Recommendations for Modernizing a Culturally Grounded Substance Use Prevention Program for American Indian and Alaska Native Youth.

American Indian and Alaska Native (AI/AN) youth use alcohol and drugs at a higher rate with earlier onset than the overall youth population in the United States. Youth interventions are needed to support the prevention and reduction of substance misuse-related issues. Connecting AI/AN children to their heritage through culturally grounded prevention programs has been shown to be more effective than programs designed for the general population. The objective of this formative evaluation was to provide community-informed updates for an existing culturally grounded substance use prevention program, The Beauty Way. This study was conducted in partnership with an AI/AN-serving community organization using key informant interviews and talking circles with community members and parents. Participants revealed the challenges and obstacles AI/AN youth face, the impact of cultural values, and activities which engage youth to prevent problematic substance use. Recommendations include the importance of 1) incorporating current challenges to behavioral health such as social media and vaping, 2) including cultural values and activities including land-based learning, and 3) creating a robust facilitator guide and hiring culturally sensitive program staff. These results generated recommendations to strengthen the cultural focus and application of The Beauty Way for AI/AN youth.

Effect of Sodium-Glucose Cotransporter 2 Inhibitors in Adults With Congenital Heart Disease.

BACKGROUND: Heart failure (HF) is the principal cause of morbidity and mortality in adults with congenital heart disease (ACHD). Robust evidence-based treatment options are lacking. OBJECTIVES: This study aims to evaluate the safety, tolerability, and short-term HF-related effects of sodium-glucose cotransporter 2 inhibitors (SGLT2i) in a real-world ACHD population. METHODS: All patients with ACHD treated with SGLT2i in 4 European ACHD centers were included in this retrospective study. Data were collected from 1 year before starting SGLT2i to the most recent follow-up. Data on side effects, discontinuation, mortality, and hospitalizations were collected. RESULTS: In total, 174 patients with ACHD were treated with SGLT2i from April 2016 to July 2023. The mean age was 48.7 ± 15.3 years, 72 (41.4%) were female, and 29 (16.7%) had type 2 diabetes mellitus. Ten (5.7%) patients had mild, 75 (43.1%) moderate, and 89 (51.1%) severe congenital heart disease. HF was the most frequent starting indication (n = 162, 93.1%), followed by type 2 diabetes (n = 11, 6.3%) and chronic kidney disease (n = 1, 0.6%). At median follow-up of 7.7 months (Q1-Q3: 3.9-13.2 months), 18 patients (10.3%) reported side effects, 12 (6.9%) permanently discontinued SGLT2i, and 4 (2.3%) died of SGLT2i-unrelated causes. A significant reduction in the HF hospitalization rate was observed from 6 months before to 6 months after starting SGLT2i (relative rate = 0.30; 95% CI: 0.14-0.62; P = 0.001). CONCLUSIONS: SGLT2i generally seem safe, well-tolerated, and potentially beneficial in patients with ACHD. SGLT2i was associated with a 3-fold reduction in the 6-month HF hospitalization rate. These results warrant prospective randomized investigation of the potential benefits of SGLT2i for patients with ACHD.

A retrospective observational study of vCare: a virtual emergency clinical advisory and transfer service in rural and remote Australia.

