A pilot study to develop assessment tools for Group A Streptococcus surveillance studies.

Introduction: Group A Streptococcus (GAS) causes pharyngitis (sore throat) and impetigo (skin sores) GAS pharyngitis triggers rheumatic fever (RF) with epidemiological evidence supporting that GAS impetigo may also trigger RF in Australian Aboriginal children. Understanding the concurrent burden of these superficial GAS infections is critical to RF prevention. This pilot study aimed to trial tools for concurrent surveillance of sore throats and skins sore for contemporary studies of RF pathogenesis including development of a sore throat checklist for Aboriginal families and pharynx photography. Methods: Yarning circle conversations and semi-structured interviews were performed with Aboriginal caregivers and used to develop the language and composition of a sore throat checklist. The sore throat story checklist was combined with established methods of GAS pharyngitis and impetigo surveillance (examination, bacteriological culture, rapid antigen detection and serological tests) and new technologies (photography) and used for a pilot cross-sectional surveillance study of Aboriginal children attending their health clinic for a routine appointment. Feasibility, acceptability, and study costs were compiled. Results: Ten Aboriginal caregivers participated in the sore-throat yarning circles; a checklist was derived from predominant symptoms and their common descriptors. Over two days, 21 Aboriginal children were approached for the pilot surveillance study, of whom 17 were recruited; median age was 9 years [IQR 5.5-13.5], 65% were female. One child declined throat swabbing and three declined finger pricks; all other surveillance elements were completed by each child indicating high acceptability of surveillance assessments. Mean time for screening assessment was 19 minutes per child. Transport of clinical specimens enabled gold standard microbiological and serological testing for GAS. Retrospective examination of sore throat photography concorded with assessments performed on the day. Conclusion: Yarning circle conversations were effective in deriving culturally appropriate sore throat questionnaires for GAS pharyngitis surveillance. New and established tools were feasible, practical and acceptable to participants and enable surveillance to determine the burden of superficial GAS infections in communities at high risk of RF. Surveillance of GAS pharyngitis and impetgio in remote Australia informs primary RF prevention with potential global translation.

Implementation of the 'Kimberley Mum's Mood Scale' across primary health care services in the Kimberley region of Western Australia: A mixed methods assessment.

The Kimberley Mum's Mood Scale (KMMS) was co-designed with Aboriginal women and healthcare professionals to improve culturally appropriate screening practices for perinatal depression and anxiety. This paper describes the implementation of the KMMS across the remote Kimberley region of Western Australia from January 2018 to December 2021. We used the Dynamic Sustainability Framework to progress the implementation and assess at the intervention, practice setting and ecological system level using a mixed methods approach to analyse implementation. Rates of administration and results of screening were described using a retrospective audit of electronic medical records. Analyses of KMMS training registry, stakeholder engagement and sustainability initiatives were descriptive. KMMS acceptability was assessed using qualitative descriptive approaches to analyse patient feedback forms (n = 39), healthcare professional surveys (n = 15) and qualitative interviews with healthcare professionals (n = 6). We found a significant increase in overall recorded perinatal screening (pre-implementation: 30.4% v Year 3: 46.5%, P < 0.001) and use of the KMMS (pre-implementation: 16.4% v Year 3: 46.4%, P < 0.001). There was improved fidelity in completing the KMMS (from 2.3% to 61.8%, P < 0.001), with 23.6% of women screened recorded as being at increased risk of depression and anxiety. Most healthcare professionals noted the high levels of perinatal mental health concerns, stress, and trauma that their patients experienced, and identified the KMMS as the most appropriate perinatal screening tool. Aboriginal women reported that it was important for clinics to ask about mood and feelings during the perinatal period, and that the KMMS was appropriate. Aboriginal women consistently reported that it was good to have someone to talk to. This study demonstrates that innovation in perinatal depression and anxiety screening for Aboriginal women is possible and can be implemented into routine clinical care with the support of a sustained multi-year investment and strong partnerships.

Early childhood development practices in a remote Aboriginal Community Controlled Health Services setting.

