American Groups Research Articles

Familial and Individual Risk Factors, Sexual Assault, and Mental Health: A Comparison of Black, Hispanic, Asian, and White College Students.

Though sexual assault is prevalent among college campuses, there is a paucity of research on whether risk factors vary for different racial/ethnic groups. As such, this article examines familial and individual risk factors and three sexual assault types (coercive, physically forced, and incapacitated) with depressive symptoms and post-traumatic stress disorder (PTSD) symptoms to see whether such risks vary for Black/African American, White, Asian, and Hispanic groups of college students. Data were gathered in 2019 to 2020 from 783 undergraduate college women and men at a large public university in the Midwestern United States. Results revealed that in terms of family background, Black/African American, Asian, and Hispanic students reported more experiences of child physical abuse and lower levels of warmth and support compared to White students. White college students, however, reported more frequent heavy drinking compared to Asian and Hispanic students. For sexual assault, Asian students reporting experiencing incapacitated sexual assault more so than White students, whereas Black/African American students reported experiences of physically forced sexual assault more so than White students. For mental health, Hispanic students reported more PTSD symptoms compared to White students while Asian students reported more depressive symptoms compared to their White counterparts. It is noteworthy that early experiences of child physical abuse and lower warmth and support continued to significantly impact both PTSD symptoms and depressive symptoms. Our results demonstrate the importance of going beyond the typical dichotomy of White and non-White to gain a more nuanced understanding of how risk factors vary for different racial and ethnic groups, which has implications for intervention and prevention when understanding sexual assault and mental health outcomes.

What Would Sakharov Say? The Americanization of Andrei Sakharov

During the 1970s and 1980s, American scientists rallied to defend Andrei Sakharov, a Soviet physicist punished for his advocacy of human rights. In the United States, Americans of all political persuasions admired Sakharov’s courage, though they expressed it in different ways. To some, his life inspired a pursuit of social change, while others saw his plight as confirmation of the evils of Soviet communism. More than anything, though, Sakharov’s moral authority was a highly sought and politically useful prize. Scholars assessing the campaign to save Sakharov have noted divisions within the movement over effort and tactics, but as this paper argues, the movement was, during Sakharov's life and after, a political struggle among various Americans groups to claim his mantle as their own.

The unappreciated centrality of ethnoracially mixed Americans to the nation’s demographic future

The ethnoracial future of the United States has been framed as a demographic binary: Whites vs. people of color. The argument here is that this binary distorts by failing to take into adequate account the rapidly growing group of Americans who have been raised in mixed minority and White families, the great majority of the total mixed population. The members of this group generally have distinctive social characteristics: socioeconomic advantages compared to minorities and social integration into milieus with many Whites, as revealed by relatively high rates of marriage to them. However, their identities often encompass their minority heritage. Accordingly, they straddle the society’s major ethnoracial fracture line, creating an in-between social space and connecting, through kinship and other close social relations, both of its sides. However, their numbers are distorted in public national population data, such as census data and population projections; and they are typically counted as part of the non-White population. The recently announced revision of the race/ethnic data standards for the census offers an opportunity to refashion public data in a way that illuminates the important role this mixed group is likely to play in the nation’s demographic future.

