A cold case of hemolytic disease of the fetus and newborn resolved by genomic sequencing and population studies to define a new antigen in the Rh system.

BACKGROUND: We report an obstetric case involving an RhD-positive woman who had developed a red blood cell (RBC) antibody that was not detected until after delivery of a newborn, who presented with a positive direct antiglobulin test result. Immunohematology studies suggested that the maternal antibody was directed against a low-prevalence antigen on the paternal and newborn RBCs. RESULTS: Comprehensive blood group profiling by targeted exome sequencing revealed a novel nonsynonymous single nucleotide variant (SNV) RHCE c.486C>G (GenBank MZ326705) on the RHCE*Ce allele, for both the father and newborn. A subsequent genomic-based study to profile blood groups in an Indigenous Australian population revealed the same SNV in 2 of 247 individuals. Serology testing showed that the maternal antibody reacted specifically with RBCs from these two individuals. DISCUSSION: The maternal antibody was directed against a novel antigen in the Rh blood group system arising from an RHCE c.486C>G variant on the RHCE*Ce allele linked to RHD*01. The variant predicts a p.Asn162Lys change on the RhCE protein and has been registered as the 56th antigen in the Rh system, ISBT RH 004063. CONCLUSION: This antibody was of clinical significance, resulting in a mild to moderate hemolytic disease of the fetus and newborn (HDFN). In the past, the cause of such HDFN cases may have remained unresolved. Genomic sequencing combined with population studies now assists in resolving such cases. Further population studies have potential to inform the need to design population-specific red cell antibody typing panels for antibody screening in the Australian population.

Cough in Children and Adults: Diagnosis, Assessment and Management (CICADA). Summary of an updated position statement on chronic cough in Australia.

INTRODUCTION: Cough is the most common symptom leading to medical consultation. Chronic cough results in significant health care costs, impairs quality of life, and may indicate the presence of a serious underlying condition. Here, we present a summary of an updated position statement on cough management in the clinical consultation. MAIN RECOMMENDATIONS: Assessment of children and adults requires a focused history of chronic cough to identify any red flag cough pointers that may indicate an underlying disease. Further assessment with examination should include a chest x-ray and spirometry (when age > 6 years). Separate paediatric and adult diagnostic management algorithms should be followed. Management of the underlying condition(s) should follow specific disease guidelines, as well as address adverse environmental exposures and patient/carer concerns. First Nations adults and children should be considered a high risk group. The full statement from the Thoracic Society of Australia and New Zealand and Lung Foundation Australia for managing chronic cough is available at https://lungfoundation.com.au/resources/cicada-full-position-statement. CHANGES IN MANAGEMENT AS A RESULT OF THIS STATEMENT: Algorithms for assessment and diagnosis of adult and paediatric chronic cough are recommended. High quality evidence supports the use of child-specific chronic cough management algorithms to improve clinical outcomes, but none exist in adults. Red flags that indicate serious underlying conditions requiring investigation or referral should be identified. Early and effective treatment of chronic wet/productive cough in children is critical. Culturally specific strategies for facilitating the management of chronic cough in First Nations populations should be adopted. If the chronic cough does not resolve or is unexplained, the patient should be referred to a respiratory specialist or cough clinic.

Correlates of mental disorder and harmful substance use in an indigenous Australian urban sample: an analysis of data from the Queensland Urban Indigenous Mental Health Survey.

