United States

Introduction: 
Among all professionals, physicians suffer from some of the highest burnout rates. While physician burnout has recently come to the forefront of many media cycles because of the COVID-19 pandemic, these high rates of burnout have long persisted in the field of medicine. In this study, we evaluate general trends of physician burnout and analyze gender differences over the last half-decade. 

Methods: Data provided by Medscapes Annual Burnout and Depression Surveys was analyzed for differences in reported burnout rates among all physicians in the United States (2017-2021). Univariate logistic regression was performed in order to compare differences in burnout rates between the various years and between different genders.

Results: Of the 71,000 physicians surveyed during the study period, the odds of reported burnout were significantly higher in 2018 (OR: 1.18, 95%CI 1.13-1.23), 2019 (OR: 1.09, 95%CI 1.04-1.14), 2020 (OR: 1.09, 95%CI 1.04-1.14), and 2021 (OR: 1.33, 95%CI 1.27-1.39) when compared to the year 2017. Over the five-year period, burnout was more commonly reported among female physicians (OR versus males: 1.65, 95%CI 1.60-1.70), with the effect estimate for burnout being greater among women versus men across all years as compared to 2017. In 2018 (versus 2017), odds of burnout among male physicians were 1.04, 95%CI 0.98-1.21, while ORfemales 1.08, 95%CI 1.00-1.16; 2019 ORmales 0.96, 95%CI 0.90-1.02, while ORfemales 1.00, 95%CI 0.93-1.07; 2020 ORmales 0.92, 95%CI 0.86-0.97 while ORfemales 1.13, 95%CI 1.04-1.22; and 2021 ORmales 1.13, 95%CI 1.07-1.21 while ORfemales 1.38, 95%CI 1.28-1.49.

Conclusion:
The general trend of increasing burnout rates, particularly among female physicians, highlights the need to implement modern solutions. Further investigation is warranted to discern specific variables &amp; their impact on these findings, so these solutions can be optimized.

2022 AMA Research Challenge

Gender Differences in Physician Burnout

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Introduction: 
Among all professionals, physicians suffer from some of the highest burnout rates. While physician burnout has recently come to the forefront of many media cycles because of the COVID-19 pandemic, these high rates of burnout have long persisted in the field of medicine. In this study, we evaluate general trends of physician burnout and analyze gender differences over the last half-decade. 

Methods: Data provided by Medscapes Annual Burnout and Depression Surveys was analyzed for differences in reported burnout rates among all physicians in the United States (2017-2021). Univariate logistic regression was performed in order to compare differences in burnout rates between the various years and between different genders.

Results: Of the 71,000 physicians surveyed during the study period, the odds of reported burnout were significantly higher in 2018 (OR: 1.18, 95%CI 1.13-1.23), 2019 (OR: 1.09, 95%CI 1.04-1.14), 2020 (OR: 1.09, 95%CI 1.04-1.14), and 2021 (OR: 1.33, 95%CI 1.27-1.39) when compared to the year 2017. Over the five-year period, burnout was more commonly reported among female physicians (OR versus males: 1.65, 95%CI 1.60-1.70), with the effect estimate for burnout being greater among women versus men across all years as compared to 2017. In 2018 (versus 2017), odds of burnout among male physicians were 1.04, 95%CI 0.98-1.21, while ORfemales 1.08, 95%CI 1.00-1.16; 2019 ORmales 0.96, 95%CI 0.90-1.02, while ORfemales 1.00, 95%CI 0.93-1.07; 2020 ORmales 0.92, 95%CI 0.86-0.97 while ORfemales 1.13, 95%CI 1.04-1.22; and 2021 ORmales 1.13, 95%CI 1.07-1.21 while ORfemales 1.38, 95%CI 1.28-1.49.

Conclusion:
The general trend of increasing burnout rates, particularly among female physicians, highlights the need to implement modern solutions. Further investigation is warranted to discern specific variables & their impact on these findings, so these solutions can be optimized.

