Clinical Implications of Low Body Mass Index on Endovascular Lower Extremity Revascularization.

OBJECTIVE: The epidemic of obesity and associated cardiovascular morbidity continues to grow, attracting public attention and healthcare resources. However, the impact of malnutrition and being underweight continues to be overshadowed by obesity, especially in patients with peripheral arterial disease (PAD). This study assesses the characteristics and outcomes of patients with low body mass index (BMI ≤ 18.5) compared to patients with nonobese BMI undergoing peripheral vascular interventions (PVI). METHODS: A retrospective analysis of patients undergoing PVI due to PAD registered in the VQI database. Patients were categorized into underweight (BMI ≤ 18.5) and nonobese BMI (BMI=18.5-30). Patients in both groups were matched 3:1 for baseline demographic characteristics, comorbidities, medications, and indications. Kaplan-Meier analysis was done for long-term outcomes. RESULTS: A total of 337,926 patients underwent PVI, of whom 12,935 (4%) were underweight, 215,728 (64%) were nonobese, and 109,263 (32%) were obese. Underweight patients were more likely to be older, female, smokers, with COPD, and more likely to present with chronic limb-threatening ischemia than nonobese patients. After propensity matching, there were 18,047 nonobese patients and 6,031 underweight patients. There were no significant differences in matched characteristics. Perioperatively, underweight patients were more likely to require a longer hospital length of stay. Underweight patients had statistically significantly higher 30-day mortality compared to patients with nonobese BMI (3% vs. 1.6%, p<0.001) and a higher rate of thrombotic complications. As for long-term outcomes, underweight patients had a higher rate of reintervention (20% vs. 18%, p<0.001) and major adverse limb events (27% vs. 22%, p<0.001). The 4-year rate of amputation-free survival was significantly lower in underweight patients (70% vs. 82% p<0.001), and the 2-year freedom from major amputation (90% vs. 94% p<0.001) showed similar trends with worse outcomes in patients who were underweight. CONCLUSIONS: Underweight patients with PAD are disproportionally more likely to be African American, females, and smokers and suffer worse outcomes after PVI than PAD patients with nonobese BMI. When possible, increased scrutiny and optimization of nutrition and other factors contributing to low BMI should be addressed prior to PVI.

Intranasal neomycin evokes broad-spectrum antiviral immunity in the upper respiratory tract.

Respiratory virus infections in humans cause a broad-spectrum of diseases that result in substantial morbidity and mortality annually worldwide. To reduce the global burden of respiratory viral diseases, preventative and therapeutic interventions that are accessible and effective are urgently needed, especially in countries that are disproportionately affected. Repurposing generic medicine has the potential to bring new treatments for infectious diseases to patients efficiently and equitably. In this study, we found that intranasal delivery of neomycin, a generic aminoglycoside antibiotic, induces the expression of interferon-stimulated genes (ISGs) in the nasal mucosa that is independent of the commensal microbiota. Prophylactic or therapeutic administration of neomycin provided significant protection against upper respiratory infection and lethal disease in a mouse model of COVID-19. Furthermore, neomycin treatment protected Mx1 congenic mice from upper and lower respiratory infections with a highly virulent strain of influenza A virus. In Syrian hamsters, neomycin treatment potently mitigated contact transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In healthy humans, intranasal application of neomycin-containing Neosporin ointment was well tolerated and effective at inducing ISG expression in the nose in a subset of participants. These findings suggest that neomycin has the potential to be harnessed as a host-directed antiviral strategy for the prevention and treatment of respiratory viral infections.

Comparative Outcomes of Peripheral Vascular Interventions in Patients on Chronic Anticoagulation with Factor Xa Inhibitors and Vitamin K Antagonists.