PURPOSE: Limited data exists on the relationship between sociodemographic and cultural variables and the prevalence of specific mental and substance use disorders (MSDs) among Indigenous Australians, using diagnostic prevalence data. This paper utilises data from the Queensland Urban Indigenous Mental Health Survey (QUIMHS), a population-level diagnostic mental health survey, to identify socioeconomic and cultural correlates of psychological distress and specific MSDs in an urban Indigenous Australian sample. METHODS: Using a mixture of household sampling (door-knocking) and snowball sampling (promotion of the survey in the community), 406 participants aged 18 to 89 were recruited across key locations in Southeast Queensland. The study investigated various demographic, socioeconomic, and cultural factors as predictors of psychological distress (measured by the Kessler-5) and MSD diagnoses (utilising the Composite International Diagnostic Interview, CIDI 3.0) using a series of univariate logistic regressions. RESULTS: Individuals in unstable housing (homeless, sleeping rough) and those reporting financial distress were more likely to experience an MSD in the past 12 months and throughout their lifetime. Individuals reporting lower levels of connection and belonging, limited participation in cultural events, and lower empowerment were more likely to have a lifetime mental disorder. CONCLUSION: This data emphasises the importance of addressing systemic and social determinants of health when designing and delivering community mental health services and underscores the need for holistic approaches when working with Indigenous communities.

Thoracic Society of Australia and New Zealand (TSANZ) position statement on chronic suppurative lung disease and bronchiectasis in children, adolescents and adults in Australia and New Zealand.

This position statement, updated from the 2015 guidelines for managing Australian and New Zealand children/adolescents and adults with chronic suppurative lung disease (CSLD) and bronchiectasis, resulted from systematic literature searches by a multi-disciplinary team that included consumers. The main statements are: Diagnose CSLD and bronchiectasis early; this requires awareness of bronchiectasis symptoms and its co-existence with other respiratory diseases (e.g., asthma, chronic obstructive pulmonary disease). Confirm bronchiectasis with a chest computed-tomography scan, using age-appropriate protocols and criteria in children. Undertake a baseline panel of investigations. Assess baseline severity, and health impact, and develop individualized management plans that include a multi-disciplinary approach and coordinated care between healthcare providers. Employ intensive treatment to improve symptom control, reduce exacerbation frequency, preserve lung function, optimize quality-of-life and enhance survival. In children, treatment also aims to optimize lung growth and, when possible, reverse bronchiectasis. Individualize airway clearance techniques (ACTs) taught by respiratory physiotherapists, encourage regular exercise, optimize nutrition, avoid air pollutants and administer vaccines following national schedules. Treat exacerbations with 14-day antibiotic courses based upon lower airway culture results, local antibiotic susceptibility patterns, clinical severity and patient tolerance. Patients with severe exacerbations and/or not responding to outpatient therapy are hospitalized for further treatments, including intravenous antibiotics and intensive ACTs. Eradicate Pseudomonas aeruginosa when newly detected in lower airway cultures. Individualize therapy for long-term antibiotics, inhaled corticosteroids, bronchodilators and mucoactive agents. Ensure ongoing care with 6-monthly monitoring for complications and co-morbidities. Undertake optimal care of under-served peoples, and despite its challenges, delivering best-practice treatment remains the overriding aim.

Differences in the pattern and cost of hospital care between Indigenous and non-Indigenous Australians with cirrhosis: an exploratory study.

BACKGROUND: Liver diseases are important contributors to the mortality gap between Indigenous and non-Indigenous Australians. AIMS: This cohort study examined factors associated with hospital admissions and healthcare outcomes among Indigenous Australians with cirrhosis. METHODS: Patient-reported outcomes were obtained by face-to-face interview (Chronic Liver Disease Questionnaire and Short Form 36 (SF-36)). Clinical data were extracted from medical records and through data linkage for 534 patients (25 indigenous). Cumulative overall survival (Kaplan-Meier), rates of hospital admissions and emergency presentations, and costs were assessed by indigenous status. Incidence rate ratios (IRR; Poisson regression) were reported. RESULTS: Indigenous Australians admitted to hospital with cirrhosis had lower educational status compared with non-indigenous patients (79.2% vs 43.4%; P < 0.001). The two groups had, in general, similar clinical characteristics including disease severity (P = 0.78), presence of cirrhosis complications (P = 0.67), comorbidities (P = 0.62), rates of cirrhosis-related admissions (P = 0.86) and 5-year survival (P = 0.30). However, indigenous patients had a lower score in the SF-36 domain related to bodily pain (P = 0.037), more cirrhosis admissions via the emergency department (IRR = 1.42, 95% confidence interval (CI) 1.10-1.83) and fewer planned cirrhosis admissions (IRR = 0.32, 95% CI 0.14-0.72). The total cost for cirrhosis-related hospital admissions for 534 patients over 6 years (July 2012 to June 2018) was A$13.7 million. The cost of cirrhosis-related hospital admissions was double for indigenous patients (cost ratio = 2.04, 95% CI 2.04-2.05). CONCLUSIONS: Our data highlight the disparities in health service use and patient-reported outcomes, despite having similar clinical profiles. Integration between primary care, Aboriginal Community Controlled Health Organisations and liver specialists is critical for appropriate health service delivery and effective use of resources. Chronic liver disease costs the community dearly.

