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While social media has grown in popularity in today's society, and has facilitated the dissemination of accurate and valuable information, it also raises the equally pressing concern of rampant proliferation of rumors and false news. The recent global outbreak of COVID-19 witnessed the explosion of fake and misleading health rumors in social media. Governments are tasked with providing the public with the right information to influence their behavior and engagement in emergency decision-making and optimally address the risks of rumor influence. Therefore, it is important to choose an appropriate response strategy in a rumor-induced health crisis. This study has two main objectives: to identify effective rumor response strategies by the government to stem the spread of rumor during a health crisis, and to examine the role of anxiety in this process using the Situational Crisis Communication Theory (SCCT). Online quasi-experimental data was collected from 245 Chinese participants who were exposed to a false social media rumor that potato chips could spread COVID-19 and were randomly assigned to one of three rumor response strategies (denial, refute or attack). According to the one-way ANOVA results, the effect of the refute response on rumor-related behavior is the most positive, whereas the effects of denial and attack are not significantly different. The results of the mediation model using PROCESS Macro reveal that anxiety partially mediates the relationship between rumor response strategies and rumor-related behaviors (rumor dissemination intentions and behavior intention to consume products);the refute strategy reduces public anxiety and has a positive effect on public behavioral intentions. This study is relevant to COVID-19 rumor research with regard to government rumor response strategies on social media using data-based descriptive and quantitative analysis. © SEARCH Journal 2023.
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Background Home Sleep Apnea Tests (HSAT) increases access to SDB diagnostic testing (Safadi, 2014). A previous study defined a reliable HSAT if: ≥4hours total recording time, an intelligible position signal and respiratory effort, airflow and oximetry for at least 80% of the night were recorded, however, admits no standardized criteria in the literature (Domingo, 2010). Aim To test the reliability of a self-applied HSAT using the Nox-A1 ambulatory system (NOX Medical, Iceland). Method Patients self-applied the HSAT guided by industry produced video and written instructions. Signals for the HSAT included;two electro-occulagrams (EOG), two sub-mental electromyograms (EMG), a single modified frontal encephalogram (EEG), a lead I ECG, single leg anterior tibialis EMG, chest and abdominal inductance respiratory effort, nasal pressure airflow, WristOx 2 3150 SpO2 (Nonin Medical, Inc., USA) and 3-D accelerometer and body position sensor. Analysed with ProFusion PSG 4 (Compumedics Limited, Australia) after importing data into Nexus. 33 consecutive studies were recorded during lock-down. Recording satisfactory if SpO2 signal and EEG present >80% of study, it was considered a failure if doctor requested test repeat. Results 33 subjects, age 43.1 ± 13.7 years, BMI 27.4 ± 6.0 kg/m2, 66.6% male. 81.8% of studies satisfactory. 6% of studies needed a repeat in-lab PSG due to 1) loss of oximetry & EEG and 2) loss of EEG Discussion 6% doctor request repeat in-lab PSG is comparable to a study (Lloberes, 2001) of partially self-applied HSAT. Demonstrated good reliability with this self-applied COVID-safe method of HSAT.
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Objective: To investigate how well do the middle school students in Wuhan know and perform COVID-19 prevention behaviors during the epidemic, and to identify the influencing factors that impact the wellness of students' performance on mask-wearing, hand washing, and other health-related behaviors. Method: We surveyed 21 middle schools in Wuhan using a self-developed questionnaire, evaluated the students' prevention behaviors, and used logistic regression to identify the influencing factors. Results: We investigated 6 858 students with an average age of (14. 5±1. 5) years, including 3 584 male students (accounting for 52. 3%). Grade, parents' education, and submission time are significantly related to the wellness of the three types of health behaviors (P<0. 05). Junior high school students showed a better performance in handwashing and other health-related behaviors than senior high school students (P<0. 05). Parents' education showed a significant impact on students' prevention behaviors in all aspects (P<0. 05). Conclusion: Enhancement is needed for the education of prevention behaviors among middle school students. Schools should pay more attention to students whose parents are of the lower level of education. © 2023 Editorial Board of Medical Journal of Wuhan University. All rights reserved.