Cardiovascular risk factors and disease mortality among asian american subgroups

Abstract Background Asian Americans are the fastest growing racial group in the United States. Although Asian subgroups have distinct cardiovascular (CV) risk profiles, they are often aggregated together for public health surveillance. Purpose We provide the first comprehensive national estimates of CV and CV risk factor mortality in Asian American subgroups to assess differences in CV risk. Methods We used CDC WONDER, which captures all death certificates in the US (2018-2020), as well as the American Community Survey for demographic data. Adults aged ≥18 years were included. Estimates of age-adjusted overall CV mortality, as well as heart disease, hypertension, and stroke-related mortality, were determined by ICD-10 codes. To compare the contribution of each cause of mortality among subgroups with different baseline all-cause mortality rates, proportional mortality rates were determined by race. Proportional mortality was defined as the mortality rate of each condition divided by the all-cause mortality for that race group. Differences in proportional mortality by race and ethnicity, compared with White American adults, were assessed with age-sex adjusted linear regression. Results The US population consisted of 12,950,565 Asian Americans (53.7% female). Among the Asian American subgroups, 25.4% were Asian Indian, 28.5% Chinese, 19.7% Filipino, 5.3% Japanese, 9.6% Korean, and 11.8% Vietnamese. A total of 160,282,147 adults were White. Age-adjusted baseline mortality rates are shown in the Table. Compared with White adults, Asian Indian (34.5% vs 29.3%; adjusted difference 5.2%, [95% CI: 1.8%, 8.6%], P=0.009) and Filipino (32.8% vs 29.3%; adjusted difference 3.5%, [95% CI: 0.1%, 6.9%], P=0.04) adults had significantly higher proportional mortality from all CV causes. Asian Indian (26.0% vs 22.6%; adjusted difference 3.2%, [95% CI: 0.3%, 6.2%], P=0.04) adults had higher proportional mortality from heart disease than White adults, while Korean (17.3% vs 22.6%; adjusted difference -5.2%, [95% CI: -8.1%, -2.2%], P=0.01) and Vietnamese (17.5% vs 22.6%; adjusted difference -5.1%, [95% CI: -8.0%, -2.1%], P=0.01) adults had lower proportional mortality. Every Asian American subgroup had higher proportional mortality from hypertension causes compared with White adults, except for Asian Indians (Figure). In addition, every Asian American subpopulation had higher proportional mortality from stroke compared with White adults (Figure). Conclusions CV risk factor and disease-related mortality varies substantially among Asian American subgroups. Public health efforts targeted to address CV health disparities among the diverse group of Asian Americans are needed.

Did Biden-Harris’s reforms on the Paycheck Protection Program reduce racial disparities in lending?

AbstractIntroduced under the Trump-Pence Administration, the Paycheck Protection Program (PPP) provided short-term relief loans to small American businesses during the peak of the Coronavirus pandemic. The initial design of the PPP faced significant criticism from researchers due to racial disparities, among other issues, in its lending process. Minority groups received smaller PPP loan amounts during the original two tranches released in 2020. To increase equitable access for all, in February 2021 the Biden-Harris Administration enforced swift changes to the initial PPP aimed at favouring access to PPP loans for minority-owned small businesses that had been disadvantaged by the program’s original design under the Trump-Pence Administration. By exploiting a granular dataset of 1,759,270 PPP loans granted between Q2 2020 and Q2 2021 and by implementing a difference-in-differences approach (DID), this paper provides novel evidence on the effectiveness of the Biden reforms in reducing racial disparities within the Paycheck Protection Program. Indeed, we observe a significant increase in the volume of PPP loans granted to minority-owned businesses in the period following the Biden-Harris Administration’s reforms. Furthermore, among different minority groups, the reforms appear most effective for Native American minority groups (including American Indians, Alaska Natives, Native Hawaiians and/or Other Pacific Islanders), followed by Black Americans and Asian business owners. Our findings offer novel contributions to the existing literature on institutional discrimination, particularly regarding the initial PPP design. Our findings are especially valuable for policy makers as they underscore the importance of radical changes in addressing racial disparities. Our paper also offers evidence of how a public credit guarantee program should be designed to empower and promote economic inclusion for all, regardless of ethnicity, aligning with the UN’s Sustainable Development Goals.

