will be performed at 1 and 3 months. Statistical analysis will be conducted based on data distribution, using repeated measures ANOVA (Analysis of Variance) or non-parametric equivalents for longitudinal outcomes, and appropriate tests for categorical variables. Significance will be set at p

The study was approved by the Human Research Ethics Committee of Universidad Católica del Uruguay (process no. 220914). Results will be disseminated to participants, healthcare professionals, the public and scientific communities.

NCT05935306.

Physical activity improves physical and psychosocial outcomes in healthy children and in children with a range of chronic health conditions. Unfortunately, children with chronic health conditions have lower levels of physical activity compared to their healthy peers due to multiple restrictions in physical activities and therefore tend to have lower levels of physical activity compared with their peers. This paper describes the protocol for Move to Improve, a pragmatic trial of an individualised physical activity intervention for children with chronic health conditions.

Using the RE-AIM framework, this study aims to test the feasibility of Move to Improve, an 8-week hospital-based individualised physical activity intervention. We will recruit 100 children aged 5–17 years who are diagnosed with type 1 diabetes, cancer, postburn injuries and cerebral palsy to a single-arm, pragmatic feasibility trial. The primary outcomes (objective moderate to vigorous physical activity, quality of life and goal attainment) and secondary outcomes (including aerobic capacity, body composition, motor function, grip strength and psychosocial outcomes) will be assessed at baseline, post intervention and at 6-month and 12-month follow-ups. We will conduct semistructured interviews with participants and their primary caregiver at a 2-month follow-up to capture aspects of feasibility. Quantitative data will be reported descriptively, and qualitative data will be analysed using thematic analysis. Data gathered from this study will inform service decision-making and future trials.

The study has received ethics approval from the Government of Western Australia Child and Adolescent Health Service Human Research Ethics Committee (RGS6677). Findings of this research will be communicated to the public through peer-reviewed publications, conference presentations, reports, infographics and information sheets. Modifications to the protocol will be outlined in the trial registry and journal publications. Authorship will be in accordance with the International Committee of Medical Journal Editors.

Australian and New Zealand Clinical Trials Registry Number: ACTRN12624000836538.

To describe the features and rates of emergency department (ED) presentations identified as related to violence against women (VAW) and of confirmed cases of family domestic violence (FDV) inpatient admissions and to compare these across geographic locations in New South Wales (NSW) Australia.

A retrospective data linkage study.

Routinely collected public hospital data from approximately 180 designated public hospital EDs in NSW, Australia.

Cases were included if female, aged ≥15 years, presenting to any NSW ED between 2015 and 2022 and with one or more criteria indicating VAW, leading to 21 219 cases being included.

The age-standardised rate of VAW ED presentations per year and confirmed FDV inpatient admissions within metropolitan and non-metropolitan areas in NSW, Australia.

Women presenting with VAW were more likely to be aged 25–44 years (n=9705, 45.7%), with almost 20% of presentations from women who identified as Indigenous (n=4153, 19.6%). Indigenous presentations were greater in non-metropolitan areas (n=2675, 30.9%) compared with metropolitan areas (n=1478, 11.8%). Indigenous women in NSW represent only 4.2% of the estimated residential population. VAW presentation rates by age group varied over time, a gradual increase being seen in the 65–84 year-old age group who experienced 45 VAW presentations per year in 2015 to 79 presentations per year in 2022 with an annual rate of change of 7.3%.

VAW accounts for a substantial burden of ED presentations across NSW; the greatest impact on women aged 25–44 years and Indigenous women, particularly in non-metropolitan areas. Rising presentations among older women further highlight the need for strengthened ED screening and referral pathways and for targeted resource allocation to address inequities in family, domestic and sexual violence.

Social determinants of health (SDOH) factors are known to influence patient outcomes, but their effect on sepsis remains insufficiently studied. This research aims to investigate the relationship between SDOH factors and sepsis outcomes, highlighting opportunities to reduce health disparities and enhance patient care.

Retrospective study.

Level I trauma centre in Baton Rouge, Louisiana, USA.

Patients with sepsis aged 18–89 years. Patients discharged or transferred to hospice were excluded to prevent bias and misinterpretation of the findings.

Social Vulnerability Index (SVI), the Gini Index and the average distance to the nearest urgent care, emergency department and clinic.

In-hospital mortality, 30-day readmission and hospital length of stay (LOS).

² tests, Mann-Whitney U tests and Cox regression.

Distance from urgent care is significantly associated with mortality (4.14 vs 3.24 miles, p

Mortality and LOS are closely linked to proximity to urgent care, while high SVI is notably associated with longer LOS. These findings highlight the significant impact of SDOH factors on sepsis outcomes and underscore the need for targeted interventions to address disparities in healthcare access and contextual health practices.

This study aimed to examine how older adults form beliefs about their memory and how these beliefs are influenced by their level of concern about dementia. Inaccurate beliefs and excessive worrying, indicative of erroneous metacognition, are associated with negative health outcomes. This research can help identify mitigation for these harmful effects.

Qualitative focus groups; thematic analysis.

Focus group discussion with healthy older adults hosted at a university in central London.

35 healthy older individuals (women=29) without any psychiatric or neurological diagnoses, over the age of 65 years (mean 75.31, SD: 6.15). 13 participants were identified as having a high level of worry about dementia and 22 as having low worry. Groups were matched for cognitive performance on the Telephone Mini Addenbrooke’s cognitive assessment (Tele-MACE).

Participants were assigned to a focus group depending on their level of worry about dementia. During focus groups, a vignette prompted discussion around lifespan changes in memory and how this affected concerns around memory. This allowed investigation of the differences in beliefs about memory.