BACKGROUND: Provision of critical care in rural areas is challenging due to geographic distance, smaller facilities, generalist skill mix and population characteristics. Internationally, the amalgamation telemedicine and retrieval medicine services are developing to overcome these challenges. Virtual emergency clinical advisory and transfer service (vCare) is one of these novel services based in New South Wales, Australia. We aim to describe patient encounters with vCare from call initiation at the referring site to definitive care at the accepting site. METHODS: This retrospective observational study reviewed all patients using vCare in rural and remote Australia for clinical advice and/or inter-hospital transfer for higher level of care between February and March 2021. Data were extracted from electronic medical records and included remoteness of sites, presenting complaint, triage category, camera use, patient characteristics, transfer information, escalation of therapeutic intervention and outcomes. Data were summarised using cross tabulation. RESULTS: 1,678 critical care patients were supported by vCare, with children (12.5%), adults (50.6%) and older people (36.9%) evenly split between sexes. Clinicians mainly referred to vCare for trauma (15.1%), cardiac (16.1%) and gastroenterological (14.8%) presentations. A referral to vCare led to an escalation of invasive intervention, skill, and resources for patient care. vCare cameras were used in 19.8% of cases. Overall, 70.5% (n = 1,139) of patients required transfer. Of those, 95.1% were transferred to major regional hospitals and 11.7% required secondary transfer to higher acuity hospitals. Of high-urgency referrals, 42.6% did not receive high priority transport. Imaging most requested included CT and MRI scans (37.2%). Admissions were for physician (33.1%) and surgical care (23.3%). The survival rate was 98.6%. CONCLUSION: vCare was used by staff in rural and remote facilities to support decision making and care of patients in a critical condition. Issues were identified including low utilisation of equipment, heavy reliance on regional sites and high rates of secondary transfer. However, these models are addressing a key gap in the health workforce and supporting rural and remote communities to receive care.

Understanding Resilience and Mental Well-Being in Southwest Indigenous Nations and the Impact of COVID-19: Protocol for a Multimethods Study.

BACKGROUND: Despite experiencing many adversities, American Indian and Alaska Native populations have demonstrated tremendous resilience during the COVID-19 pandemic, drawing upon Indigenous determinants of health (IDOH) and Indigenous Nation Building. OBJECTIVE: Our multidisciplinary team undertook this study to achieve two aims: (1) to determine the role of IDOH in tribal government policy and action that supports Indigenous mental health and well-being and, in turn, resilience during the COVID-19 crisis and (2) to document the impact of IDOH on Indigenous mental health, well-being, and resilience of 4 community groups, specifically first responders, educators, traditional knowledge holders and practitioners, and members of the substance use recovery community, working in or near 3 Native nations in Arizona. METHODS: To guide this study, we developed a conceptual framework based on IDOH, Indigenous Nation Building, and concepts of Indigenous mental well-being and resilience. The research process was guided by the Collective benefit, Authority to control, Responsibility, Ethics (CARE) principles for Indigenous Data Governance to honor tribal and data sovereignty. Data were collected through a multimethods research design, including interviews, talking circles, asset mapping, and coding of executive orders. Special attention was placed on the assets and culturally, socially, and geographically distinct features of each Native nation and the communities within them. Our study was unique in that our research team consisted predominantly of Indigenous scholars and community researchers representing at least 8 tribal communities and nations in the United States. The members of the team, regardless of whether they identified themselves as Indigenous or non-Indigenous, have many collective years of experience working with Indigenous Peoples, which ensures that the approach is culturally respectful and appropriate. RESULTS: The number of participants enrolled in this study was 105 adults, with 92 individuals interviewed and 13 individuals engaged in 4 talking circles. Because of time constraints, the team elected to host talking circles with only 1 nation, with participants ranging from 2 to 6 in each group. Currently, we are in the process of conducting a qualitative analysis of the transcribed narratives from interviews, talking circles, and executive orders. These processes and outcomes will be described in future studies. CONCLUSIONS: This community-engaged study lays the groundwork for future studies addressing Indigenous mental health, well-being, and resilience. Findings from this study will be shared through presentations and publications with larger Indigenous and non-Indigenous audiences, including local recovery groups, treatment centers, and individuals in recovery; K-12 and higher education educators and administrators; directors of first responder agencies; traditional medicine practitioners; and elected community leaders. The findings will also be used to produce well-being and resilience education materials, in-service training sessions, and future recommendations for stakeholder organizations. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/44727.

Using the Community Readiness Model to Assess American Indian Communities Readiness to Address Cancer Prevention and Control Programs.