Networks between Ireland and the Irish American Diaspora during the Northern Ireland Peace Process

Abstract This article explores the complex relationship between the network of actors in the United States and Ireland who sought to influence American foreign policy in the Northern Ireland peace process. These networks operated in civil society, representing numerous Irish American organizations linking corporate and church leaders and the media to members of the Irish American diaspora in government to influence the United States’ diplomacy. These Irish American groups and individuals interested in influencing events in Northern Ireland were linked with a wide array of governmental and non-governmental actors in Ireland. Often, Americans were quite deferential to leaders and groups in Ireland and Northern Ireland who sought to mobilize the Irish diaspora in the United States for their cause. Thus, the United States’ role in Ireland and Northern Ireland was not that of a hegemonic power but one of an empathetic actor responding to developments and cues provided by various actors in the Irish context. Transatlantic networking, made more possible due to technological changes in communication and transportation, facilitated increased exchanges of ideas, agents, and information. These networks allowed groups across the Atlantic to elicit support for local groups in Northern Ireland and mobilize the US government to play a political and diplomatic role in the conflict and peace process. Ultimately, the majority of Irish Americans moved from supporting the nationalist/republican side in the early years of the Troubles to becoming strong supporters of the peace process in the 1990s.

In the Midst of the Collective: The Experience and Influence of African American Peer Groups in Graduate School at Predominantly White Institutions

In the Midst of the Collective: The Experience and Influence of African American Peer Groups in Graduate School at Predominantly White Institutions

Alzheimer Dementia Among Individuals With Down Syndrome

With the advancement in administrative data as a research tool and the reliance on public health insurance for individuals with Down syndrome, population-level trends in Alzheimer dementia in this population are beginning to be understood. To comprehensively describe the epidemiology of Alzheimer dementia in adults with Down syndrome in a full US Medicare and Medicaid sample. This cohort study included 132 720 adults aged 18 years or older with Medicaid and/or Medicare claims data with an International Statistical Classification of Diseases and Related Health Problems code for Down syndrome. Data were collected from January 1, 2011, to December 31, 2019, and analyzed from August 2023 to May 2024. The main outcome was prevalence of Alzheimer dementia in each calendar year and during the 9-year period. Alzheimer dementia incidence rates by calendar year and age and stratified for race or ethnicity as well as time to death after Alzheimer dementia diagnosis were also assessed. There were 132 720 unique adults with Down syndrome from 2011 to 2019: 79 578 (53.2%) were male, 17 090 (11.7%) were non-Hispanic Black, 20 777 (15.7%) were Hispanic, 101 120 (68.8%) were non-Hispanic White, and 47 692 (23.3%) had ever had an Alzheimer dementia diagnosis. Incidence was 22.4 cases per 1000 person-years. The probability of an incident Alzheimer dementia diagnosis over 8 years was 0.63 (95% CI, 0.62-0.64) for those entering the study between ages 55 to 64 years. Mean (SD) age at incident diagnosis was 54.5 (7.4) years and median (IQR) age was 54.6 (9.3) years. Mean (SD) age at death among those with Alzheimer dementia was 59.2 (6.9) years (median [IQR], 59.0 [8.0] years). The mean (SD) age at onset for the Hispanic group was 54.2 (9.2) years, 52.4 (7.8) years for the American Indian or Alaska Native group, and 52.8 (8.2) years for the mixed race groups compared with 55.0 (7.8) years for the White non-Hispanic group. For age at death, there were no differences by sex. The mean (SD) age at death was later for the White non-Hispanic group (59.3 [6.8] years) compared with the Hispanic group (58.5 [7.8] years), Native American group (57.8 [7.1] years), and mixed race group (58.2 [7.0] years). In this cohort study of adults with Down syndrome who were enrolled in Medicaid and Medicare, Alzheimer dementia occurred at high rates. Consistency with clinical studies of dementia in Down syndrome supports the use of administrative data in Down syndrome-Alzheimer dementia research.