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Background: Sociodemographic factors affect surgical outcomes and can present major obstacles to long-term survival and treatment of patients with head and neck cancers. This study aims to compare gender disparities in patients undergoing microsurgical glossectomy reconstruction. 

Methods: A retrospective cohort study was conducted of patients undergoing free flap reconstruction for glossectomy defects between June 2000 and April 2021. Demographics, oncological and surgical outcomes were examined, and differences in outcomes were compared between females and males. 

Results: 612 patients underwent glossectomy microsurgical reconstruction, of which 59.3% were female and 40.7% were male. Females had more comorbidities including obesity (female= 32.9%, male=23.8%, p=0.002), smoking (female=24.8%, male=14.5%, p<0.0001), alcohol consumption (female=22.9%, male=12.9%, p=0.002), and coronary artery disease (female=11.3%, male=2.4%, p<0.0001). More females also received pre-operative chemotherapy (female=4.7%, male=1.6%, p=0.04). Males had a longer average length of hospital stay (female=7.5 days, male=8.4 days, p<0.0001) and significantly more flap-related reoperations (female=0.18, male=0.22, p=0.04). In terms of the flap reconstruction, significantly more female patients underwent reconstruction using an ALT (female=31.1%, male=21.3%, p=0.007) and AMT flap (female=1.9%, male=0%, p=0.028), and using the facial artery, lingual, superior thyroid, and transverse cervical arteries as recipient vessels (60.22% facial, 13.72% lingual, 23.52% superior thyroid, 1.4% transverse cervical arteries, p=0.04). Female patients required larger couplers (2.5-4mm) than their male counterparts (female= 94.4%, male=85.9%, p<0.0001). In terms of surgical outcomes, more females experienced osteoradionecrosis (female=4.7%, male=1.6%, p=0.04) and donor wound healing complications (female=2.8%, male=0%, p=0.008) than males. More female patients were also in need of a tracheostomy (female=98.9%, male=95.9%, p=0.018). More male patients underwent reconstruction using a lateral arm free flap (female=3.6%, male=7.63%, p=0.027), and the ascending pharyngeal, descending pharyngeal, and external carotid arteries as recipient vessels (female=1.1%, male=5.8%, p=0.036). Significantly more male patients experienced partial flap loss complications (female=0.5%, male=2.81%, p=0.022), however, the total flap loss was comparable between both genders. 

Conclusion: This paper delineates gender discrepancies in surgical outcomes following microsurgical glossectomy reconstruction. This study showed that males and females experienced significant differences in comorbidities, length of hospital stay, number of flap-related reoperations, type of flap and recipient vessels used for reconstruction, coupler sizes, and post-operative complications. While male patients had a longer length of hospital stay and more

Gender Disparities in Glossectomy Reconstruction Outcomes

Background
Hepatitis B (HBV) is one of the most prevalent infectious diseases worldwide. It is preventable with vaccination and experts recommend screening for HBV immunity in all patients with chronic liver disease. The 2019 novel coronavirus (COVID-19) pandemic disrupted ambulatory care clinics throughout the United States, interfering with normal vaccination screening and administration. In the subsequent years after the pandemic began, clinicians and patients alike have had to play catch up on healthcare maintenance. This study was done to determine if the rate of screening and vaccination of patients with chronic liver disease for Hepatitis B changed in the subsequent years after the onset of the COVID-19 pandemic at our single institution.

Methods
A retrospective study was performed from January 2000 to January 2019 and from February 2022 to April 2022 on patients seen in the ambulatory clinic of our community-based hospital. The criteria to be vaccinated for Hepatitis B was patients with chronic liver disease (defined as cirrhosis, nonalcoholic fatty liver disease, alcoholic liver disease, autoimmune hepatitis, and transaminitis (ALT or AST >2x ULN) not immune to HBV. 790 patients were selected from the first period and 86 patients were selected from the second period.

Results
We found that there were increases in the rate of screening for HBV immunity (+6.4%) as well as the rate of vaccination against HBV (+4.7% complete immunization) in the post-COVID onset years compared to the pre-COVID onset years.