Cancer disparities continue among American Indian and Alaska Native (AI/AN) populations while they have decreased among other racial and ethnic groups. No studies were found that utilized the Community Readiness Model (CRM) to ascertain the readiness of Tribal and American Indian organizations to participate in cancer research and cancer prevention and control initiatives. The Partnership for Native American Cancer Prevention conducted an assessment of the status of American Indian communities' readiness to implement activities for prevention, early detection, and treatment to improve AI/AN cancer rates. The assessment was a component of the Community Outreach Core of the grant. Thirty-four key Informants participated in the interview process. The Community Readiness Assessment (CRA) provided a baseline assessment of community partners' readiness to participate in cancer research and programming. Despite years of cancer intervention programs, the communities were classified as being in the early stages of readiness [1-5] of the nine-stage model. Additionally, findings showed low levels of awareness of previous or ongoing cancer research. The findings in prevention and control efforts indicated a need for technical assistance and funding to support community projects in prevention and control. This supported the implementation of a community grants initiative. They also indicated that communities were not ready to conduct research, despite ongoing cancer related research in at least two communities. Communication tools and social media methods and messages were developed to increase awareness of cancer as a health concern and cancer research in the community. The CRM informed these and other engagement activities to meet the appropriate stage of readiness for each Tribe/community, and to build their capacity to participate in cancer research and programming activities.

Between Two Worlds: Impacts of COVID-19 on the AI/AN Health Research Workforce.

The COVID-19 pandemic has had devastating global and national impacts including major loss of life, economic downturns, and ongoing impairments to mental and physical health. Conducting health research has remained a priority and has helped mitigate some of the COVID-19 devastation; however, challenges to research have arisen due to COVID-19 prevention strategies and changing community priorities for research. The purpose of this article is to focus on a critical piece of the health research process with American Indian and Alaska Native (AI/AN) communities and the AI/AN health research workforce. Throughout this editorial, we provide challenges faced while conducting research with AI/AN communities during the COVID-19 pandemic including changes to research processes and ongoing research studies, taking on multiple roles in academic spaces, and mourning for continuous community loss while continuing to conduct research that may benefit AI/AN communities. Using a strengths-based lens, we also provide examples of flexibility, adaptation, and resilience in the face of the ongoing COVID-19 pandemic.

Development of a Semiautomated Database for Patients With Adult Congenital Heart Disease.

BACKGROUND: Databases for Congenital Heart Disease (CHD) are effective in delivering accessible datasets ready for statistical inference. Data collection hitherto has, however, been labour and time intensive and has required substantial financial support to ensure sustainability. We propose here creation and piloting of a semiautomated technique for data extraction from clinic letters to populate a clinical database. METHODS: PDF formatted clinic letters stored in a local folder, through a series of algorithms, underwent data extraction, preprocessing, and analysis. Specific patient information (diagnoses, diagnostic complexity, interventions, arrhythmia, medications, and demographic data) was processed into text files and structured data tables, used to populate a database. A specific data validation schema was predefined to verify and accommodate the information populating the database. Unsupervised learning in the form of a dimensionality reduction technique was used to project data into 2 dimensions and visualize their intrinsic structure in relation to the diagnosis, medication, intervention, and European Society of Cardiology classification lists of disease complexity. Ninety-three randomly selected letters were reviewed manually for accuracy. RESULTS: There were 1409 consecutive outpatient clinic letters used to populate the Scottish Adult Congenital Cardiac Database. Mean patient age was 35.4 years; 47.6% female; with 698 (49.5%) having moderately complex, 369 (26.1%) greatly complex, and 284 (20.1%) mildly complex lesions. Individual diagnoses were successfully extracted in 96.95%, and demographic data were extracted in 100% of letters. Data extraction, database upload, data analysis and visualization took 571 seconds (9.51 minutes). Manual data extraction in the categories of diagnoses, intervention, and medications yielded accuracy of the computer algorithm in 94%, 93%, and 93%, respectively. CONCLUSIONS: Semiautomated data extraction from clinic letters into a database can be achieved successfully with a high degree of accuracy and efficiency.