Abstract A161: Racial and ethnic differences in receipt of guideline-recommended hepatocellular carcinoma surveillance in a high Risk, diverse primary care patient population: A study in two large integrated healthcare systems in California and Hawai‘i

Abstract Guideline-recommended ultrasounds for hepatocellular carcinoma (HCC) surveillance target patients with cirrhosis and certain liver conditions, yet uptake remains low, particularly among racial/ethnic minority groups. Underuse may be attributed to factors at the patient, provider, healthcare system, and neighborhood levels. However, in-depth analyses identifying contributory factors are lacking. We investigated the presence of racial/ethnic disparities in receipt of recommended surveillance among high-risk patients as a retrospective analysis of electronic health record (EHR) data from Kaiser Permanente Hawai‘i (KPHI) and Sutter Health in California, both of which serve numerous Asian American, Hispanic, Native Hawaiian (NH), other Pacific Islander (PI), and multiracial/ethnic patients. We included patients with ≥1 in-person encounter (2000-2017), no history of liver cancer, and a clinical indication of surveillance eligibility (cirrhosis, chronic hepatitis B or C, or a high FIB-4 score ≥2.67) with a minimum EHR follow-up of 18 months post-eligibility. Recommended surveillance is biannual abdominal imaging (ultrasound, CT, MRI) or alpha-1 fetoprotein tests. We categorized eligible patients as 'ever surveilled' if conducted at least once during follow-up and by the proportion of follow-up time they were up-to-date with surveillance (PTUDS). The cohort includes 54,597 patients (9,488 from KPHI; 45,109 from Sutter); current results are for the KPHI subset only. Among N=9,488 patients (median age: 52; 46% female; 26% NHW, 14% NH, 11% Filipino, 10% multiracial/ethnic) median follow-up was 91 months and 82% were surveilled at least once, with a mean PTUDS of 14% (SD=19%) overall and 19% (SD=21%) among the surveilled. We used sex- and age-adjusted log-risk regression for risk ratio (RR) of ‘ever surveilled’ vs. not and linear regression for PTUDS; NHW is the reference group in all models. We found that NH (RR=0.96, 95%CI 0.93-1.00), PI (RR=0.91, 95%CI 0.97-0.95) and multiracial/ethnic (RR=0.95, 95%CI 0.91-0.99) patients were significantly less likely to be ever surveilled, and that PI (beta=-0.02, 95% CI -0.04-0.01) race/ethnicity was significantly associated with lower PTUDS, while Chinese (beta=0.04, 95% CI 0.02-0.06), Korean (beta=0.04, 95%CI 0.01-0.07), Vietnamese (beta=0.05, 95%CI 0.02-0.09), and other Asian (beta=0.03, 95%CI 0.00-0.07) ethnicities were significantly associated with higher PTUDS. Although not statistically significant, surveillance rates were lower for American Indian/Alaska Native and Black groups, and higher for Japanese and Non-Hispanic Other race/ethnicity groups. Continued analyses will incorporate Sutter data, employ fully adjusted models with clustering by health system, and examine patient, provider, and neighborhood drivers of these disparities. Our findings indicate racial/ethnic disparities in HCC surveillance receipt, particularly noting the heterogeneity within Asian populations, and underscore the importance of analyzing disaggregated data for Asian American groups to fully understand and address these disparities. Citation Format: Enyao Y. Zhang, Mindy DeRouen, Alison J. Canchola, Aly M. Cortella, Pushkar Inamdar, Janet N. Chu, Sixiang Nie, Mai Vu, Ma Somsouk, Michele M. Tana, Anna D. Rubinsky, Iona Cheng, Mi-Ok Kim, Mark Segal, Chanda Ho, Yihe G. Daida, Su-Ying Liang, Hashem B. El-Serag, Scarlett L. Gomez, Salma Shariff-Marco, Caroline A. Thompson. Racial and ethnic differences in receipt of guideline-recommended hepatocellular carcinoma surveillance in a high Risk, diverse primary care patient population: A study in two large integrated healthcare systems in California and Hawai‘i [abstract]. In: Proceedings of the 17th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2024 Sep 21-24; Los Angeles, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2024;33(9 Suppl):Abstract nr A161.

Trends and Disparities in Mental Health Use Among Asian American Sub-groups, 2013-2019.