Conclusion
We believe that the increases in both screening rates and subsequent vaccination are due to both patient and physician driven motives. Our patients are requesting re-evaluation of vaccination history with increased compliance in vaccination course. We have also noticed a more thorough review of patient history by our physicians, focusing on what was missed during the years since the onset of the pandemic and prior. Further studies qualifying these observations are underway, however, we believe it is important to present these results now to demonstrate that we can continue to improve the care we provide in the outpatient setting despite the pandemic. In fact, the COVID-19 pandemic itself may have improved the overall care we provide for patients.

Hepatitis B Vaccination in Patients with Chronic Liver Disease in the Era of COVID-19

Background
High-deductible health plans (HDHPs) have grown rapidly in recent years, and now cover more than half of U.S. workers. Patients in HDHPs are liable for the costs of all cancer-related care until their annual deductible is met, with the exception of screening tests such as colonoscopy and mammography. Due to higher out-of-pocket costs, patients may postpone presenting for concerning symptoms or diagnostic testing, leading to delayed diagnosis. We sought to assess the impacts of HDHPs on the timing of metastatic cancer detection in a nationally representative cohort of cancer patients.

Methods
Using a cohort of privately insured patients age 18-64 in a national commercial and Medicare Advantage database (2003-2017), we studied 2,703 individuals with cancer whose employers mandated a switch from a low-deductible (≤$500) plan to a high-deductible (≥$1,000) plan. Our control group consisted of 43,005 contemporaneous individuals with cancer whose employers offered only low-deductible plans. Both groups had a 1-year baseline period when all members were enrolled in low-deductible plans. Members were followed for a maximum of 4 years. To address potential confounding, HDHP and control participants were matched on demographic variables, morbidity score, baseline health care utilization, cancer type and timing, follow-up duration, and employer characteristics. We assessed time to metastatic cancer diagnosis in the baseline and follow-up periods using a weighted Cox proportional hazards model. 

Results
The mean age of participants was 53; 59% were female. We detected 4,741 cases of metastatic progression. There were no differences in time to metastatic diagnosis in the baseline year, prior to the HDHP switch (HR 0.99, p = 0.93). After employer-mandated HDHP switch, cancer patients enrolled in HDHPs experienced later detection of metastatic cancer (HR 0.70, p = 0.04), equivalent to a delay of 8.5 months relative to the control group. 

Conclusion
Compared with conventional insurance, HDHPs are associated with delayed detection of metastatic cancer. These findings imply that cancer patients postpone seeking care for concerning symptoms or defer diagnostic testing when exposed to high cost-sharing. Future policy efforts should aim to protect cancer patients from burdensome costs-sharing requirements to ensure timely detection and treatment of metastatic cancer.