Partnering with support persons and clinicians to improve the health care experiences of patients with cirrhosis.

AIM: To explore the care experiences of Aboriginal and Torres Strait Islander Australians diagnosed with cirrhosis with a focus on support needed. BACKGROUND: Cirrhosis disproportionately affects Indigenous Australians, and liver diseases contribute to the mortality gap between Indigenous and other Australian adults. DESIGN: A qualitative study. METHODS: Using yarning methods, Indigenous patients (n = 13) and support persons (n = 3) were interviewed by an Aboriginal researcher during April-July, 2020. Thematic analysis was used to identify common themes using an inductive approach. RESULTS: Six themes emerged. (1) Experience of diagnosis. This theme included stories of delays in the system, self-awareness of signs and symptoms and relief of being diagnosed. (2) 'Shame, shame, shame'. Experiences of prejudices and discrimination from health professionals, the lack of understanding of cirrhosis among health professionals, and stories about alcohol cessation and counselling around alcohol cessation. (3) Health literacy. Participants' understanding of cirrhosis was variable. While the importance of knowledge was recognised, 'what works for someone might not work for others'. Several patients partnered with their support persons and clinicians to bridge the health literacy gap. (4) Sources of support included family and friends, transport facilities, health professionals and peers. (5) Positive and negative aspects of communication and patient consultation were discussed. (6) Psychosocial counselling to 'look after the caring side'. The need for more mental health care services was raised. CONCLUSION: Barriers related to poor health literacy, stigma and lack of practical and emotional support, and issues with communication and patient consultation, may lead to inequitable access to cirrhosis care and treatment for Indigenous Australians. RELEVANCE TO CLINICAL PRACTICE: Gaining knowledge of the experiences of Indigenous Australians with cirrhosis is important for providing patient-centred and culturally appropriate care. Liver specialist nurses have an important role in bridging the health literacy gap and in supporting Indigenous patients and families.

Change in health outcomes for First Nations children with chronic wet cough: rationale and study protocol for a multi-centre implementation science study.

BACKGROUND: In children, chronic wet cough may be a sign of underlying lung disease, including protracted bacterial bronchitis (PBB) and bronchiectasis. Chronic (> 4 weeks in duration) wet cough (without indicators pointing to alternative causes) that responds to antibiotic treatment is diagnostic of PBB. Timely recognition and management of PBB can prevent disease progression to irreversible bronchiectasis with lifelong consequences. However, detection and management require timely health-seeking by carers and effective management by clinicians. We aim to improve (a) carer health-seeking for chronic wet cough in their child and (b) management of chronic wet cough in children by clinicians. We hypothesise that implementing a culturally integrated program, which is informed by barriers and facilitators identified by carers and health practitioners, will result in improved lung health of First Nations children, and in the future, a reduced the burden of bronchiectasis through the prevention of the progression of protracted bacterial bronchitis to bronchiectasis. METHODS: This study is a multi-centre, pseudorandomised, stepped wedge design. The intervention is the implementation of a program. The program has two components: a knowledge dissemination component and an implementation component. The implementation is adapted to each study site using a combined Aboriginal Participatory Action Research and an Implementation Science approach, guided by the Consolidated Framework of Implementation Research. There are three categories of outcome measures related to (i) health (ii) cost, and (iii) implementation. We will measure health-seeking as the proportion of parents seeking help for their child in a 6-month period before the intervention and the same 6-month period (i.e., the same six calendar months) thereafter. The parent-proxy, Cough-specific Quality of Life (PC-QoL) will be the primary health-related outcome measure. DISCUSSION: We hypothesise that a tailored intervention at each site will result in improved health-seeking for carers of children with a chronic wet cough and improved clinician management of chronic wet cough. In addition, we expect this will result in improved lung health outcomes for children with a chronic wet cough. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry; ACTRN12622000430730 , registered 16 March 2022, Retrospectively registered.