BACKGROUND: In patients undergoing revascularization for peripheral arterial disease (PAD), low-dose Factor Xa inhibitors (FXaI) taken with aspirin improved limb and cardiovascular outcomes compared to aspirin alone. Furthermore, in atrial fibrillation and venous thromboembolism, FXaI are recommended over vitamin K antagonists (VKA) for chronic anticoagulation. While studies have evaluated different perioperative anticoagulation regimens in patients treated for PAD, the optimal regimen for chronic anticoagulation in patients with PAD undergoing peripheral vascular intervention (PVI) has not been determined. This analysis compares outcomes of patients after PVI that require chronic anticoagulation with FXaI and VKA. METHODS: The Vascular Quality Initiative-PVI database was used. Patients consistently treated with FXaI or VKA before the procedure, at discharge, and on long-term follow-up were defined as those receiving chronic anticoagulation. Patient demographics, procedural details, and perioperative and long-term outcomes were compared between FXaI and VKA groups. RESULTS: A total of 109,268 patients were analyzed, and 6,885 were chronically anticoagulated with FXaI (N = 2,427) or VKA (N = 4,458). Patients anticoagulated with VKA were more frequently males (65.3% vs. 61.0%, P < 0.001) with end-stage renal disease (9.7% vs. 4.6%, P < 0.001) and more likely to be treated for chronic limb-threatening ischemia (58.1% vs. 52.7%, P < 0.001). Rates of hematoma following PVI were significantly higher in patients taking VKA compared to FXaI (3.5% vs. 1.9%, P < 0.001). Multivariable logistic regression analysis showed that VKA were associated with increased perioperative hematoma than FXaI (odds ratio = 1.89 [1.30-2.82]). Compared to patients taking VKA, those receiving FXaI had lower rates of major amputation (6.7% vs. 8.4%, P = 0.020) and mortality (7.6% vs. 15.2%, P ≤ 0.001). Using Kaplan-Meier analysis, patients consistently anticoagulated with FXaI had improved amputation-free survival after PVI. Adjusting for significant patient and procedural characteristics, Cox proportional hazard regression demonstrated that there is an increased risk for major amputation or mortality in patients using VKA compared to FXaI (hazard ratio 1.61, [1.36-1.90]). CONCLUSIONS: Chronic anticoagulation with FXaI as compared to VKA was associated with superior perioperative and long-term outcomes in patients with PAD undergoing PVI. FXaI should be the preferred agents over VKA for chronic anticoagulation in patients with PAD undergoing PVI.

Insulin Requirement and Infrainguinal Bypass Outcomes in Patients with Peripheral Arterial Disease.

BACKGROUND: Diabetes mellitus (DM) is a major risk factor for peripheral artery disease. The association of DM with major adverse limb events (MALE) after lower extremity revascularization remains controversial, as patients with diabetes are typically analyzed as a single, homogenous group. Using a large national database, this study examines the impact of insulin use and glycemic control on the outcomes following infrainguinal bypass. The hypothesis is that prevalent insulin therapy and elevated hemoglobin A1c (HbA1c) are associated with an increased risk of MALEs after infrainguinal bypass in patients with DM and could therefore be used for risk stratification. METHODS: The Vascular Quality Initiative database files for infrainguinal bypass (2007-2021) were retrospectively reviewed. Patients with DM undergoing bypass for peripheral artery disease were included. Patients on dialysis or with prior kidney transplantation were excluded. The characteristics and outcomes of patients with insulin-requiring diabetes mellitus (IRDM) were compared to those of patients not requiring insulin (noninsulin-requiring diabetes mellitus [NIRDM]) prior to the bypass procedure. RESULTS: A total of 9,686 patients with DM (56% IRDM) underwent bypass. Patients with IRDM were significantly younger than patients with NIRDM, more likely to be female (P < 0.01), African American (P < 0.01), and Hispanic (P = 0.031), and more likely to have comorbidities and be categorized into American Society of Anesthesiologist classes IV-V. They were more likely to be treated for chronic limb-threatening ischemia (P < 0.001). Patients with IRDM had significantly higher perioperative complications with no difference in perioperative mortality between the 2 groups. Beyond the perioperative period, with a mean follow-up of 427 days, patients with IRDM had significantly lower crude rates of primary patency and higher crude rates of major amputation, MALE, and mortality compared to patients with NIRDM. Regression analyses demonstrated that insulin requirement, but not HbA1c, was independently associated with a higher risk of MALE (hazard ratio = 1.17 [1.06-1.29]) and mortality (hazard ratio = 1.28 [1.16-1.43]). CONCLUSIONS: Insulin requirement, but not HbA1c, is significantly associated with MALEs and survival after infrainguinal bypass in the Vascular Quality Initiative. Stratification of patients with DM based on their prevalent insulin use prior to infrainguinal bypass surgery could improve the prediction of outcomes of peripheral arterial bypass surgery in patients with diabetes.