The objective of this study was to characterize and compare national estimates of mental healthcare use among White and Asian American groups to provide an update using post Affordable Care Act data. We analyzed yearly cross-sectional data from the 2013-2019 Medical Expenditure Panel Survey, including White (n=112,590) and Asian American (n=10,210) individuals, and examined rates of mental healthcare use for Asian (overall), Asian Indian, Chinese, Filipino, and Other Asian individuals relative to White individuals. Using multivariable logistic regression models and predictive margin methods, we estimated overall Asian disparities and Asian subgroup disparities compared to White group rates in mental health care (outpatient, specialty, psychotropic medication) among adults with and without elevated risk for mental illness. Regression models were adjusted for variables related to need for treatment, demographic, and socioeconomic status variables. Asian individuals had lower rates of mental healthcare use than White individuals. Unadjusted results and adjusted regression model predictions are consistent in identifying wide disparities in mental health care treatment across risk for mental illness, Asian subgroups, and types of treatment. Asian Americans have significantly lower rates of mental healthcare use than White Americans, even among those with elevated risk for mental illness. There is small variation by Asian subgroups but disparities persist across subgroups and types of treatment. Our results imply interventions are needed to improve linguistically, culturally, and ethnically tailored outreach and engagement in treatment services, as well as examining treatment and its effectiveness for Asian American individuals living with psychological distress.

Gene discovery and biological insights into anxiety disorders from a large-scale multi-ancestry genome-wide association study.

We leveraged information from more than 1.2 million participants, including 97,383 cases, to investigate the genetics of anxiety disorders across five continental groups. Through ancestry-specific and cross-ancestry genome-wide association studies, we identified 51 anxiety-associated loci, 39 of which were novel. In addition, polygenic risk scores derived from individuals of European descent were associated with anxiety in African, admixed American and East Asian groups. The heritability of anxiety was enriched for genes expressed in the limbic system, cerebral cortex, cerebellum, metencephalon, entorhinal cortex and brain stem. Transcriptome-wide and proteome-wide analyses highlighted 115 genes associated with anxiety through brain-specific and cross-tissue regulation. Anxiety also showed global and local genetic correlations with depression, schizophrenia and bipolar disorder and widespread pleiotropy with several physical health domains. Overall, this study expands our knowledge regarding the genetic risk and pathogenesis of anxiety disorders, highlighting the importance of investigating diverse populations and integrating multi-omics information.

Cross-Disciplinary Rapid Scoping Review of Structural Racial and Caste Discrimination Associated with Population Health Disparities in the 21st Century

A cross-disciplinary rapid scoping review was carried out, generally following the PRISMA-SCR protocol to examine historical racial and caste-based discrimination as structural determinants of health disparities in the 21st century. We selected 48 peer-reviewed full-text articles available from the University of Memphis Libraries database search, focusing on three selected case-study countries: the United States (US), Canada, and Nepal. The authors read each article, extracted highlights, and tabulated the thematic contents on structural health disparities attributed to racism or casteism. The results link historical racism/casteism to health disparities occurring in Black and African American, Native American, and other ethnic groups in the US; in Indigenous peoples and other visible minorities in Canada; and in the Dalits of Nepal, a population racialized by caste, grounded on at least four foundational theories explaining structural determinants of health disparities. The evidence from the literature indicates that genetic variations and biological differences (e.g., disease prevalence) occur within and between races/castes for various reasons (e.g., random gene mutations, geographic isolation, and endogamy). However, historical races/castes as socio-cultural constructs have no inherently exclusive basis of biological differences. Disregarding genetic discrimination based on pseudo-scientific theories, genetic testing is a valuable scientific means to achieve the better health of the populations. Epigenetic changes (e.g., weathering—the early aging of racialized women) due to the DNA methylation of genes among racialized populations are markers of intergenerational trauma due to racial/caste discrimination. Likewise, chronic stresses resulting from intergenerational racial/caste discrimination cause an “allostatic load”, characterized by an imbalance of neuronal and hormonal dysfunction, leading to occurrences of chronic diseases (e.g., hypertension, diabetes, and mental health) at disproportionate rates among racialized populations. Major areas identified for reparative policy changes and interventions for eliminating the health impacts of racism/casteism include areas of issues on health disparity research, organizational structures, programs and processes, racial justice in population health, cultural trauma, equitable healthcare system, and genetic discrimination.