Thematic analysis revealed two key themes. First, older adults appear to base their definition of ‘normality’ of their own memory on comparisons. These comparisons were between themselves and others and between themselves now and their own past self. Despite similar strategies to define ‘normality’, those with high dementia worry had stricter definitions of what they determined as normal. The second theme described narratives around the ‘self’ and the ‘other’. There was a difference between those with high versus low worry; those with high worry had a strong focus on the ‘self’, while those with low dementia worry focused on ‘others’.

Comparison is a common metacognitive strategy used in forming beliefs about memory. Targeting the use of comparison is potentially valuable in interventions aiming to alleviate older adults’ memory concerns. Addressing self-focused thinking, for example, with cognitive behavioural therapy, could improve harmful levels of high worry.

Despite the potential benefits of physiotherapy and physical activity, awareness remains limited among patients with sequela and healthcare professionals. This study aims to explore Danish physiotherapists’ (PTs) perspectives on barriers, facilitators and potential solutions to improve the care of sequelae after cancer in physiotherapy clinics.

This qualitative study used semi-structured interviews with Danish PTs, following a published research protocol and the Criteria for Reporting Qualitative Research checklist. Danish-speaking PTs working in private clinics in Denmark were eligible to participate and were selected via purposive sampling. Online interviews with PTs were conducted in June and July 2022.

A phenomenological approach was employed for data collection and thematic analysis, allowing researchers to set aside preconceptions. Preunderstandings were stated and revisited post-analysis for validation. The interview guide was developed and validated through discussions and pilot testing. A patient panel provided feedback on the interview guide. Interviews were conducted by a trained and experienced PT and transcribed using a standardised key.

Online interviews with 12 PTs were conducted. Five themes were identified: being aware of important physiotherapy competencies, PTs’ basic education and specialisation, patients’ resources, healthcare system and organisation, and sharing knowledge regarding sequelae from cancer and potential treatments. PTs emphasised the need for specialised competencies, emotional resilience and life experience. Patients experienced financial and psychosocial barriers, while systemic issues and poor communication hindered care. PTs suggested public lists of specialised providers and broader dissemination of knowledge to reduce stigma and improve access.

PTs identify clinical and systemic challenges requiring specialisation, improved collaboration and increased awareness to enhance rehabilitation and quality of life for cancer survivors.

To evaluate staffing conditions, patient outcomes, quality of care, patient safety and nurse job outcomes in British Columbia (BC), Canada hospitals.

Cross-sectional study of 58 hospitals in BC with surveys of nurses and independent measures of patient outcomes.

58 hospitals in BC.

6685 hospital-based nurses working in a direct patient care role.

Hospital-wide and unit-specific patient-to-nurse staffing ratios derived from registered nurse reports of how many patients and how many nurses were on their unit during their last shift worked.

Objective patient outcome measures included the Hospital Standardized Mortality Ratio (HSMR) and 30-day Readmission Rate, from 2022 to 2023 Canadian Institute for Health Information data. Nurses4All@BC provided data from 2024 using validated items on multiple measures (eg, nurse burnout, missed health breaks, intentions to leave, quality and safety measures such as culture of patient safety, quality of nursing care, missed nursing care).

Burnout (59.4%), missed health breaks (41.7%), job dissatisfaction (36.0%), intentions to leave (19.3%) and patient outcomes (HSMR mean 95.4, median 96.0, range 26–180; readmission rate mean 10.0%, median 9.5%, range 7.9%–13.8%) were high and varied across hospitals. 68.3% of nurses reported there were not enough staff, and 77.3% reported their workloads were unsafe for patients. 60.6% of nurses gave their hospital an unfavourable patient safety rating. More patients per nurse were associated with poorer hospital mortality and readmission rates, poorer job outcomes for nurses, more adverse events for patients, less favourable ratings of quality of care and patient safety, more missed nursing care and poorer ratings of staffing adequacy and management.

Given the variability in staffing, quality and patient outcomes across BC hospitals, the implementation of a minimum nurse-to-patient ratio policy has the potential to improve patient care safety and retention of nurses.

Colorectal cancer (CRC) is the third most common cancer and the second leading cause of cancer mortality worldwide. Despite the organised CRC screening programme, the uptake rate of the population-based CRC screening was still low. Thus, we will conduct a randomised controlled trial in a community setting to evaluate the effectiveness of a theory-based chatbot in promoting CRC screening uptake.

A total of 500 eligible participants will be randomly assigned to a WhatsApp Messenger-initiated chatbot outreach group or a standard text reminder group at a ratio of 1:1. The intervention group will deliver Chinese culturally tailored education texts and videos developed based on the Health Belief Model and the Trans-Theoretical Model. The control group will deliver a standard text reminder of information about the Hong Kong organised CRC screening programme. In addition to the baseline assessment and postintervention assessment, all subjects will be followed up for 3 months and 6 months, respectively. The primary outcome will be the CRC screening uptake rate at the 3 month and 6 month follow-up. The secondary outcomes will be the intention to undergo CRC screening uptake, time interval to participate in and complete screening after recruitment, and reasons for not participating in screening at the 3 month and 6 month follow-up. Quantitative data will be analysed using Student’s t-test, Pearson’s ² test or Fisher’s exact test. Qualitative data will be analysed by thematic analysis.

Ethical approval of this trial was granted by the Joint Chinese University of Hong Kong-New Territories East Cluster Clinical Research Ethics Committee (2022.614). Written informed consent will be obtained from study participants before enrolment. The findings will be disseminated through peer-reviewed journals.

The study was registered on clinicaltrials.gov (NCT06192862).