The Use and Impact of Cilostazol on Patients Undergoing Endovascular Peripheral Interventions.

BACKGROUND: Cilostazol is used for the treatment of intermittent claudication. The impact of cilostazol on the outcomes of peripheral vascular interventions (PVIs) remains controversial. This study assesses the use and impact of cilostazol on patients undergoing PVI for peripheral arterial disease (PAD). METHODS: The Vascular Quality Initiative (VQI) database files for PVI were reviewed. Patients with PAD who underwent PVI for chronic limb threatening-ischemia or claudication were included and divided based on the use of cilostazol preoperatively. After propensity matching for patient demographics and comorbidities, the short-term and long-term outcomes of the 2 groups (preoperative cilostazol use versus no preoperative cilostazol use) were compared. The Kaplan-Meier method was used to determine outcomes. RESULTS: A total of 245,309 patients underwent PVI procedures and 6.6% (N = 16,366) were on cilostazol prior to intervention. Patients that received cilostazol were more likely to be male (62% vs 60%; P < 0.001), White (77% vs. 75%; P < 0.001), and smokers (83% vs. 77%; P < 0.001). They were less likely to have diabetes mellitus (50% vs. 56%; P < 0.001) and congestive heart failure (14% vs. 23%; P < 0.001). Patient on cilostazol were more likely to be treated for claudication (63% vs. 40%, P < 0.001), undergo prior lower extremity revascularization (55% vs. 51%, P < 0.001) and less likely to have undergone prior minor and major amputation (10% vs. 19%; P < 0.001) compared with patients who did not receive cilostazol. After 3:1 propensity matching, there were 50,265 patients included in the analysis with no differences in baseline characteristics. Patients on cilostazol were less likely to develop renal complications and more likely to be discharged home. Patients on cilostazol had significantly lower rates of long-term mortality (11.5% vs. 13.4%, P < 0.001 and major amputation (4.0% vs. 4.7%, P = 0.022). However, there were no significant differences in rates of reintervention, major adverse limb events, or patency after PVI. Amputation-free survival rates were significantly higher for patients on cilostazol, after 4 years of follow up (89% vs. 87%, P = 0.03). CONCLUSIONS: Cilostazol is underutilized in the VQI database and seems to be associated with improved amputation-free survival. Cilostazol therapy should be considered in all patients with PAD who can tolerate it prior to PVI.

Arterial dissection during peripheral vascular interventions.

OBJECTIVE: Arterial dissection (AD) is a known complication of peripheral vascular interventions (PVIs), but its incidence and significance have not been well-characterized. This study examines AD in the Vascular Quality Initiative database for patients treated for peripheral arterial disease. Our hypothesis is that AD is associated with decreased patency and worse limb outcomes. METHODS: The Vascular Quality Initiative PVI registry (2016-2021) was reviewed. Patients were divided based on the presence or absence of reported AD during the procedure. Trend of incidence and management of AD was derived. The characteristics and outcomes of patients with and without AD were compared. The primary endpoint was primary patency. RESULTS: There was a total of 177,790 cases, and 3% had AD. The incidence of AD significantly increased over the study period from 2.4% to 3.6% (P = .007). Endovascular therapy was used to treat AD in 83.7% of cases, 14.5% were treated medically, and only 1.8% required open surgery. Patients with AD were significantly more likely to be female (47.4% vs 39.7%; P < .001). Patient with AD were more likely to have a history of smoking (79.7% vs 77.2%; P < .001), but were significantly less likely to be on dialysis (8.2% vs 9.3%; P < .001) compared with patients without AD. Patients with AD were more likely to have femoropopliteal disease (45.2% vs 38.0%; P < .001) and undergo treatment of more complex disease as denoted by higher mean number of lesions treated (1.95 ± 1.01 vs 1.71 ± 0.89; P < .001), longer occlusion length (8 ± 16 vs 7 ± 15 cm; P < .001), and more severe TransAtlantic Inter-Society Consensus grade (Grade D: 36.2% vs 29.1%; P < .001). The proportion of stenting as a treatment modality was higher in the dissection group (55.4% vs 41.1%; P < .001). After a mean follow-up of 828 days, patients with AD had significantly lower primary patency than patients without AD. Kaplan-Meier curves demonstrated that the AD group had lower primary patency (86.9% vs 91%; P < .001) and reintervention-free survival (79.5 % vs 84.1%; P < .001) at 1 year with difference in amputation-free survival. Cox proportional hazard regression confirmed the independent association of AD with primary patency and reintervention-free survival. CONCLUSIONS: AD is more common in women and is more likely to occur during treatment of the femoropopliteal segment. AD is associated with decreased primary patency and reintervention-free survival after PVI for peripheral arterial disease.