OBJECTIVE: Supporting Early Childhood Development (ECD) is an Australian national priority. Aboriginal children in Western Australia's Kimberley region have much higher rates of developmental concerns at school entry than non-Aboriginal children. We aimed to describe ECD practices in the participating service; document follow-up of identified developmental concerns; and identify barriers and enablers to incorporating ECD practices into clinic activity. DESIGN: Mixed-method design incorporating clinical audit and staff interviews. SETTING: An Aboriginal Community Controlled Health Service (ACCHS) in the Kimberley region. PARTICIPANTS: A total of 176 children receiving primary health care through the participating ACCHS; interviews with five ACCHS staff members. MAIN OUTCOME MEASURES: Frequency of developmental enquiry by age and domain; follow-up of identified developmental concerns; and barriers and enablers to ECD practices. RESULTS: Developmental enquiry was documented for 114 of 176 eligible children (65%), including in 80% of ACCHS child health assessments. Standardised ECD assessments were less common. Staff were aware of the importance of developmental enquiry, however, barriers to increasing ECD practices included a lack of resources and structured staff education, time pressures and a lack of role clarity between the ACCHS and government community health clinic. CONCLUSIONS: This study provides insight into ECD practices in an ACCHS setting, highlighting the potential of primary health care to have an enhanced role in ECD if appropriate systems, training and tools are provided. A lack of role clarity across services, combined with poor communication between services, creates a potential risk for missed opportunities to support ECD.

Strong Carers, Strong Communities: a cluster randomised controlled trial to improve wellbeing of family carers of older people in remote Aboriginal communities.

INTRODUCTION: Unpaid carers have a crucial role in supporting older people with cognitive impairment and disability, but their own health and wellbeing are often impacted. There are limited data on how carer strain, depression and empowerment may be improved for carers. METHODS: This was a cluster randomised controlled trial to compare the effect of a carer support program developed with a community-based participatory action research (PAR) approach to the delivery of information sessions to 100 carers of people aged 45 years or more living in four remote Aboriginal communities in Western Australia. RESULTS: The mean age of carers was 38.3±14.9 years, 76% were female and 77% were children or grandchildren of the care recipient. Carer strain and empowerment measures did not change significantly between baseline and follow-up. A statistically significant decrease in depression scores was observed in the PAR group. However, decreases were observed in both the PAR and control groups, and the change in scores did not differ significantly between groups. Depression scores decreased most in those who had not attended high school. Overall, the proportion of participants meeting criteria for depression decreased from 18.8% at baseline to 8.3% at follow-up. CONCLUSION: A carer support program was of equivocal benefit, although this research demonstrates that the wellbeing of carers in remote Aboriginal communities can potentially be markedly improved by outreach strategies.

Above and Beyond: Fashioning an Accessible Health Service for Aboriginal Youth in Remote Western Australia.

BACKGROUND: Young Aboriginal people are at an important stage in the development of their health and wellbeing. They experience significant morbidity and mortality, and their access to medical services may be limited by geographic remoteness and difficulty obtaining appropriate care. Aboriginal Community Controlled Health Services offer primary health care considered to be more accessible for Aboriginal people. OBJECTIVE: This study is one component of research aiming to enhance access for young Aboriginal people in a remote area of Western Australia. It aims to add to our previous study focusing on perceptions of local young people, through exploring the understandings of health care staff regarding access for young Aboriginal people. METHODS: This qualitative study involved semistructured individual and group interviews with 24 staff who work with young Aboriginal people at a remote Aboriginal Community Controlled Health Service. Transcripts were descriptively coded and thematically analyzed by the research team. RESULTS: Staff identified a number of challenges in working with 16- to 25-year-old Aboriginal people, which revolved around the interface between the service, its staff and the young people. They also suggested strategies designed to engage these young people. The strategies included relationship-building, communication, trust and confidentiality with individuals; and targeted clinics, partnerships, health promotion, and an open door policy by clinics. The strategies used by staff were flexible and expansive in nature. CONCLUSIONS: Engagement can be enhanced by a health service willing to "go the extra mile," with a strategic, enveloping and innovative approach, resourcing and the right people with the right attitude.

Aboriginal women's experiences of strengths and challenges of antenatal care in the Kimberley: A qualitative study.