Centering Indigenous Knowledges and Worldviews: Applying the Indigenist Ecological Systems Model to Youth Mental Health and Wellness Research and Programs.

Globally, Indigenous communities, leaders, mental health providers, and scholars have called for strengths-based approaches to mental health that align with Indigenous and holistic concepts of health and wellness. We applied the Indigenist Ecological Systems Model to strengths-based case examples of Indigenous youth mental health and wellness work occurring in CANZUS (Canada, Australia, New Zealand, and United States). The case examples include research, community-led programs, and national advocacy. Indigenous youth development and well-being occur through strengths-based relationships across interconnected environmental levels. This approach promotes Indigenous youth and communities considering complete ecologies of Indigenous youth to foster their whole health, including mental health. Future research and programming will benefit from understanding and identifying common, strengths-based solutions beyond narrow intervention targets. This approach not only promotes Indigenous youth health and mental health, but ripples out across the entire ecosystem to promote community well-being.

Hepatosteatosis and Atherosclerotic Plaque at Coronary CT Angiography.

Purpose: To assess the association between nonalcoholic fatty liver disease (NAFLD) and quantitative atherosclerotic plaque at CT. Materials and Methods: In this post hoc analysis of the prospective Scottish Computed Tomography of the HEART trial (November 2010 to September 2014), hepatosteatosis and coronary artery calcium score were measured at noncontrast CT. Presence of stenoses, visually assessed high-risk plaque, and quantitative plaque burden were assessed at coronary CT angiography. Multivariable models were constructed to assess the impact of hepatosteatosis and cardiovascular risk factors on coronary artery disease. Results: Images from 1726 participants (mean age, 58 years ± 9 [SD]; 974 men) were included. Participants with hepatosteatosis (155 of 1726, 9%) had a higher body mass index, more hypertension and diabetes mellitus, and higher cardiovascular risk scores (P < .001 for all) compared with those without hepatosteatosis. They had increased coronary artery calcium scores (median, 43 Agatston units [AU] [interquartile range, 0-273] vs 19 AU [0-225], P = .046), more nonobstructive disease (48% vs 37%, P = .02), and higher low-attenuation plaque burden (5.11% [0-7.16] vs 4.07% [0-6.84], P = .04). However, these associations were not independent of cardiovascular risk factors. Over a median of 4.7 years, there was no evidence of a difference in myocardial infarction between those with and without hepatosteatosis (1.9% vs 2.4%, P = .92). Conclusion: Hepatosteatosis at CT was associated with an increased prevalence of coronary artery disease at CT, but this was not independent of the presence of cardiovascular risk factors.Keywords: CT, Cardiac, Nonalcoholic Fatty Liver Disease, Coronary Artery Disease, Hepatosteatosis, Plaque QuantificationClinical trial registration no. NCT01149590 Supplemental material is available for this article. © RSNA, 2022See also commentary by Abohashem and Blankstein in this issue.

Pericoronary Adipose Tissue Attenuation, Low-Attenuation Plaque Burden, and 5-Year Risk of Myocardial Infarction.