Development of an innovative curriculum for paediatricians on peanut allergy prevention: How do we address current guidelines?

BACKGROUND: There exists strong evidence for the early introduction of peanut to at-risk infants for the primary prevention of peanut allergy. There is a need for educational initiatives to assist in dissemination and implementation of updated clinical guidelines on peanut allergy prevention. APPROACH: The aim for this project was to create an innovative curriculum for paediatricians on peanut allergy prevention. The Intervention to Reduce Early Allergy (Peanut) in Childhood (iREACH) study was leveraged to recruit paediatricians for a needs assessment. Materials from the iREACH study, including an educational YouTube video and knowledge survey, were evaluated. Applying findings from the needs assessment, an innovative curriculum was developed, and updated knowledge survey questions were developed. EVALUATION: The iREACH YouTube video had suboptimal viewing behaviours, and iREACH participants had high baseline knowledge scores that did improve after viewing the video. The majority of respondents to the needs assessment felt that all paediatricians needed access to an effective educational module on peanut allergy prevention, and they wanted a broadly accessible curriculum that incorporated quality media and content segmentation. An online, interactive curriculum was developed that includes clinical cases and games, and updated knowledge questions were created with associated internal structure and reliability evidence, as well as relation to other variables evidence. IMPLICATION: The next steps of this project will focus on curriculum implementation and evaluation through a randomised, prospective study with the aim to serve as an educational model for how to integrate specialty-specific guidelines into broader clinical practice through education.

Feedback Culture Perceived by Trainees in an Academic Institution: A Mixed Methods Study.

OBJECTIVES: Lack of a well-functioning institutional feedback culture can undermine acquisition of skills essential for high quality patient care. The objective of this study was to assess feedback culture perceived by resident and fellow trainees, utilizing a mixed methods design. METHODS: Pediatric fellows and residents completed an anonymous feedback environment survey consisting of 7 constructs: source credibility, feedback quality, feedback delivery, reinforcing feedback, constructive feedback, source availability, and promotion of feedback seeking, using a 7-point Likert scale. Trainee ratings were compared using two-sided Fisher's exact tests. Multivariable analyses used a linear regression model. For the qualitative study, semistructured interviews of residents were conducted. The constant comparative method was used to incrementally code, categorize data, and derive themes. RESULTS: Fifty-two residents and 21 fellows completed the survey (response rates 65% and 47%, respectively). Scores were more favorable for fellows compared with residents in 6 of 7 feedback constructs (P < .05), including on multivariate analysis. Hispanic ethnicity and female gender were associated with lower scores on source credibility (P = .04) and constructive feedback (P = .03), respectively. Two qualitative themes were identified: expectation of efficiency in patient care compromises the quality and quantity of feedback, and a culture that prioritizes courtesy over candor negatively impacts feedback quality. These themes were more pronounced when residents worked with pediatric subspecialists compared with hospitalists. CONCLUSIONS: We described the feedback culture, which was less favorable in the residency program. The need for efficient patient care and a culture of courtesy adversely impacted the quality of feedback, especially among subspecialists.

Results of a Multi-Disciplinary and Multi-Institutional Pilot Creating High-Yield Physics Educational Content (Hi-Phy).