The impact of Marfan syndrome on an Aboriginal Australian family: 'I don't like it as much as I don't like cancer'.

Marfan syndrome (MFS) is an autosomal dominantly inherited connective tissue disorder. Aortic dilatation/dissection and ectopia lentis are the most severe features, which affect physical functioning and psychological well-being. In Aboriginal Australians, there is little psychosocial research on genetic conditions. This study explored the physical, psychological, and practical impacts of MFS on Aboriginal Australians. Eighteen (8 affected and 10 unaffected) members of a large Aboriginal Australian family with MFS participated in an ethically approved study. Semi-structured qualitative interviews were conducted, transcribed verbatim, and analyzed thematically. All individuals reported challenges from MFS, negatively affecting day-to-day living. Severe vision impairment was perceived as the greatest challenge, contributing to feelings of stigma and exclusion. With aging, concerns shifted toward cardiac complications. The unpredictability of lens dislocation and aortic dissection was reported to be psychologically challenging. Participants described MFS-related barriers to obtaining and retaining employment, especially following cardiac surgery; with consequential psychological and financial hardships. Participants articulated that their cultural drive to support the ill and respectfully mourn the deceased, regardless of distance, resulted in a significant financial burden. Additionally, when hospitalization and/or funerals occurred, financially solvent individuals were expected to share resources, without any expectation of repayment or reciprocity (i.e., 'demand sharing', common in Aboriginal Australian culture). This study documents the nature and pervasiveness of uncertainty for both affected and unaffected members of an MFS family. Many reported challenges are consistent with other MFS cohorts (including stigma, social exclusion, and unemployment). However, our findings suggest that cultural values may exacerbate the financial costs of MFS for Aboriginal Australians.

Translating research into action: The design and development of an Indigenous specific suicide intervention skills training program (I-ASIST).

Note: We respectfully refer to Aboriginal and Torres Strait Islander people as Indigenous in this study. OBJECTIVE: To design and develop an Indigenous specific suicide intervention skills program that focuses on education and intervention training as an effective suicide prevention strategy. METHOD: Using a co-designed wrap-around framework, we developed a program in collaboration with >90 communities, stakeholders and service providers across Australia to understand knowledge, awareness and sense of connectedness between at-risk groups and health services or support groups. RESULTS: The I-ASIST training provides participants with the necessary skills and knowledge to apply a suicide intervention model. The framework behind the intervention model provides caregivers the awareness to recognise when someone may be at risk of suicide. It then gives them the skills to connect with a person at risk of suicide and to understand and clarify that risk, steps to keep that person safe for a specific period and then provide them with the resources or links required for further help. The program enables the development of knowledge through interactive strategies through cultural recognition and empowerment of participants. Based on a social-enterprise model, I-ASIST has been translated into a certified program supported by LivingWorks Australia. CONCLUSION: Based on a strengths-based and self-determination model of co-design, this grass roots innovative framework creates suicide safer communities.

Hospitalisation for cirrhosis in Australia: disparities in presentation and outcomes for Indigenous Australians.