Building Bridges: Catalyzing Institutional Change at Utah State University via Experiential Learning with Ute and Navajo Students

This article presents the development, implementation, and impact of a cultural competence course initiated by the Mentoring and Encouraging Academic Success (MESAS) Program at Utah State University (USU). The MESAS Program supports American Indian, Alaska Native, and Native Hawaiian students through various initiatives, including the Faculty Advocate initiative, talking circles, the Indigenous Knowledge Symposium, and the Native American Living/Learning Community. Under MESAS, the cultural competence course aims to enhance appreciation among faculty, staff, and non-Indigenous students for the contributions of Native American and other underrepresented groups, while addressing institutional barriers to their academic success and social well-being. The course has been adapted for faculty, staff, and graduate students involved in roles such as summer research mentoring and emphasizing the importance of cultural sensitivity in creating a supportive environment for Native American students, particularly those transitioning between campuses. The article also highlights a case study of a USU professor who applied the course's teachings in interactions with students from the Ute Tribe and Navajo Nation, illustrating the practical application of Culturally Responsive Teaching practices and the Funds of Knowledge framework. Overall, the study highlights the course's positive impact on fostering inclusive teaching practices and deepening relationships with Native American students. The findings contribute to the broader discourse on integrating cultural competence in higher education to enhance the experiences of underrepresented student populations.

Variation in Long-Term Postoperative Mortality Risk by Race/Ethnicity After Major Non-cardiac Surgeries in the Veterans Health Administration.

Few large sample studies have examined whether disparities, as measured by the proxy of race/ethnicity, are observed in long-term mortality after high-risk operations performed in a United States national health system. We compared operation year-related mortality risk by race/ethnicity after high-risk operative interventions among patients receiving care within the VHA. From the Veterans Affairs Corporate Data Warehouse and Surgical Quality Improvement Program, data were retrieved for 426,695 patients undergoing high-risk surgical procedures in non-cardiac, general, vascular, thoracic, orthopedic, neurosurgery, and genitourinary specialties between 2000 and 2018. Operation year was used as a surrogate measure of advances in technology and perioperative management. Underrepresented race/ethnicity groups were compared in a binary form with Caucasian/White race, as the reference category. The primary outcome was time to mortality, defined as death occurring at any time, due to any cause, during follow up, and after the initial, eligible surgery. The median follow-up after 537,448 operations among 426,695 patients was 4.8years. After adjustment for preoperative risk factors and demographics, long-term mortality risk decreased significantly to a hazard ratio of 0.96 (95% confidence interval, 0.962 to 0.964) over calendar time. Long-term mortality was not significantly higher among African Americans/Blacks compared to Caucasians/Whites (p = 0.22). Among Hispanics, differences in mortality risk favored Caucasians/Whites in the early years under study-a difference that dissipated as time progressed. In the most recent years, no difference in mortality was observed among Asian/Native Americans and Caucasians/Whites. Risk-adjusted long-term mortality after high-risk operations among Veterans Affairs hospitals did not significantly vary between African Americans/Blacks, Hispanics, and Asian/Native Americans groups.

After Restructuring: Understanding Religion, Nonreligion, and Spirituality in the Twenty-First Century

Abstract The Restructuring of American Religion (1988) provided a still-influential framework for the study of American religion that centered the emergence, after World War II, of a left–right religio-political divide driving mobilization around conflicts understood as moral. But in the last 30 years, the landscape of American religion has been transformed by decline in commitment to mainstream religious institutions, especially white Christian ones, and by the emergence of large groups of Americans who are religiously indifferent or who embrace spirituality or nonreligion. A new framework is needed to account for this transformed landscape. This framework must avoid problems characteristic of earlier approaches by conceiving of morals and interests as mutually constitutive, centering whiteness, racialization, and the defense of heteropatriarchy in explaining religio-political conflict, integrating the study of nonreligion and spirituality and religion, and analyzing not only decline in religious commitment but the changing meaning of religious identity in a transformed landscape.