Purpose: The quality of medical physics education is heterogenous across training programs, despite its importance in radiation oncology (RO) residency training. We present the results of a pilot series of free high-yield physics educational videos covering 4 topics chosen from the American Society for Radiation Oncology core curriculum. Methods and materials: Scripting and storyboarding of videos were iterative processes performed by 2 ROs and 6 medical physicists, with animations created by a university broadcasting specialist. Current RO residents and those who had graduated after 2018 were recruited through social media and e-mail with an aim of 60 participants. Two validated surveys were adapted for use and were completed after each video as well as a final overall assessment. Content was released sequentially after completion of the survey instruments for each prior video. All videos were created and released within 1 year of project initiation with a duration of 9 to 11 minutes. Results: There were 169 enrollees for the pilot from across the world, 211% of the targeted cohort size. Of these, 154 met eligibility criteria and received the first video. One hundred eight enrollees initiated the series and 85 completed the pilot, resulting in a 78% completion rate. Participants reported improved understanding and confidence applying the knowledge learned in the videos (median score 4 out of 5). All participants reported that the use of graphic animation improved understanding across all videos. Ninety-three percent agreed with a need for additional resources geared specifically toward RO residents and 100% would recommend these videos to other residents. Use metrics revealed the average watch time was 7 minutes (range, 6:17-7:15). Conclusions: The high-yield educational physics video pilot series was successful in developing videos that were effective in teaching RO physics concepts.

A Tool to Assess Competence in Critical Care Ultrasound Based on Entrustable Professional Activities.

Background: Existing assessment tools for competence in critical care ultrasound (CCUS) have limited scope and interrupt clinical workflow. The framework of entrustable professional activities (EPAs) is well suited to developing an assessment tool that is comprehensive and readily integrated into the intensive care unit (ICU) training environment. Objective: This study sought to design an EPA-based tool to assess competence in CCUS for pulmonary and critical care fellows and to assess the validity and reliability of the tool. Methods: Eight experts in CCUS met to define the core EPAs for CCUS. A nominal group technique was used to reach consensus. An assessment tool was created based on the EPAs with a modified Ottawa entrustability scale. Trained faculty evaluated pulmonary and critical care fellows using this tool in the ICU over a 6-month study period at a single institution. An assessment of validity of the EPA-based tool is made with four sources of validity evidence: content, response process, reliability, and relation to other variables. Reliability and response process data were generated using generalizability theory analysis to estimate sources of variance in entrustment scores. Analysis of response process validity and validity by relation to other variables was performed using regression models. Results: Fifty-four assessments were recorded during the study period, conducted on 23 trainees by 13 faculty. Content validity of the tool was demonstrated using expert consensus and published guidelines from critical care societies to define the EPAs. Response process validity was demonstrated by the low variance in entrustment scores due to evaluators (0.086 or 6%) and high agreement between score and trainee self-assessment (regression coefficient, 0.82; P < 0.0001). Reliability was demonstrated by the high "true" variance in entrustment score attributable to the trainee: 0.674 or 45%. Validity by relation to other variables was demonstrated using regression analysis to show correlation between entrustment score and the number of times a fellow has performed an EPA (regression coefficient, 0.023; P < 0.0001). Conclusion: An EPA-based assessment tool for competence in CCUS was created. We obtained sufficient validity evidence on three of the diagnostic EPAs. Procedural EPAs were infrequently assessed, limiting generalizability in this subgroup.

The management of patients with popliteal artery aneurysms presenting with acute limb ischemia.