BACKGROUND: High-quality, culturally safe antenatal care has an important role in improving health outcomes of Aboriginal and Torres Strait Islander people. We sought to describe Aboriginal women's experiences of antenatal care in the Kimberley region of Western Australia, to better understand current systems and opportunities for enhancing antenatal care. METHODS: Throughout the Kimberley, 124 Aboriginal women who had accessed antenatal care in 2015-2018 were recruited. They provided qualitative data during a health assessment or standalone interview. Transcripts were descriptively coded and thematically analysed. FINDINGS: Most women expressed that overall they had a positive antenatal care experience. Key themes were the importance of positive relationships with antenatal care providers, the valuable role of family support during the antenatal period, challenges travelling for care and limitations of the Patient Assisted Travel Scheme, communication of pregnancy related information, and the provision of services. Almost all antenatal care providers described were non-Aboriginal. A few women spoke about involvement of Aboriginal Health Workers in their antenatal care, including recommending expansion of these roles. CONCLUSIONS: The experiences shared by these Aboriginal women in the Kimberley contribute to broader evidence of a need to improve culturally safe antenatal care delivery for Aboriginal Australian women. Although excellent care was provided by a number of dedicated midwives, there were few Aboriginal antenatal staff and significant staff turnover. To improve the quality of care more local Aboriginal antenatal care providers, and additional support for the large number of women and their families required to travel, are required.

Why validation is not enough: Setting the scene for the implementation of the Kimberley Mum's Mood Scale.

BACKGROUND: The two part Kimberley Mum's Mood Scale (KMMS) has been developed and validated as a culturally appropriate perinatal depression and anxiety screening tool for Aboriginal women living in the sparsely populated Kimberley region of North West Australia. As part of implementation aspects of user acceptability were explored to improve clinical utilisation of the KMMS. METHODS: Eighteen health professionals involved in perinatal care participated in an online survey or a qualitative semi-structured interview. Ten Aboriginal women (who held administrative, professional or executive roles) were subsequently interviewed in depth to further explore aspects of KMMS user acceptability. RESULTS: Many of the health professionals were not using the second part of the KMMS (the psychosocial discussion tool). Time constraints and a perception that the KMMS is only appropriate for women with literacy issues were identified by health professionals as significant barriers to KMMS uptake. In contrast the Aboriginal women interviewed considered the KMMS to be important for literate Aboriginal women and placed high value on having the time and space to 'yarn' with health professionals about issues that are important to them. CONCLUSION: Implementing the KMMS across the Kimberley region requires health professionals to be trained. It also requires strategic engagement with health services to ensure health professionals and mangers understand the rationale and significance of the KMMS and are engaged in its successful implementation.

Study protocol: a clinical trial for improving mental health screening for Aboriginal and Torres Strait Islander pregnant women and mothers of young children using the Kimberley Mum's Mood Scale.

BACKGROUND: Improving the rates of, and instruments used in, screening for perinatal depression and anxiety among Aboriginal and Torres Strait Islander women are important public health priorities. The Kimberley Mum's Mood Scale (KMMS) was developed and later validated as an effective and acceptable perinatal depression and anxiety screening tool for the Kimberley region under research conditions. Other regions have expressed interest in using the KMMS with perinatal Aboriginal and Torres Strait Islander women. It is, however, important to re-evaluate the KMMS in a larger Kimberley sample via a real world implementation study, and to test for applicability in other remote and regional environments before recommendations for wider use can be made. This paper outlines the protocol for evaluating the process of implementation and establishing the 'real world' validity and acceptability of the KMMS in the Kimberley, Pilbara and Far North Queensland in northern Australia. METHODS: The study will use a range of quantitative and qualitative methods across all sites. KMMS validation/revalidation internal consistency of Part 1 will be determined using Cronbach's alpha. Equivalence for identifying risk of depression and anxiety compared to a standard reference assessment will be determined from receiver operating characteristic curves. Sensitivity and specificity will be determined based on these cut-points. Qualitative methods of phenomenology will be used to explore concepts of KMMS user acceptability (women and health professionals). Additional process evaluation methods will collate, assess and report on KMMS quality review data, consultations with health service administrators and management, field notes, and other documentation from the research team. This information will be reported on using the Dynamic Sustainability Framework. DISCUSSION: This project is contributing to the important public health priority of screening Aboriginal and Torres Strait Islander women for perinatal depression and anxiety with tools that are meaningful and responsive to cultural and clinical needs. Identifying and addressing barriers to implementation contributes to our understanding of the complexity of improving routine clinical practie. TRIAL REGISTRATION: The study was registered retrospectively on 15/05/2019 with the Australian and New Zealand Clinical Trial registry (ACTRN12619000580178).