BACKGROUND: Pericoronary adipose tissue (PCAT) attenuation and low-attenuation noncalcified plaque (LAP) burden can both predict outcomes. OBJECTIVES: This study sought to assess the relative and additive values of PCAT attenuation and LAP to predict future risk of myocardial infarction. METHODS: In a post hoc analysis of the multicenter SCOT-HEART (Scottish Computed Tomography of the Heart) trial, the authors investigated the relationships between the future risk of fatal or nonfatal myocardial infarction and PCAT attenuation measured from coronary computed tomography angiography (CTA) using multivariable Cox regression models including plaque burden, obstructive coronary disease, and cardiac risk score (incorporating age, sex, diabetes, smoking, hypertension, hyperlipidemia, and family history). RESULTS: In 1,697 evaluable participants (age: 58 ± 10 years), there were 37 myocardial infarctions after a median follow-up of 4.7 years. Mean PCAT was -76 ± 8 HU and median LAP burden was 4.20% (IQR: 0%-6.86%). PCAT attenuation of the right coronary artery (RCA) was predictive of myocardial infarction (HR: 1.55; P = 0.017, per 1 SD increment) with an optimum threshold of -70.5 HU (HR: 2.45; P = 0.01). In multivariable analysis, adding PCAT-RCA of ≥-70.5 HU to an LAP burden of >4% (the optimum threshold for future myocardial infarction; HR: 4.87; P < 0.0001) led to improved prediction of future myocardial infarction (HR: 11.7; P < 0.0001). LAP burden showed higher area under the curve compared to PCAT attenuation for the prediction of myocardial infarction (AUC = 0.71 [95% CI: 0.62-0.80] vs AUC = 0.64 [95% CI: 0.54-0.74]; P < 0.001), with increased area under the curve when the 2 metrics are combined (AUC = 0.75 [95% CI: 0.65-0.85]; P = 0.037). CONCLUSION: Coronary CTA-defined LAP burden and PCAT attenuation have marked and complementary predictive value for the risk of fatal or nonfatal myocardial infarction.

Participation in a Culturally Grounded Program Strengthens Cultural Identity, Self-esteem, and Resilience in Urban Indigenous Adolescents.

Culturally grounded after-school programs (ASPs) aim to promote health and well-being among Indigenous youth. Native Spirit is a 10-session ASP that focuses on local cultural values and activities facilitated by local cultural practitioners. This pilot study used a single group, pretest-posttest design (N = 18) with Indigenous adolescents in grades 7-12 and conducted participant interviews (N = 11) to assess the impact of the program on cultural identity, self-esteem, and resilience. There were immediate post-program increases in mean strength in cultural identity (p = 0.002), resilience (p = 0.161), and self-esteem (p = 0.268). Themes related to benefits of program participation included curiosity and commitment to cultural identity, increases in self-esteem, and ability to build resilience. This study provides new insights on the relationship between cultural engagement and adolescent health.

Native Spirit: Development of a culturally grounded after-school program to promote well-being among American Indian adolescents.

Culturally grounded after-school programs (ASPs), based on local cultural values and practices, are often developed and implemented by and for the local community. Culturally grounded programs promote health and well-being for American Indian and Alaska Native (AI/AN) adolescents by allowing them to reconnect to cultural teachings that have faced attempted historical and contemporary erasure. This article is a first-person account that describes the development and implementation of a culturally grounded ASP, Native Spirit (NS), for AI adolescents (grades 7-12) living on a Southwest urban-based reservation. NS, a 13-session culturally grounded ASP, was developed by an academic-community partnership that focuses on increasing cultural engagement as a form of positive youth development. Each session was guided by one to two local cultural practitioners and community leaders. The development of the NS program contributed to an Indigenous prevention science that emphasizes the positive impacts of Indigenous culture and community on health and well-being. The use of the ASP format, in partnership with the Boys & Girls Club, increased the feasibility of dissemination and refinement of the NS program by tribal communities and organizations.

Association of coronary artery calcium score with qualitatively and quantitatively assessed adverse plaque on coronary CT angiography in the SCOT-HEART trial.