OBJECTIVE: Endovascular popliteal artery aneurysm (PAA) repair has acceptable outcomes compared with open repair for elective therapy. Endovascular repair for urgent PAA causing acute limb ischemia (ALI) has not been well-studied. This project compares outcomes of urgent endovascular and open repair of PAA with ALI. METHODS: The Vascular Quality Initiative database for peripheral vascular interventions (PVIs) and infrainguinal bypass were reviewed for PAAs with ALI from 2010 to 2021. Only patients entered as having symptoms of ALI in the PVI module and ALI as indication in the infrainguinal bypass module were included. In addition, patients undergoing elective treatment were excluded and the sample analyzed was restricted to patients undergoing urgent and emergent open and endovascular repair. Patient demographics and comorbidities as well as procedural details were compared between the two groups. Perioperative complications up to 30 days were compared as well as long-term outcomes including major amputation and mortality at 1 year. RESULTS: Urgent PAA repair for ALI constituted 10.5% (n = 571) of all PAAs. Most urgent repairs were open (80.6%; n = 460) with 19.4% (n = 111) endovascular. The proportion of endovascular repair significantly increased from 16.7% in 2010 to 85.7% in 2021. Patients undergoing endovascular repair were older (71.2 ± 12.5 vs 68.0 ± 11.8; P = .011) than patients undergoing open repair. They were also more likely to have coronary artery disease (32.4% vs 21.7%; P = .006). Open PAA repair was associated with more bleeding complications (20.8% vs 2.7%; P < .001), longer postoperative length of stay (8.1 ± 9.3 days vs 4.9 ± 5.6 days; P < .001), and less likelihood of discharge to home (64.9% vs 70.3%; P = .051). Perioperative major amputation rate was 7.5% with no difference between the two treatment strategies up to 1 year. However, patients receiving endovascular repair had higher inpatient (1.1% vs 0%; P < .001), 30-day (6.3% vs 0.4%; P < .001), and 1-year (16.5% vs 8.4%; P = .02) mortality. Multivariable regression analysis suggested that endovascular repair was possibly associated with increased 30-day mortality, but not 1-year mortality. CONCLUSIONS: Endovascular PAA has exponentially increased from 2010 to 2021. Endovascular repair is associated with decreased complications and hospital length of stay. The increased perioperative mortality seen in this group is likely due to selection bias.

Role of Positive Age Beliefs in Recovery From Mild Cognitive Impairment Among Older Persons.

This cohort study examines the contribution of positive age beliefs to recovery from mild cognitive impairment among older persons.

COVID-19 Infections and Predictors of Sickness Related Absences Among Healthcare Workers: The Experience of a Tertiary Care Center With the COVID-19 Pandemic.

BACKGROUND: Little has been published on predictors of prolonged sick leaves during the COVID-19 pandemic. This study aims to determine the rate of COVID-19 infections among healthcare workers (HCWs) and to identify the predictors of longer sick leave days. METHODS: We identified predictors of longer sick leave using linear regression analysis in a cross-sectional study design. RESULTS: Thirty-three percent of the total workforce contracted COVID-19. On average, HCWs took 12.5 sick leave days after COVID-19 infection. The regression analysis revealed that older employees, nurses, and those who caught COVID-19 earlier in the pandemic were more likely to take longer sick leave. CONCLUSIONS: Age, job position, and month of infection predicted sick leave duration among HCWs in our sample. Results imply that transmission was most likely community-based. Public health interventions should consider these factors when planning for future pandemics.

Societal impact on older persons' chronic pain: Roles of age stereotypes, age attribution, and age discrimination.

RATIONALE: In view of the severity and prevalence of chronic pain, combined with the limited success of long-term treatments, there is the need for a more expansive understanding of its etiology. We therefore investigated over time three societal-based potential determinants of chronic pain that were previously unexamined in this connection: negative age stereotypes, age attribution, and age discrimination. METHODS: The cohort consisted of 1373 Americans aged 55 and older, who participated in four waves of the National Health and Resilience in Veterans Study, spanning seven years. RESULTS: Consistent with the hypotheses, negative age stereotypes as well as age discrimination predicted chronic pain, and age attribution acted as a mediator between the negative age stereotypes and chronic pain. In a subset of participants who were free of chronic pain at baseline, those who had assimilated negative age stereotypes were 32% more likely to develop chronic pain in the next seven years than those who had assimilated positive age stereotypes. CONCLUSION: Our finding that the three societal-based and modifiable predictors contributed to chronic pain refutes the widely held belief that chronic pain experienced in later life is entirely and inevitably a consequence of aging.

Determinants of indoor carbonaceous aerosols in homes in the Northeast United States.