“Gastrointestinal Quality of Life After Congenital Duodenal Obstruction Repair: A Nationwide Long-term Follow-up Study”

BackgroundCongenital duodenal obstruction (CDO) is one of the most common gastrointestinal congenital anomalies. Still, patient-reported long-term results are limited. The aims of this study were to evaluate the long-term gastrointestinal quality of life (QoL), generic QoL, patient-reported scar appearance, and reinterventions after CDO repair. MethodsPatients who underwent surgery for CDO in Norway from 1995 to 2020 were invited to answer the validated questionnaires PedsQL and PedsQL gastrointestinal symptom scale and a study-specific questionnaire on general health and scar assessment. Parent-proxy reports were used for patients <12 years and patients with cognitive impairment. Scores were compared with an American and Norwegian control group for gastrointestinal and generic QoL, respectively. ResultsOf 186 eligible patients, eight were deceased, 25 had unretrievable contact information, and 79 did not respond. There were no significant differences between included (n = 74) and not included (n = 112) patients regarding baseline data. The mean follow-up time was 13.3 (SD = 6.6) years. Patients with CDO had significantly lower overall gastrointestinal QoL than controls (85.9 versus 90.0, p = 0.010). The most common symptoms were gas/bloating, constipation, food/drink limits, and reflux. Generic QoL was similar between the CDO population and controls (84.4 versus 85.3, p = 0.530). Twenty-one (28 %) patients had some degree of pain and/or concern related to the surgical scar. Nine (12 %) patients had reoperations related to the CDO repair; four due to adhesive small bowel obstruction. ConclusionA notable portion of patients report troublesome gastrointestinal symptoms and cosmetic concerns regarding their surgical scar after CDO repair. Even so, generic QoL was good. Level of evidenceIV.

Patterns of pharmacogenetic variation in nine biogeographic groups.

Frequencies of pharmacogenetic (PGx) variants are known to differ substantially across populations but much of the available PGx literature focuses on one or a few population groups, often defined in nonstandardized ways, or on a specific gene or variant. Guidelines produced by the Clinical Pharmacogenetic Implementation Consortium (CPIC) provide consistent methods of literature extraction, curation, and reporting, including comprehensive curation of allele frequency data across nine defined "biogeographic groups" from the PGx literature. We extracted data from 23 CPIC guidelines encompassing 19 genes to compare the sizes of the populations from each group and allele frequencies of altered function alleles across groups. The European group was the largest in the curated literature for 16 of the 19 genes, while the American and Oceanian groups were the smallest. Nearly 200 alleles were detected in nonreference groups that were not reported in the largest (reference) group. The genes CYP2B6 and CYP2C9 were more likely to have higher frequencies of altered function alleles in nonreference groups compared to the reference group, while the genes CYP4F2, DPYD, SLCO1B1, and UGT1A1 were less likely to have higher frequencies in nonreference groups. PGx allele frequencies and function differ substantially across nine biogeographic groups, all but two of which are underrepresented in available PGx data. Awareness of these differences and increased efforts to characterize the breadth of global PGx variation are needed to ensure that implementation of PGx-guided drug selection does not further widen existing health disparities among populations currently underrepresented in PGx data.