First-in-human in vivo non-invasive assessment of intra-tumoral metabolic heterogeneity in renal cell carcinoma.

Intratumoral genetic heterogeneity and the role of metabolic reprogramming in renal cell carcinoma (RCC) have been extensively documented. However, the distribution of these metabolic changes within the tissue has not been explored. We report on the first-in-human in vivo non-invasive metabolic interrogation of RCC using hyperpolarized carbon-13 (13C) magnetic resonance imaging (HP-MRI) and describe the validation of in vivo lactate metabolic heterogeneity against multi-regional ex vivo mass spectrometry. HP-MRI provides an in vivo assessment of metabolism and provides a novel opportunity to safely and non-invasively assess cancer heterogeneity.

Young Aboriginal People's Perspective on Access to Health Care in Remote Australia: Hearing Their Voices.

BACKGROUND: Young Australian Aboriginal people experience poor health outcomes, yet young people and Aboriginal people have low use of health care. OBJECTIVE: To identify barriers and enablers of access for adolescent and young adult Aboriginal people at Derby Aboriginal Health Service (DAHS), a remote Western Australian Aboriginal Community Controlled Health Service (ACCHSs), to assist in improving access. METHODS: This qualitative study was in the remote Kimberley town of Derby and three Aboriginal communities serviced by DAHS. Semistructured interviews with 26 young Aboriginal people in 2014 and 2015 were used to identify barriers and enablers to accessing local health care services. RESULTS: Participants appreciated interacting with Aboriginal staff, local staff, and longer term DAHS staff. This improved communication and interpersonal interactions, which were reported to be of prime importance for young Aboriginal people accessing health services. Maintaining confidentiality, minimizing shame, and gender matching with health staff were also key issues for young people. Seeking health care was often based on acute need rather than proactive or preventive care; however, participants recognized that providing health education and health promotion should be a priority for the service. CONCLUSIONS: A number of approaches to improving health service use by young remote Aboriginal people may be effective. Improving youth engagement seems to be central to increasing acceptability and, hence, use. This requires that staff able to engage with young people are recruited, trained, and retained. More immediately, a range of simpler changes to service provision focus and environment for young people could potentially make important differences.

Pregnancy intentions in a group of remote-dwelling Australian Aboriginal women: a qualitative exploration of formation, expression and implications for clinical practice.

BACKGROUND: Unintended pregnancies are associated with poorer obstetric outcomes and are sometimes measured at a population level as a surrogate marker for reproductive autonomy and access to health services, including contraception. Aboriginal Australians face many disparities in health outcomes, including in reproductive health and antenatal care. We aimed to explore the formation and expression of pregnancy intentions in an Aboriginal population to inform health service improvements. METHODS: Semi-structured interviews were conducted with 27 remote-dwelling Aboriginal women, aged 18-49 years. Content analysis was conducted; key themes were discussed with groups of women from participating communities to refine interpretation. RESULTS: Most (19/27) participants expressed pregnancy intentions congruent with reported contraceptive behaviour while eight expressed ambivalent or uncertain intentions. Intentions were shaped by traditional kinship practices, reproductive autonomy and desired family formation. Younger women tended to aspire to smaller family sizes than older women and support was expressed for the postponement of first pregnancy to achieve other life goals. Women in these communities hold strong traditional beliefs, including regarding conception, but did not use traditional methods of contraception in place of modern methods. Reproductive coercion, in the form of pressure to fall pregnant, was recognised as an important issue by women in the community. CONCLUSION: Consultation strategies that promote rapport, allow space for uncertainty and are inclusive of important personal and cultural contexts are likely to improve shared understanding of pregnancy intention. Universal screening for reproductive coercion and broad counselling on contraceptive options (including discrete methods) may reduce unmet need for contraception. Community approaches supporting reproductive autonomy that is inclusive of men, and enhanced educational and occupational opportunities for young women are needed.

Social network analysis of rural medical networks after medical school immersion in a rural clinical school.