BACKGROUND: Indigenous Australians experience greater health disadvantage and have a higher prevalence of many chronic health conditions. Liver diseases leading to cirrhosis are among the most common contributor to the mortality gap between Indigenous and other Australian adults. However, no comparative data exist assessing differences in presentation and patient outcomes between Indigenous and non-Indigenous Australians hospitalised with cirrhosis. METHODS: Using data from the Hospital Admitted Patient Data Collection and the Death Registry, this retrospective, population-based, cohort study including all people hospitalised for cirrhosis in the state of Queensland during 2008-2017 examined rate of readmission (Poisson regression), cumulative survival (Kaplan-Meier), and assessed the differences in survival (Multivariable Cox regression) by Indigenous status. Predictor variables included demographic, health service characteristics and clinical data. RESULTS: We studied 779 Indigenous and 10,642 non-Indigenous patients with cirrhosis. A higher proportion of Indigenous patients were younger than 50 years (346 [44%] vs. 2063 [19%] non-Indigenous patients), lived in most disadvantaged areas (395 [51%) vs. 2728 [26%]), had alcohol-related cirrhosis (547 [70%] vs. 5041 [47%]), had ascites (314 [40%] vs. 3555 [33%), and presented to hospital via the Emergency Department (510 [68%] vs. 4790 [47%]). Indigenous patients had 3.04 times the rate of non-cirrhosis readmissions (95%CI 2.98-3.10), 1.35 times the rate of cirrhosis-related readmissions (95%CI 1.29-1.41), and lower overall survival (17% vs. 27%; unadjusted hazard ratio (HR) = 1.16 95%CI 1.06-1.27), compared to non-Indigenous patients. Most of the survival deficit was explained by Emergency Department presentation (adj-HR = 1.03 95%CI 0.93-1.13), and alcohol-related aetiology (adj-HR = 1.08 95%CI 0.99-1.19). The remaining survival deficit was influenced by the other clinico-demographic and health service factors (final adj-HR = 1.08 95%CI 0.96-1.20). CONCLUSIONS: There was evidence of differential presentation, higher rates of readmissions, and poorer survival for Indigenous Australians with cirrhosis, compared to other Australians. The increased prevalence of Emergency Department presentation among Indigenous patients suggests missed opportunities for early intervention to prevent progressive cirrhosis complications and hospital readmissions.

Yarning about oral health: perceptions of urban Australian Aboriginal and Torres Strait Islander women.

BACKGROUND: Many factors influence how a person experiences oral health and how such experiences may facilitate supportive oral health behaviours. Women in particular face different challenges due to their environment, responsibilities and physiological differences to men. Within Australia, Aboriginal and Torres Strait Islander women are reported to have poorer oral health and are faced with additional barriers to supporting their oral health compared with non-Indigenous women. The objective of this paper is to report the experiences and perceptions of oral health from the perspective of urban, Aboriginal and Torres Strait Islander women. METHODS: The present data derive from a descriptive study that used yarning circles and face-to-face interviews with women who were mothers/carers of urban, Aboriginal and/or Torres Strait Islander children. This was a qualitative study to investigate the impact of child oral health on families. Participants used the opportunity to share their own personal experiences of oral health as women, thus providing data for the present analyses. Information collected was transcribed and analysed thematically. RESULTS: Twenty women shared their personal narratives on the topic of oral health which were reflective of different time points in their life: growing up, as an adult and as a mother/carer. Although women are trying to support their oral health across their life-course, they face a number of barriers, including a lack of information and the costs of accessing dental care. The teenage years and pregnancy were reported as important time periods for oral health support. CONCLUSIONS: To improve the oral health of Indigenous Australian women, policymakers must consider the barriers reported by women and critically review current oral health information and services. Current oral health services are financially out of reach for Indigenous Australian women and there is not sufficient or appropriate, oral information across the life-course.

Impact of oral health on Australian urban Aboriginal and Torres Strait Islander families: a qualitative study.