Impact of high-deductible health plans on delays in metastatic cancer diagnosis

Background: The annual bleeding risk for a brain arteriovenous malformation (AVM) is 2-8%, but obliterating the nidus reduces the risk to near population levels. We evaluate the outcomes of linear accelerator (LINAC)-based stereotactic radiosurgery (SRS) in the treatment of brain AVMs in our institutional cohort.
Methods: The study comprises patients treated with SRS for AVMs with follow-up care greater than one month from 2014-2021. Baseline characteristics were compared between pediatric and adults in the sample. Time-to-event analyses were conducted using the Kaplan-Meier survival method. Statistical significance is defined as P<0.05; all tests were two-tailed; no adjustments were made for multiple comparisons. Influences of baseline characteristics were evaluated using simple or multiple logistic regression.
Results: Among 29 qualifying patients with SRS-treated AVMs, a mean nidus volume of 6.26cm3 (SD=9.12, Range=0.13-40.2) and nidus max diameter of 24.8mm (SD=15.9, Range=2- 60) were observed. The distribution of Spetzler-Martin (SM) grades were SM1 (3.3%), SM2 (23.3%), SM3 (50%), SM4 (16.7%) and SM5 (6.7%). Pretreatment included intervention for hemorrhage (65.5%), embolization (43.3%), and microsurgery (13.3%). SRS for the AVM involved VMAT approach (50%), conformal arc (36.7%) and step-and-shoot IMRT (10%). The mean target dose was 18.72Gy (SD=1.7, Range=13.5-22) and delivered primarily in one fraction (86.7%). Obliteration occurred in 53.3% of patients and median time to obliteration was 27.1 months. Mortality was 10.3% with only one-cause specific death (AVM hemorrhage). Median follow-up was 23.6 months (Range=3-50.7). Comparing adult and pediatric patients, significant factors affecting likelihood of SRS delivery were sex (p=0.05), race (p=0.0089), nidus max diameter (p=0.033), pre-treatment SRS (p=0.027) and neurological deficits at presentation (p=0.0169). Likelihood of obliteration decreased with increasing nidus volume with an estimated 10% for each additional cm3 (OR=0.90, 95% CI=0.82-0.99, p=0.027). Adverse Events (AE) were observed in 55.2% of patients with a median time to AE of 11.4 months. Nidus max diameter significantly affected rate of AE (HR=1.36, 95% CI=1.03-1.8, p=0.031).
Conclusion: SRS resulted in 53.3% of our cohort achieving obliteration (mean follow-up: 23.6mos). Adverse events occurred in 55.2% of patients, but most were mild and resolved. Pediatric patients obliterate at similar rates to their adult counterparts but on an accelerated time course.

Institutional Experience of Linear Accelerator-Based Stereotactic Radiosurgery For Brain Arteriovenous Malformations 


Compassionate behavior, or the ability to help others in need, is a cornerstone of prosocial interactions. To benefit others, it is necessary for individuals not only to perceive the internal states or emotions of others but also to take appropriate actions. Yet, how mammalian neurons precisely link social-specific information with adaptive behavior has been a major challenge to understand. Here, we developed a place-preference assay that allowed mice to directly control in real-time the experience of a nearby conspecific partner while also allowing the animal’s own actions to be dissociated from the other’s identity. Behaviorally, we found that wild-type male mice consistently chose to reduce aversive experiences of familiar but not unfamiliar partners, actions not observed when visual and olfactory cues were blocked. By recording from anterior insular (AI) neurons, we identified cells that encoded task relevant information, including the social identity of the animal’s partners and their specific experiences. Dorsal anterior cingulate (dACC) neurons, by contrast, preferentially encoded information about the act of helping their partners, displaying changes in activity prior to making their decisions. Further, whereas information about the experience of others could be predominantly decoded from AI activity, information about the animal’s prosocial actions could be predominantly decoded from dACC activity; demonstrating a partitioning of information within the insular-prefrontal circuit. Finally, chemogenetic excitation of AI-to-dACC projectors but not dACC-to-AI projections increased compassionate behavior while inhibitions of both dACC to AI as well as AI to dACC projectors, on the other hand, decreased this behavior with familiar partners. Taken together, these findings identify a putative insular-prefrontal circuit for driving compassionate behavior and a mechanism that could allow insular neurons to instruct social-specific actions through prefrontal control.