BACKGROUND: The impact of new medical graduates on the social dimensions of the rural medical workforce is yet to be examined. Social Network Analysis (SNA) is able to visualize and measure these dimensions. We apply this method to examine the workforce characteristics of graduates from a representative Australian Rural Clinical School. METHODS: Participants were medical graduates of the Rural Clinical School of Western Australia (RCSWA) from the 2001-2014 cohorts, identified as being in rural work in 2017 by the Australian Health Practitioner Regulation Agency. SNA was used to examine the relationships between site of origin and of work destination. Data were entered into UCInet 6 as tied pairs, and visualized using Netdraw. UCINet statistics relating to node centrality were obtained from the node editor. RESULTS: SNA measures showed that the 124 of 709 graduates in rural practice were distributed around Australia, and that their practice was strongly focused on the North, with a clear centre in the remote Western Australian town of Broome. Women were strongly recruited, and were widely distributed. CONCLUSIONS: RCSWA appears to be a "weak tie" according to SNA theory: the School attracts graduates to rural nodes where they had only passing prior contact. The multiple activities that comprise the social capital of the most attractive, remote, node demonstrate the clear workforce effects of being a "bridge, broker and boundary spanner" in SNA terms, and add new understanding about recruiting to the rural workforce.

'It's Important to Make Changes.' Insights about Motivators and Enablers of Healthy Lifestyle Modification from Young Aboriginal Men in Western Australia.

Lifestyle modification can improve the health of people with or at risk of non-communicable diseases; however, initiating and maintaining positive health behaviours including healthy eating and physical activity is challenging. Young remote Aboriginal people who had successfully made significant healthy lifestyle changes were sought out to explore how they achieved this success. Four Aboriginal men aged 20⁻35 years were identified and consented to participate. Their perceptions of motivation for change, strategies, and facilitators and barriers were explored through in-depth interviews. Themes developed from the interviews included self-efficacy, self-reliance, and increased knowledge and altered health beliefs underpinning change. Participants with diabetes were highly motivated to avoid diabetes complications and had a strong belief that their actions could achieve this. In a setting with high levels of disadvantage, participants had relatively favourable socioeconomic circumstances with solid social supports. These findings highlight that lifestyle modification programs that foster internal motivation, enhance key health knowledge, and modify health beliefs and risk perception are needed. Increasing diabetes awareness among at-risk young people is important, emphasising the largely preventable and potentially reversible nature of the condition. Broad health improvements and individual changes will be facilitated by equitable socioeconomic circumstances and environments that support health.

Assessment, incidence and factors associated with urinary incontinence in older Aboriginal Australians.

BACKGROUND: Little is known about urinary incontinence in older Aboriginal Australians. AIM: To describe urinary incontinence assessment, prevalence, incidence and associated conditions in older Aboriginal Australians. METHODS: Wave 1 consisted of 363 Aboriginal participants aged ≥45 years from Western Australia; 289 participants participated in Wave 2, with 184 included at both time points. Urinary incontinence was assessed by self-report, family report and the modified International Consultation on Incontinence Questionnaire (ICIQ). We investigated factors associated with incontinence with binary logistic regression. Sensitivity and specificity analyses of incontinence measures were undertaken using the ICIQ score ≥2 as the reference standard. RESULTS: Participant mean age was 61.2 ± 11.2 years. Prevalence of incontinence at Wave 2 (n = 289) using self-report was 24.6%; using ICIQ ≥2 was 22.5%; and family report 14.2%. Incidence after follow-up of 6.7 years was 33 (23.6%), higher than estimates of 5-20% in other populations. Cross-sectional associations with incontinence include female sex (odds ratio (OR) = 6.82; 95% confidence interval (CI) 2.98-15.57), stroke (OR = 3.55; 95% CI 1.43-8.77), head injury (OR = 3.15; 95% CI 1.54-6.45) and depressive symptoms (OR = 1.07; 95% CI 1.01-1.14). Longitudinal associations were age (OR = 1.05; 95% CI 1.01-1.09) and female sex (OR = 2.37; 95% CI 0.99-5.67). Sensitivity (81.5%) and specificity (93.5%) of self-report were high. CONCLUSION: The prevalence and incidence of urinary incontinence in Aboriginal Australians is high with risk factors of older age and female sex. The modified ICIQ and self-report appear to be appropriate incontinence screens. Further research to understand causes and treatments within this population is urgently required.

Semiautomatic Assessment of the Terminal Ileum and Colon in Patients with Crohn Disease Using MRI (the VIGOR++ Project).