AIMS: Coronary artery calcification is a marker of cardiovascular risk, but its association with qualitatively and quantitatively assessed plaque subtypes is unknown. METHODS AND RESULTS: In this post-hoc analysis, computed tomography (CT) images and 5-year clinical outcomes were assessed in SCOT-HEART trial participants. Agatston coronary artery calcium score (CACS) was measured on non-contrast CT and was stratified as zero (0 Agatston units, AU), minimal (1-9 AU), low (10-99 AU), moderate (100-399 AU), high (400-999 AU), and very high (≥1000 AU). Adverse plaques were investigated by qualitative (visual categorization of positive remodelling, low-attenuation plaque, spotty calcification, and napkin ring sign) and quantitative (calcified, non-calcified, low-attenuation, and total plaque burden; Autoplaque) assessments. Of 1769 patients, 36% had a zero, 9% minimal, 20% low, 17% moderate, 10% high, and 8% very high CACS. Amongst patients with a zero CACS, 14% had non-obstructive disease, 2% had obstructive disease, 2% had visually assessed adverse plaques, and 13% had low-attenuation plaque burden >4%. Non-calcified and low-attenuation plaque burden increased between patients with zero, minimal, and low CACS (P < 0.001), but there was no statistically significant difference between those with medium, high, and very high CACS. Myocardial infarction occurred in 41 patients, 10% of whom had zero CACS. CACS >1000 AU and low-attenuation plaque burden were the only predictors of myocardial infarction, independent of obstructive disease, and 10-year cardiovascular risk score. CONCLUSION: In patients with stable chest pain, zero CACS is associated with a good but not perfect prognosis, and CACS cannot rule out obstructive coronary artery disease, non-obstructive plaque, or adverse plaque phenotypes, including low-attenuation plaque.

Case Report: Ocular Manifestation of Mantle Cell Lymphoma.

SIGNIFICANCE: Mantle cell lymphoma (MCL) is a rare lymphoma that can present even more rarely in the orbit. Diagnosis, differentiation, and systemic treatment with the help of an oncologist are necessary for improved prognosis. Eye care providers must be vigilant when addressing ocular findings to determine next steps. PURPOSE: We present a case of presumed orbital fat prolapse confirmed as MCL found on routine eye examination. CASE REPORT: A 72-year-old White man presented for an annual comprehensive eye examination and was found to have conjunctival elevation in the superior and inferior fornices bilaterally. The patient had stable lymphadenopathy on positron emission tomography/computed tomography imaging 1 week before presentation. Coupled with the patient's recent diagnosis of systemic MCL, there was high suspicion that the conjunctival lesions were malignant. Biopsy of the conjunctival lesion confirmed MCL. A reevaluation of the previous imaging with a neuroradiologist confirmed the presence of orbital lesions consistent with MCL. The patient responded to treatment with low-dose focal radiation therapy. CONCLUSIONS: Primary eye care providers should be aware of limitations of orbital imaging during routine positron emission tomography and computed tomography scans in those with MCL, and consultation with neuroradiology for image review may be useful if the clinical findings are suspicious.

A Patient With Recurrent Immune Stromal Keratitis and Adherence Challenges.

Background: Herpes simplex keratitis (HSK) is a common yet potentially blinding condition caused by a primary or reactivated herpetic infection of the cornea. Immune stromal keratitis (ISK), a type of HSK, is classified by a cellular and neovascularization infiltration of the cornea, and patients with ISK may experience low-grade chronic keratitis for years. Case Presentation: A 52-year-old man presented to the eye clinic complaining of a watery and itchy right eye with mildly blurred vision. With consultation from a corneal specialist, the patient was given the presumptive diagnosis of ISK in the right eye based on the unilateral corneal presentation and lack of corneal sensitivity. Conclusions: ISK presents unilaterally with decreased or absent corneal sensitivity and nonspecific symptoms. It should be at the top of the list in the differential diagnosis in any patient with unilateral corneal edema, opacification, or neovascularization, and the patient should be started on oral antiviral therapy.

Neutralisation of SARS-CoV-2 by anatomical embalming solutions.