BACKGROUND: Little is known about sources of residential exposure to carbonaceous aerosols, which include black carbon (BC), the elemental carbon core of combustion particles, and organic compounds from biomass combustion (delta carbon). OBJECTIVE: Assess the impact of residential characteristics on indoor BC and delta carbon when known sources of combustion (e.g., smoking) are minimized. METHODS: Between November 2012-December 2014, 125 subjects (129 homes) in Northeast USA were recruited and completed a residential characteristics questionnaire. Every 3 months, participants received an automated sampler to measure fine particulate matter (PM2.5) in their home during a weeklong period (N = 371 indoor air samples) and were also questioned about indoor exposures. The samples were analyzed using a transmissometer at 880 nm (reflecting BC) and at 370 nm. The difference between the two wavelengths estimates delta carbon. Outdoor BC and delta carbon were measured using a central site aethalometer. RESULTS: Geometric mean indoor concentrations of BC and delta carbon (0.65 µg/m³ and 0.19 µg/m³, respectively), were greater than central site concentrations (0.53 µg/m³ and 0.02 µg/m³, respectively). Multivariable analysis showed that greater indoor concentrations of BC were associated with infrequent candle use, multi-family homes, winter season, lack of air conditioning, and central site BC. For delta carbon, greater indoor concentrations were associated with apartments, spring season, and central site concentrations. SIGNIFICANCE: In addition to outdoor central site concentrations, factors related to the type of housing, season, and home exposures are associated with indoor exposure to carbonaceous aerosols. Recognition of these characteristics should enable greater understanding of indoor exposures and their sources.

Anxiety Among Healthcare Workers During COVID-19 Pandemic in Lebanon: The Importance of the Work Environment and Personal Resilience.

Background: Healthcare workers (HCWs) have been severely impacted by the COVID-19 pandemic. In addition to their risk of direct exposure to the virus, they were subjected to long working hours, scarcity of PPE, and additional stressors that impacted their psychological wellbeing. The purpose of this study was to assess anxiety and its predictors among a sample of HCWs at the American University of Beirut Medical Center (AUBMC) and to evaluate the association between resilience and anxiety. Methods: This cross-sectional study was conducted using an online survey between March and June 2021 among HCWs at AUBMC. The psychosocial scale section included the 7-item generalized anxiety disorder (GAD-7) scale and a 25-item resilience scale, validated tools used to assess anxiety and resilience respectively. Data were analyzed on SPSS version 27, and descriptive statistics were applied. Predictors were evaluated using bivariate and multivariate linear regression. Results: From a total of 92 participants, 75% were involved in direct patient care, and of those, 95% worked directly with suspected or confirmed COVID-19 patients. The majority (83%) had minimal to mild anxiety, whereas the rest had moderate to high anxiety levels. Around 41% reported moderately high to high resilience, 47% were found to be between the low end and moderate resilience scale and only 12% had very low or low resilience. More than 80% of the participants received PPE training, reported always working with adequate preventive infection control measures, and were vaccinated. Further, more than 70% of participants reported trusting the management and agreed that the safety of the workers is considered a high priority. No significant association between sociodemographic and COVID-19 work exposure factors with anxiety was found. Multivariate analysis results showed that a lower anxiety score was associated with higher resilience (p = 0.011). Conclusion: This study has shown a strong association between low anxiety levels and high resilience scores in this group of mostly vaccinated HCWs caring for COVID-19 patients. The high percentage of vaccination along with PPE availability could explain the low anxiety levels reported among the participants.

Development and utilization of a surrogate SARS-CoV-2 viral neutralization assay to assess mRNA vaccine responses.

BACKGROUND: Tests for SARS-CoV-2 immunity are needed to help assess responses to vaccination, which can be heterogeneous and may wane over time. The plaque reduction neutralization test (PRNT) is considered the gold standard for measuring serum neutralizing antibodies but requires high level biosafety, live viral cultures and days to complete. We hypothesized that competitive enzyme linked immunoassays (ELISAs) based on SARS-CoV-2 spike protein's receptor binding domain (RBD) attachment to its host receptor, the angiotensin converting enzyme 2 receptor (ACE2r), would correlate with PRNT, given the central role of RBD-ACE2r interactions in infection and published studies to date, and enable evaluation of vaccine responses. METHODS AND RESULTS: Configuration and development of a competitive ELISA with plate-bound RBD and soluble biotinylated ACE2r was accomplished using pairs of pre/post vaccine serum. When the competitive ELISA was used to evaluate N = 32 samples from COVID-19 patients previously tested by PRNT, excellent correlation in IC50 results were observed (rs = .83, p < 0.0001). When the competitive ELISA was used to evaluate N = 42 vaccinated individuals and an additional N = 13 unvaccinated recovered COVID-19 patients, significant differences in RBD-ACE2r inhibitory activity were associated with prior history of COVID-19 and type of vaccine received. In longitudinal analyses pre and up to 200 days post vaccine, surrogate neutralizing activity increased markedly after primary and booster vaccine doses, but fell substantially, up to <12% maximal levels within 6 months. CONCLUSIONS: A competitive ELISA based on inhibition of RBD-ACE2r attachment correlates well with PRNT, quantifies significantly higher activity among vaccine recipients with prior COVID (vs. those without), and highlights marked declines in surrogate neutralizing activity over a 6 month period post vaccination. The findings raise concern about the duration of vaccine responses and potential need for booster shots.