BACKGROUND: The oral health of a child not only impacts the physical well-being of the child, but can have quality of life implications for parents and families as they endeavour to provide care and support their child's oral health needs. Within Australia, Aboriginal and Torres Strait Islander children are thought to experience a disproportionate burden of poor oral heath compared to non-Indigenous children. Despite the prevalence of oral health challenges, there are limited qualitative studies investigating the oral health experiences of families. The objective of the study was to explore 'from the perspective of urban, Aboriginal and Torres Strait Islander parents and carers' the impact child oral health has on families. METHODS: Yarning circles and face-to-face interviews were used to document the experiences of (N = 20) parents of urban, Aboriginal and Torres Strait Islander children. Participants were recruited from an Aboriginal-owned and operated primary health clinic in northern Brisbane, Australia and through word of mouth. Information collected was transcribed and analysed thematically. Codes and themes were confirmed by the researcher and two participants. RESULTS: The findings indicate that oral health is an important issue for urban Indigenous families and maintaining oral health to a desired standard is having emotional, physical and financial impacts. Themes identified were financial concerns, worry about the future and juggling multiple priorities, all of which were inter-related and cyclical. CONCLUSIONS: Families in this study have demonstrated that with the current policy arrangements, oral health is impacting their quality of life, contributing to stress, financial challenges and at times affecting their physical health. To address these challenges, oral health education and promotion needs a multidisciplinary approach that reaches families before children are school-aged.

Cultural validation of the structured clinical interview for diagnostic and statistical manual of mental disorders in Indigenous Australians.

OBJECTIVE: This study determined the cultural appropriateness of the Structured Clinical Interview for the DSM-IV Axis I Disorders (SCID-I) as an acceptable tool for diagnosing mental illness among Indigenous people. METHODS: De-identified qualitative feedback from participants and psychologists regarding the cultural appropriateness of the SCID-I for Indigenous people using open-ended anonymous questionnaires was gathered. Aboriginal Medial Service staff and Indigenous Support Workers participated in a focus group. RESULTS: A total of 95.6% of participants felt comfortable during the 498 questionnaires completed. Psychologists also provided qualitative feedback for 502 (92.3%) interviews, of whom 40.4% established a good rapport with participants. Of the participants, 77.7% understood the SCID-I questions well, while 72.5% did not require any cultural allowances to reach a clinical diagnosis. CONCLUSION: When administered by a culturally safe trained psychologist, SCID-I is well tolerated in this group.

Barriers and enablers to postpartum contraception among Aboriginal Australian women: factors influencing contraceptive decisions.

This qualitative research obtained insights into factors influencing postpartum contraception use among Aboriginal women in southern Queensland. Seventeen women participated in focus groups or interviews from July to October 2015 at an Aboriginal and Torres Strait Islander Community-Controlled Health Organisation. Data were analysed with open coding and thematic analysis. The results affirmed Aboriginal women want control over family planning. Participants indicated more could be done to improve health literacy and contraception uptake. A variety of family planning preferences were revealed, with an almost universal desire for increased access to postpartum contraception. Participants wanted information given antenatally and postnatally. Obtaining and using contraception were difficult for many. Social factors that hinder access such as shame, ideas surrounding women's health, cultural disengagement, social isolation and using childbearing to control relationships were identified. The reproductive outcomes of Aboriginal women often do not reflect their preferences. A mandate exists to provide information about and access to postpartum contraception, empowering women with greater control over their reproductive practices. Health professionals can play a key role in dismantling barriers to autonomous family planning by offering information and resources both antenatally and postnatally.

An Australian Indigenous community-led suicide intervention skills training program: community consultation findings.