Teaching and learning anatomy by using human cadaveric specimens has been a foundation of medical and biomedical teaching for hundreds of years. Therefore, the majority of institutions that teach topographical anatomy rely on body donation programmes to provide specimens for both undergraduate and postgraduate teaching of gross anatomy. The COVID-19 pandemic has posed an unprecedented challenge to anatomy teaching because of the suspension of donor acceptance at most institutions. This was largely due to concerns about the potential transmissibility of the SARS-CoV-2 virus and the absence of data about the ability of embalming solutions to neutralise the virus. Twenty embalming solutions commonly used in institutions in the United Kingdom and Ireland were tested for their ability to neutralise SARS-CoV-2, using an established cytotoxicity assay. All embalming solutions tested neutralised SARS-CoV-2, with the majority of solutions being effective at high-working dilutions. These results suggest that successful embalming with the tested solutions can neutralise the SARS-CoV-2 virus, thereby facilitating the safe resumption of body donation programmes and cadaveric anatomy teaching.

Design, development and implementation of the virtual, coordination, access, referral and escalation service in western New South Wales.

PROBLEM: People in rural and remote New South Wales experience avoidable admissions, limited access to skilled clinicians and commonly travel >400 km to access specialist services within the district and >700 km for tertiary services outside. DESIGN: Iterative use of New South Wales Health redesign methodology in the period 2015-2020. SETTING: Western New South Wales Local Health District is geographically the largest Health District within New South Wales and includes disadvantaged communities. Virtual Coordination Access Referral Escalation is an audio-visually enabled transport, patient flow and clinical advice unit established in 2006 to support patients and clinicians at 35 small, rural and remote hospitals. KEY MEASURES FOR IMPROVEMENT: Right care, right place and right time by the right team the first time. Care delivery close to home and 'on country'. Safe and cost-effective transport. Performance measures to support quality, safety and clinical outcomes. Improving the human experience. STRATEGIES FOR CHANGE: Cycles of strategic planning, innovation, productive partnerships, change management and human systems development. EFFECTS OF CHANGE: Virtual Coordination Access Referral Escalation critical care telehealth more effectively supports rural and remote health care across large distances. LESSONS LEARNT: Improvements include expanded/redefined management and nursing roles, integration of dedicated critical care emergency medicine specialists within the service, delegated authority to accept transfers, upgraded technology, 24-hour service provision and a central 'Virtual Support' proactive outreach model.

Sex-Specific Computed Tomography Coronary Plaque Characterization and Risk of Myocardial Infarction.

OBJECTIVES: This study was designed to investigate whether coronary computed tomography angiography assessments of coronary plaque might explain differences in the prognosis of men and women presenting with chest pain. BACKGROUND: Important sex differences exist in coronary artery disease. Women presenting with chest pain have different risk factors, symptoms, prevalence of coronary artery disease and prognosis compared to men. METHODS: Within a multicenter randomized controlled trial, we explored sex differences in stenosis, adverse plaque characteristics (positive remodeling, low-attenuation plaque, spotty calcification, or napkin ring sign) and quantitative assessment of total, calcified, noncalcified and low-attenuation plaque burden. RESULTS: Of the 1,769 participants who underwent coronary computed tomography angiography, 772 (43%) were female. Women were more likely to have normal coronary arteries and less likely to have adverse plaque characteristics (p < 0.001 for all). They had lower total, calcified, noncalcified, and low-attenuation plaque burdens (p < 0.001 for all) and were less likely to have a low-attenuation plaque burden >4% (41% vs. 59%; p < 0.001). Over a median follow-up of 4.7 years, myocardial infarction (MI) occurred in 11 women (1.4%) and 30 men (3%). In those who had MI, women had similar total, noncalcified, and low-attenuation plaque burdens as men, but men had higher calcified plaque burden. Low-attenuation plaque burden predicted MI (hazard ratio: 1.60; 95% confidence interval: 1.10 to 2.34; p = 0.015), independent of calcium score, obstructive disease, cardiovascular risk score, and sex. CONCLUSIONS: Women presenting with stable chest pain have less atherosclerotic plaque of all subtypes compared to men and a lower risk of subsequent MI. However, quantitative low-attenuation plaque is as strong a predictor of subsequent MI in women as in men. (Scottish Computed Tomography of the HEART Trial [SCOT-HEART]; NCT01149590).