Reticulate evolution and rapid development of reproductive barriers upon secondary contact in a forest fungus

Reproductive barriers between sister species of the mushroom-forming fungi tend to be stronger in sympatry, leading to speculation on whether they are being reinforced by selection against hybrids. We have used population genomic analyses together with invitro crosses of a global sample of the wood decay fungus Trichaptum abietinum to investigate reproductive barriers within this species complex and the processes that have shaped them. Our phylogeographic analyses show that T.abietinum is delimited into six major genetic groups: one in Asia, two in Europe, and three in North America. The groups present in Europe are interfertile and admixed, whereas our crosses show that the North American groups are reproductively isolated. In Asia, a more complex pattern appears, with partial intersterility between subgroups that likely originated independently and more recently than the reproductive barriers in North America. We found pre-mating barriers in T.abietinum to be moderately correlated with genomic divergence, whereas mean growth reduction of the mated hybrids showed a strong correlation with increasing genomic divergence. Genome-wide association analyses identified candidate genes with programmed cell death annotations, which are known to be involved in intersterility in distantly related fungi, although their link here remains unproven. Our demographic modeling and phylogenetic network analyses fit a scenario where reproductive barriers in Trichaptum abietinum could have been reinforced upon secondary contact between groups that diverged in allopatry during the Pleistocene glacial cycles. Our combination of experimental and genomic approaches demonstrates how T.abietinum is a tractable system for studying speciation mechanisms.

Dinomyid (Rodentia, Caviomorpha) diversity from the Late Miocene (Chasicoan Stage/Age) Cerro Azul Formation at the classical Arroyo Chasicó locality (Argentina)

ABSTRACT Dinomyidae is a South American group of caviomorph rodents with a single extant species (Dinomys branickii), but with a rich fossil record including medium-sized to giant species, which reached its peak diversity during the Late Miocene. The dinomyids from the Cerro Azul Formation (late Middle Miocene to Early Pliocene) have been studied in detail from localities in La Pampa Province, Argentina. In this contribution, dinomyids from Chasicoan Stage/Age (Late Miocene) levels of the Cerro Azul Formation at Arroyo Chasicó locality (Buenos Aires Province, Argentina) are revised, including previously published material and unpublished ones. We confirm the presence of Tetrastylus sp. Diaphoromys gamayensis, and define two new taxa, Bondesiomys chasiquensis gen. et sp. nov. and Gyriabrus sokka sp. nov. The diversity of dinomyids from the Cerro Azul Formation at Arroyo Chasicó is higher than other Chasicoan faunas at the same latitude, identified in localities of La Pampa Province, since in Cerro Patagua there are not Dinomyidae records and in Cerro la Bota Tetrastylus sp. and Dinomyidae indet. were the only recorded taxa.

Positive Trends in Racial Disparities for Head and Neck Microvascular Reconstructive Surgery.

To evaluate national trends in racial disparities for patients undergoing head and neck reconstructive surgery. Retrospective analysis using the 2008 to 2021 American College of Surgeons National Surgical Quality Improvement Program database. Patients receiving microvascular free tissue transfer were eligible for inclusion. Pediatric patients and those treated by non-otolaryngologists were excluded. Outcomes were analyzed with univariate and multivariable models. A total of 5831 head and neck free flap cases were analyzed, 4869 (83.5%) were White, 560 (9.6%) were Black or African American, and 402 (6.9%) were Asian, Native American, or other groups (ANAOG). The proportion of Black or African American patients and ANAOG patients undergoing free tissue transfer increased significantly over the time period (p = 0.047 and p = 0.010, respectively). However, there was a downtrend that started around 2017. In a multivariable model, Black or African American race was not associated with readmission (OR = 0.99 [95% CI 0.74, 1.31], p > 0.05), returning to the operating room (OR = 1.20 [95% CI 0.96, 1.49], p > 0.05), or any post-operative complication (OR = 0.83 [95% CI 0.68, 1.01], p > 0.05). There were also no significant associations found in the ANAOG population on multivariate analysis (p > 0.05 for all). The percentage of free tissue transfer performed in patients from minority backgrounds with head and neck cancer has been increasing in the United States. Outcomes after head and neck microvascular reconstruction are similar when stratified by race. However, racial disparities remain and further work is necessary to reduce these disparities. Level IV Laryngoscope, 2024.