WBAs in UME-How Many Are Needed? A Reliability Analysis of 5 AAMC Core EPAs Implemented in the Internal Medicine Clerkship.

BACKGROUND: Reliable assessments of clinical skills are important for undergraduate medical education, trustworthy handoffs to graduate medical programs, and safe, effective patient care. Entrustable professional activities (EPAs) for entering residency have been developed; research is needed to assess reliability of such assessments in authentic clinical workspaces. DESIGN: A student-driven mobile assessment platform was developed and used for clinical supervisors to record ad hoc entrustment decisions using the modified Ottawa scale on 5 core EPAs in an 8-week internal medicine (IM) clerkship. After a 12-month period, generalizability (G) theory analysis was performed to estimate the reliability of entrustment scores and determine the proportion of variance attributable to the student and the other facets, including particular EPA, evaluator type (attending versus resident), or case complexity. Decision (D) theory analysis determined the expected reliability based on the number of hypothetical observations. A g-coefficient of 0.7 was used as a generally agreed upon minimum reliability threshold. KEY RESULTS: A total of 1368 ratings over the 5 EPAs were completed on 94 students. Variance attributed to person (true variance) was high for all EPAs; EPA-5 had the lowest person variance (9.8% across cases and four blocks). Across cases, reliability ranged from 0.02 to 0.60. Applying this to the Decision study, the estimated number of observations needed to reach a reliability index of 0.7 ranged between 9 and 11 for all EPAs except EPA5 which was sensitive to case complexity. CONCLUSIONS: Work place-based clinical skills in IM clerkship students were assessed and logged using a convenient mobile platform. Our analysis suggests that 9-11 observations are needed for these EPA workplace-based assessments (WBAs) to achieve a reliability index of 0.7. Note writing was very sensitive to case complexity. Further reliability analyses of core EPAs are needed before US medical schools consider wider adoption into summative entrustment processes and GME handoffs.

Impact of Media-Based Negative and Positive Age Stereotypes on Older Individuals' Mental Health.

OBJECTIVES: During the COVID-19 pandemic, stigmatization of older persons increased in traditional and social media. It was unknown whether this negative messaging could be detrimental to the mental health of older individuals, and whether the relatively uncommon positive messaging about older individuals could benefit their mental health. METHOD: To address these gaps, we designed age-stereotype interventions based on actual news stories that appeared during the pandemic, and divided them into negative and positive versions of what we term personified (i.e., individual-based) and enumerative (i.e., number-based) age-stereotype messaging. The negative versions of the 2 types of messaging reflected the age stereotype of decline, whereas the positive versions of the 2 types of messaging reflected the age stereotype of resilience. RESULTS: As expected, the exposure of older individuals to the negative-age-stereotype-messaging interventions led to significantly worse mental health (i.e., more anxiety and less peacefulness), compared to a neutral condition; in contrast, the positive-age-stereotype-messaging interventions led to significantly better mental health (i.e., less anxiety and more peacefulness), compared to a neutral condition. The findings were equally strong for the personified and enumerative conditions. Also as expected, the interventions, which were self-irrelevant to the younger participants, did not significantly impact their mental health. DISCUSSION: This is the first-known study to experimentally demonstrate that institutional ageism, and statistics that reflect stereotypes about older individuals, can impact mental health. The results demonstrate the need for media messaging aimed at empowering older individuals during the pandemic and beyond.