Insular-prefrontal circuit driving compassionate social behavior

Background: Pneumocystis jirovecii pneumonia (PJP) remains a cause of mortality in HIV-negative patients. The clinical benefit of adjuvant corticosteroids in these patients is uncertain. This study aimed to determine if corticosteroids reduced mortality in a cohort of HIV-negative PJP patients and to propose a novel mechanism explaining corticosteroid benefits in patients regardless of HIV status. 
Methods: We examined a retrospective case series of patients diagnosed with PJP at the University of Colorado Hospital between 1995-2019. Data were collected from 71 PJP-infected patients. Twenty-eight patients were HIV-negative, and 43 were infected with HIV. We performed bivariate and forward, stepwise multivariable logistic regressions to identify predictors of mortality. 
Results: Common underlying conditions in HIV-negative patients were hematologic malignancies (28.6%), autoimmune disorders (25.9%), or solid organ transplantation (10.7%). HIV-negative patients had higher rates and duration of mechanical ventilation and ICU stay. Survival was significantly increased in HIV-negative patients receiving adjunct corticosteroids, with 100% mortality in patients not receiving corticosteroids vs 60% mortality in patients receiving corticosteroids (p=0.034). In an adjusted multivariable model, corticosteroids were associated with lower mortality (OR 13.5, 95% CI: 1.1-158.5, p= 0.039) regardless of HIV status. We propose corticosteroids reduce immune-mediated lysis of Pneumocystis organisms that curtails the surfactant-disabling effect of PJP internal contents. 
Conclusions: We found substantial mortality among HIV-negative patients with PJP, and adjuvant corticosteroid use was associated with decreased mortality. Decreased PJP lysis reduces surfactant disruption resulting from pneumocystis internal substances. Suppressing pneumocystis lysis best explains the adjuvant corticosteroid mortality-lowering effect.


Lower mortality associated with adjuvant corticosteroid therapy in non-HIV infected patients with pneumocystis jirovecii pneumonia

Background: Total knee arthroplasty (TKA) was removed from the “Inpatient Only List”(IOL) in 2018, enabling access to outpatient TKA for a broader cohort of beneficiaries. The effect of this reimbursement policy across the U.S. has yet to be fully explored. Therefore, we aimed to: 1) quantify the annual volume of inpatient/outpatient primary TKAs; 2) compare patient characteristics before/after 2018; and 3) compare annual trends in 30-day-readmissions, 30-day- complications, and healthcare utilization parameters for inpatient/outpatient TKAs.

Methods: The American College of Surgeons-National Surgical Quality Improvement Program was reviewed (January 2010 - December 2020) for patients who underwent primary TKA (n=470,456). The primary outcome was annual volumes of inpatient/outpatient TKA. Secondary outcomes included 30-day-readmissions, 30-day-reoperations, and 30-day-major/minor complications. Demographic characteristics and healthcare utilization parameters were compared between cohorts via Chi-square goodness of fit tests. All analyses were performed using R version 4.2.1.

Results: Overall, 89% had inpatient TKA (n=416,972) and 11% had outpatient TKA (n=53,854). Between 2017 and 2020, the volume of outpatient TKA grew by 2,025% (1,019 to 20,633), while inpatient TKA decreased by 47% (61,874 to 29,280). Patients who had outpatient TKA after 2018 were older (p<0.001), predominantly male (p<0.001), more commonly White (p<0.001), and had a greater proportion of ASA class III (p<0.001). Overall, patients who had inpatient TKA had higher rates of 30-day readmissions, reoperations, and complications. Average LOS and non-home discharges decreased for both cohorts.

Conclusion: Outpatient TKA increased exponentially since its removal from the IOL. The observed changes in comorbidity profiles and the increase in volumes of outpatient TKA were not associated with a rise in cumulative 30-day readmissions and complications, supporting the continued implementation of outpatient TKA. Further research and policy endeavors should focus on enhancing outpatient care pathways and building tools to identify patients who would benefit from inpatient TKA.

Major National Shifts to Outpatient Total Knee Arthroplasties in The United States: A 10-year Trends Analysis Of Procedure Volumes, Complications, and Healthcare Utilizations (2010 to 2020)

Characterization of Salivary Extracellular Vesicles in Preterm Infants

Mosaic Chromosomal Alterations Increase Risk of MGUS and Multiple Myeloma

The aim of this study was to create an accurate risk stratification tool for Covid-19 admissions. We looked at data from 1093 patients admitted to a regional hospital in Michigan with the primary diagnosis of Covid-19. Through various statistical approaches we analyzed factors that lead to worse outcomes. We then combined our analysis to determine which predictive factor had a stronger influence on Covid-19 mortality. Our end goal is to use this data to drive clinical decision making by identifying patients at greater risk of worse outcomes.

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