RATIONALE AND OBJECTIVES: The objective of this study was to develop and validate a predictive magnetic resonance imaging (MRI) activity score for ileocolonic Crohn disease activity based on both subjective and semiautomatic MRI features. MATERIALS AND METHODS: An MRI activity score (the "virtual gastrointestinal tract [VIGOR]" score) was developed from 27 validated magnetic resonance enterography datasets, including subjective radiologist observation of mural T2 signal and semiautomatic measurements of bowel wall thickness, excess volume, and dynamic contrast enhancement (initial slope of increase). A second subjective score was developed based on only radiologist observations. For validation, two observers applied both scores and three existing scores to a prospective dataset of 106 patients (59 women, median age 33) with known Crohn disease, using the endoscopic Crohn's Disease Endoscopic Index of Severity (CDEIS) as a reference standard. RESULTS: The VIGOR score (17.1 × initial slope of increase + 0.2 × excess volume + 2.3 × mural T2) and other activity scores all had comparable correlation to the CDEIS scores (observer 1: r = 0.58 and 0.59, and observer 2: r = 0.34-0.40 and 0.43-0.51, respectively). The VIGOR score, however, improved interobserver agreement compared to the other activity scores (intraclass correlation coefficient = 0.81 vs 0.44-0.59). A diagnostic accuracy of 80%-81% was seen for the VIGOR score, similar to the other scores. CONCLUSIONS: The VIGOR score achieves comparable accuracy to conventional MRI activity scores, but with significantly improved reproducibility, favoring its use for disease monitoring and therapy evaluation.

Low frequency oscillating gradient spin-echo sequences improve sensitivity to axon diameter: An experimental study in viable nerve tissue.

Mapping axon diameters within the central and peripheral nervous system could play an important role in our understanding of nerve pathways, and help diagnose and monitor an array of neurological disorders. Numerous diffusion MRI methods have been proposed for imaging axon diameters, most of which use conventional single diffusion encoding (SDE) spin echo sequences. However, a growing number of studies show that oscillating gradient spin echo (OGSE) sequences can provide additional advantages over conventional SDE sequences. Recent theoretical results suggest that this is especially the case in realistic scenarios, such as when fibres have unknown or dispersed orientation. In the present study, we adopt the ActiveAx approach to experimentally investigate the extent of these advantages by comparing the performances of SDE and trapezoidal OGSE in viable nerve tissue. We optimise SDE and OGSE ActiveAx protocols for a rat peripheral nerve tissue and test their performance using Monte Carlo simulations and a 800 mT/m gradient strength pre-clinical imaging experiment. The imaging experiment uses excised sciatic nerve from a rat's leg placed in a MRI compatible viable isolated tissue (VIT) maintenance chamber, which keeps the tissue in a viable physiological state that preserves the structural complexity of the nerve and enables lengthy scan times. We compare model estimates to histology, which we perform on the nerve post scanning. Optimisation produces a three-shell SDE and OGSE ActiveAx protocol, with the OGSE protocol consisting of one SDE sequence and two low-frequency oscillating gradient waveform sequences. Both simulation and imaging results show that the OGSE ActiveAx estimates of the axon diameter index have a higher accuracy and a higher precision compared to those from SDE. Histology estimates of the axon diameter index in our nerve tissue samples are 4-5.8 µm and these are excellently matched with the OGSE estimates 4.2-6.5 µm, while SDE overestimates at 5.2-8 µm for the same sample. We found OGSE estimates to be more precise with on average a 0.5 µm standard deviation compared to the SDE estimates which have a 2 µm standard deviation. When testing the robustness of the estimates when the number of the diffusion gradient directions reduces, we found that both OGSE and SDE estimates are affected, however OGSE is more robust to these changes than the SDE. Overall, these results suggest, quantitatively and in in vivo conditions, that low-frequency OGSE sequences may provide improved accuracy of axon diameter mapping compared to standard SDE sequences.

Echocardiographic Screening for Rheumatic Heart Disease in Indigenous Australian Children: A Cost-Utility Analysis.

