Incidence of Stroke in Indigenous Populations of Countries With a Very High Human Development Index: A Systematic Review.

BACKGROUND AND OBJECTIVES: Cardiovascular disease contributes significantly to disease burden among many Indigenous populations. However, data on stroke incidence in Indigenous populations are sparse. We aimed to investigate what is known of stroke incidence in Indigenous populations of countries with a very high Human Development Index (HDI), locating the research in the broader context of Indigenous health. METHODS: We identified population-based stroke incidence studies published between 1990 and 2022 among Indigenous adult populations of developed countries using PubMed, Embase, and Global Health databases, without language restriction. We excluded non-peer-reviewed sources, studies with fewer than 10 Indigenous people, or not covering a 35- to 64-year minimum age range. Two reviewers independently screened titles, abstracts, and full-text articles and extracted data. We assessed quality using "gold standard" criteria for population-based stroke incidence studies, the Newcastle-Ottawa Scale for risk of bias, and CONSIDER criteria for reporting of Indigenous health research. An Indigenous Advisory Board provided oversight for the study. RESULTS: From 13,041 publications screened, 24 studies (19 full-text articles, 5 abstracts) from 7 countries met the inclusion criteria. Age-standardized stroke incidence rate ratios were greater in Aboriginal and Torres Strait Islander Australians (1.7-3.2), American Indians (1.2), Sámi of Sweden/Norway (1.08-2.14), and Singaporean Malay (1.7-1.9), compared with respective non-Indigenous populations. Studies had substantial heterogeneity in design and risk of bias. Attack rates, male-female rate ratios, and time trends are reported where available. Few investigators reported Indigenous stakeholder involvement, with few studies meeting any of the CONSIDER criteria for research among Indigenous populations. DISCUSSION: In countries with a very high HDI, there are notable, albeit varying, disparities in stroke incidence between Indigenous and non-Indigenous populations, although there are gaps in data availability and quality. A greater understanding of stroke incidence is imperative for informing effective societal responses to socioeconomic and health disparities in these populations. Future studies into stroke incidence in Indigenous populations should be designed and conducted with Indigenous oversight and governance to facilitate improved outcomes and capacity building. REGISTRATION INFORMATION: PROSPERO registration: CRD42021242367.

Health insurance coverage among American Indians and Alaska Natives in the context of the Affordable Care Act.

Objectives: American Indians and Alaska Natives (AI/AN) have a unique healthcare system uniquely interwoven with the Affordable Care Act (ACA). The aim of this study is to document changes in health insurance among AI/AN adults before and after implementation of the ACA.Design: We used data from the American Community Survey from 2008 to 2016 to examine trends in health insurance. We compared to Non-Hispanic Whites and stratified AI/AN adults with and without Indian Health Service (IHS) coverage. We used multivariate regression to evaluate the probability of health insurance post-ACA and included time period and subgroup interaction terms.Results: Public and private health insurance coverage increased post-ACA by 3.17 and 1.24 percentage points, respectively, but the percent uninsured remained high (37.7% of those with IHS coverage and 19.2% of those without). AI/AN in Medicaid Expansion states had a significantly greater percentage point (pp) increase in public insurance (6.31 pp, 95% CI 5.04-7.59) than AI/AN in non-expansion states (p < 0.001). There was a greater increase in private coverage among AI/AN without IHS compared to AI/AN with IHS coverage (p = 0.002).Conclusions: Despite improvements in healthcare insurance coverage for AI/AN, substantial disparities remain. The improvements appeared to be largely driven by Medicaid Expansion. Without specific considerations for AI/AN, future healthcare reforms could intensify health injustices and inequities they face.

The Incidence of Stroke in Indigenous Populations of Countries With a Very High Human Development Index: A Systematic Review Protocol.

Background and Aims: Despite known Indigenous health and socioeconomic disadvantage in countries with a Very High Human Development Index, data on the incidence of stroke in these populations are sparse. With oversight from an Indigenous Advisory Board, we will undertake a systematic review of the incidence of stroke in Indigenous populations of developed countries or regions, with comparisons between Indigenous and non-Indigenous populations of the same region, though not between different Indigenous populations. Methods: Using PubMed, OVID-EMBASE, and Global Health databases, we will examine population-based incidence studies of stroke in Indigenous adult populations of developed countries published 1990-current, without language restriction. Non-peer-reviewed sources, studies including <10 Indigenous People, or with insufficient data to determine incidence, will be excluded. Two reviewers will independently validate the search strategies, screen titles and abstracts, and record reasons for rejection. Relevant articles will undergo full-text screening, with standard data extracted for all studies included. Quality assessment will include Sudlow and Warlow's criteria for population-based stroke incidence studies, the Newcastle-Ottawa Scale for risk of bias, and the CONSIDER checklist for Indigenous research. Results: Primary outcomes include crude, age-specific and/or age-standardized incidence of stroke. Secondary outcomes include overall stroke rates, incidence rate ratio and case-fatality. Results will be synthesized in figures and tables, describing data sources, populations, methodology, and findings. Within-population meta-analysis will be performed if, and where, methodologically sound and comparable studies allow this. Conclusion: We will undertake the first systematic review assessing disparities in stroke incidence in Indigenous populations of developed countries. Data outputs will be disseminated to relevant Indigenous stakeholders to inform public health and policy research.

Integration of the preventive medicine specialty in the rural and Tribal public health workforce.

The majority of the U.S. American Indian and Alaska Native (AI/AN) population live in rural areas, and are thus disproportionately affected by rural health issues. In addition, the AI/AN population has unique health characteristics resulting from a distinct cultural and sociopolitical history. A public health approach to both rural and Tribal health should include the medical specialty of preventive medicine, a unique physician specialty that combines both direct patient care and public health skills. To best prepare preventive medicine physicians for rural and Tribal practice, medical schools could recruit students from rural and Tribal areas and encourage them to pursue the specialty of preventive medicine. Additionally, preventive medicine residency training programs could establish clinical and public health practicum rotations in rural and Tribal areas, and develop curricula that address rural and Tribal health issues. Currently very few preventive medicine residency programs expressly state a mission to train physicians in rural or Tribal settings.

Disparities in Risk Factors and Birth Outcomes Among American Indians in North Dakota.

Objectives High infant mortality rates among American Indians in North Dakota contribute to a 20-year gap in average age at death compared to whites. Geographic- and race-specific health disparities data to drive policy making and interventions are not well disseminated. The current study examines prenatal risk factors and birth outcomes between American Indian and whites in North Dakota. Methods A retrospective descriptive analysis of North Dakota live births from 2007 to 2012 was conducted. Period prevalence and prevalence ratios were calculated. Results The infant mortality rate from 2010 to 2012 for infants born to American Indian women was 3.5 times higher than whites. Racial disparities existed in education, teen births, tobacco use during pregnancy, and breastfeeding initiation. Disparities widened for inadequate prenatal care, illegal drug use during pregnancy, and infant mortality from 2007-2009 to 2010-2012 and narrowed for sexually transmitted infections and alcohol use during pregnancy. Conclusions for Practice American Indians are disproportionately affected by poor pregnancy and birth outcomes in North Dakota. Future geographic-specific American Indian research is warranted to aid current and future public health interventions.