BACKGROUND: Little is known of the appropriateness of existing gatekeeper suicide prevention programs for Indigenous communities. Despite the high rates of Indigenous suicide in Australia, especially among Indigenous youth, it is unclear how effective existing suicide prevention programs are in providing appropriate management of Indigenous people at risk of suicide. METHODS: In-depth, semi-structured interviews and focus groups were conducted with Indigenous communities in rural and regional areas of Southern Queensland. Thematic analysis was performed on the gathered information. RESULTS: Existing programs were time-intensive and included content irrelevant to Indigenous people. There was inconsistency in the content and delivery of gatekeeper training. Programs were also not sustainable for rural and regional Indigenous communities. CONCLUSIONS: Appropriate programs should be practical, relevant, and sustainable across all Indigenous communities, with a focus on the social, emotional, cultural and spiritual underpinnings of community wellbeing. Programs need to be developed in thorough consultation with Indigenous communities. Indigenous-led suicide intervention training programs are needed to mitigate the increasing rates of suicide experienced by Indigenous peoples living in rural and remote locations.

The need for a culturally-tailored gatekeeper training intervention program in preventing suicide among Indigenous peoples: a systematic review.

BACKGROUND: Suicide is a leading cause of death among Indigenous youth worldwide. The aim of this literature review was to determine the cultural appropriateness and identify evidence for the effectiveness of current gatekeeper suicide prevention training programs within the international Indigenous community. METHOD: Using a systematic strategy, relevant databases and targeted resources were searched using the following terms: 'suicide', 'gatekeeper', 'training', 'suicide prevention training', 'suicide intervention training' and 'Indigenous'. Other internationally relevant descriptors for the keyword "Indigenous" (e.g. "Maori", "First Nations", "Native American", "Inuit", "Metis" and "Aboriginal") were also used. RESULTS: Six articles, comprising five studies, met criteria for inclusion; two Australian, two from USA and one Canadian. While pre and post follow up studies reported positive outcomes, this was not confirmed in the single randomised controlled trial identified. However, the randomised controlled trial may have been underpowered and contained participants who were at higher risk of suicide pre-training. CONCLUSION: Uncontrolled evidence suggests that gatekeeper training may be a promising suicide intervention in Indigenous communities but needs to be culturally tailored to the target population. Further RCT evidence is required.

Systematic review of interventions for Indigenous adults with mental and substance use disorders in Australia, Canada, New Zealand and the United States.

OBJECTIVE: The aim of this study was to systematically review the evidence-base for the effectiveness of culturally unadapted, culturally adapted and culture-based interventions for Indigenous adults with mental or substance use disorders. METHODS: We conducted a systematic search of scientific databases, government websites and web-based Indigenous research repositories. We sought studies using designs comparing an intervention group to a control/comparator group or pre- and post-test designs, published between 2000 and 2015 examining interventions to improve individual-level outcomes (e.g. remission, symptoms, quality of life, functioning) or service-level outcomes (e.g. number of interventions delivered) for Indigenous adults with mental or substance use disorders in Australia, Canada, New Zealand or the United States. RESULTS: A total of 16 studies met inclusion criteria. Virtually all North American studies (6 US and 1 Canadian) evaluated culturally unadapted interventions, all of which were interventions for substance use. Two-thirds of Australian and New Zealand studies evaluated culturally adapted interventions and included samples with mental disorders. Of eight culturally unadapted psychological/psychosocial, pharmacological and educational intervention studies, seven reported significant improvements on at least one measure of psychological well-being, mental health problem severity, or significantly reduced alcohol or illicit drug use. Of seven culturally adapted psychological/psychosocial intervention studies, all reported significant improvement on at least one measure of symptoms of mental illness, functioning, and alcohol use. One culture-based psychological/psychosocial intervention study significantly reduced problem severity in medical and psychiatric domains. CONCLUSION: There remains inconclusive evidence regarding interventions due to a small and methodologically weak evidence-base. The literature would be enhanced by intervention replication and outcome standardisation, validating the outcome instruments used in Indigenous populations, including sample size calculations and using stronger research designs (e.g. interrupted time-series designs). Robust implementation and outcomes research is needed to further progress evidence-based practice in Indigenous mental health.