BACKGROUND: Rheumatic heart disease (RHD) remains a leading cause of cardiovascular morbidity and mortality in children and young adults in disadvantaged populations. The emergence of echocardiographic screening provides the opportunity for early disease detection and intervention. Using our own multistate model of RHD progression derived from Australian RHD register data, we performed a cost-utility analysis of echocardiographic screening in indigenous Australian children, with the dual aims of informing policy decisions in Australia and providing a model that could be adapted in other countries. METHODS AND RESULTS: We simulated the outcomes of 2 screening strategies, assuming that RHD could be detected 1, 2, or 3 years earlier by screening. Outcomes included reductions in heart failure, surgery, mortality, disability-adjusted life-years, and corresponding costs. Only a strategy of screening all indigenous 5- to 12-year-olds in half of their communities in alternate years was found to be cost-effective (incremental cost-effectiveness ratio less than AU$50 000 per disability-adjusted life-year averted), assuming that RHD can be detected at least 2 years earlier by screening; however, this result was sensitive to a number of assumptions. Additional modeling of improved adherence to secondary prophylaxis alone resulted in dramatic reductions in heart failure, surgery, and death; these outcomes improved even further when combined with screening. CONCLUSIONS: Echocardiographic screening for RHD is cost-effective in our context, assuming that RHD can be detected ≥2 years earlier by screening. Our model can be adapted to any other setting but will require local data or acceptable assumptions for model parameters.

Feasibility of vocal fold abduction and adduction assessment using cine-MRI.

OBJECTIVE: Determine feasibility of vocal fold (VF) abduction and adduction assessment by cine magnetic resonance imaging (cine-MRI) METHODS: Cine-MRI of the VF was performed on five healthy and nine unilateral VF paralysis (UVFP) participants using an axial gradient echo acquisition with temporal resolution of 0.7 s. VFs were continuously imaged with cine-MRI during a 10-s period of quiet respiration and phonation. Scanning was repeated twice within an individual session and then once again at a 1-week interval. Asymmetry of VF position during phonation (VF phonation asymmetry, VFPa) and respiration (VF respiration asymmetry, VFRa) was determined. Percentage reduction in total glottal area between respiration and phonation (VF abduction potential, VFAP) was derived to measure overall mobility. An un-paired t-test was used to compare differences between groups. Intra-session, inter-session and inter-reader repeatability of the quantitative metrics was evaluated using intraclass correlation coefficient (ICC). RESULTS: VF position asymmetry (VFPa and VFRa) was greater (p=0.012; p=0.001) and overall mobility (VFAP) was lower (p=0.008) in UVFP patients compared with healthy participants. ICC of repeatability of all metrics was good, ranged from 0.82 to 0.95 except for the inter-session VFPa (0.44). CONCLUSION: Cine-MRI is feasible for assessing VF abduction and adduction. Derived quantitative metrics have good repeatability. KEY POINTS: • Cine-MRI is used to assess vocal folds (VFs) mobility: abduction and adduction. • New quantitative metrics are derived from VF position and abduction potential. • Cine-MRI able to depict the difference between normal and abnormal VF mobility. • Cine-MRI derived quantitative metrics have good repeatability.

Falls risk assessment outcomes and factors associated with falls for older Indigenous Australians.

OBJECTIVE: To describe the prevalence of falls and associated risk factors in older Indigenous Australians, and compare the accuracy of validated falls risk screening and assessment tools in this population in classifying fall status. METHOD: Cross-sectional study of 289 Indigenous Australians aged ≥45 years from the Kimberley region of Western Australia who had a detailed assessment including self-reported falls in the past year (n=289), the adapted Elderly Falls Screening Tool (EFST; n=255), and the Falls Risk for Older People-Community (FROP-Com) screening tool (3 items, n=74) and FROP-Com falls assessment tool (n=74). RESULTS: 32% of participants had ≥1 fall in the preceding year, and 37.3% were classified high falls risk using the EFST (cut-off ≥2). In contrast, for the 74 participants assessed with the FROP-Com, only 14.9% were rated high risk, 35.8% moderate risk, and 49.3% low risk. The FROP-Com screen and assessment tools had the highest classification accuracy for identifying fallers in the preceding year (area under curve >0.85), with sensitivity/specificity highest for the FROP-Com assessment (cut-off ≥12), sensitivity=0.84 and specificity=0.73. CONCLUSIONS: Falls are common in older Indigenous Australians. The FROP-Com falls risk assessment tool appears useful in this population, and this research suggests changes that may improve its utility further.