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Background: Acinetobacter baumannii can reside in humans without causing infection or symptoms but can opportunistically cause community and nosocomial infections. Few studies from Taiwan have used national-level data to investigate antibiotic resistance rates of A. baumannii infections in the intensive care units (ICUs) of medical centers. Aim(s): This study determined the number of infection sites of A. baumannii and the resistance rates of carbapenem-resistant A. baumannii (CRAB) infections in ICUs in Taiwan, and identified trends over time, variations of infection site, and factors associated with resistance. Method(s): This study used the database provided by Taiwan's Centers for Disease Control. Yearly, Taiwan Nosocomial Infections Surveillance System Surveys from 2008 to 2019 were analyzed, including data on the site of infection and resistance rates of A. baumannii and patient and hospital characteristics. Result(s): On average, 21 hospitals as medical center/year participated in the survey, and 6803 A. baumannii isolates were identified. All isolates were health care-related infections. The most frequent sites of infection were the urinary tract (50.6%), respiratory tract (19.6%), bloodstream (18.2%), surgical wounds (4.3%), and others (7.4%). Infection rates were the highest in the urinary tract in 2019 (63.6%;P < 0.001). On average, the rate of carbapenem resistance was 66.6% (95% confidence interval: 63.1-70.1) among ICU patients at medical centers. Considerable regional differences were observed, with the highest rates of resistance in the central regions. Higher resistance rates were observed between 2019 and 2020 COVID-19 pandemic (74.2%). Conclusion(s): This is the first report on the prevalence of health care-related A. baumannii infection in Taiwan in 2008-2019. Several invasive diseases, such as urinary tract infections, are associated with higher rates of carbapenem resistance. The resistance rate of CRAB in Taiwan is exceptionally high. The current big-data-derived findings may inform future surveillance and research efforts in Taiwan.Copyright © 2023 Wolters Kluwer Medknow Publications. All rights reserved.
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With the outbreak of COVID-19, disinfection protection has become a necessary measure to prevent infection. As a new type of disinfectant, potassium peroxymonosulfate compound salt (PMS) has the advantages of good bactericidal effect, non-toxicity, high safety and stability. However, the current PMS products with irregular particle shapes lead to poor flowability, high hygroscopicity, poor stability of reactive oxygen species (ROS) and serious caking problems. In this work, an agglomeration-dissolution mechanism was designed to prepare spherical PMS particles with large size (>300 mm) and high sphericity (up to 90%), effectively addressing the above problems. Shaping (dissolution and abrasion) is the key to improving sphericity, which is mainly controlled by the design of the heating mode, residence time and stirring rate. Compared with the irregular PMS particles, the large spherical particles present better flowability (angle of repose decreased by 35.80%, Carr's index decreased by 64.29%, Hausner's ratio decreased by 19.14%), lower hygroscopicity (decreased by 38.0%), lower caking ratio (decreased by 84.50%), and higher stability (the monthly loss of ROS was reduced by 61.68%). The agglomeration -dissolution mechanism demonstrates the crystallization, agglomeration, dissolution and abrasion pro-cess of inorganic salt crystals, providing an opportunity to prepare high-end inorganic crystal materials with high-quality morphologies.(c) 2022 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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Due to the large height and span of indoor spaces, efficient indoor ventilation performance may be difficult to achieve using the side air supply for large halls, to control the indoor air pollutants or reduce the infection risk, such as the transmission of COVID-19 within the breathing zone of occupants. An efficient Ventilation Mode with Deflector and Slot air outlets (VMDS) was developed by this study. The use of a deflector with slot air outlets was introduced by utilizing jet collision and adhesion effect to accentuate the ventilation performance of the side air supply for the large space. The numerical simulation model used in this study was validated experimentally. The VMDS was compared with three other side air supply modes used in large spaces, and the results were evaluated comprehensively. The results show that VMDS is effective in reducing indoor air pollutant concentrations and transmission of infectious diseases in large spaces while satisfying the energy efficiency and thermal comfort requirements. Compared with the common side-supply and side-return ventilation modes, VMDS can reduce indoor air pollutant concentration by nearly 40%, reduce the transmission risk of infectious disease to less than 1% at a low air change rate and increase the ventilation efficiency from about 0.85 to about 1.2. In addition, VMDS can theoretically reduce ventilation energy consumption by about 85%. © The Author(s) 2022.
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In this study, we construct an investor sentiment indicator (SsPCA) to predict stock volatility in the Chinese stock market by applying the scaled principal component analysis (sPCA). As a new dimension reduction technique for supervised learning, sPCA is employed to extract useful information from six individual sentiment proxies and obtain the common variations to characterize the investor sentiment (SsPCA). The empirical results indicate that SsPCA is a significant and powerful volatility predictor both in and out of sample. We also employ the partial least squares (PLS)-based investor sentiment index, three extra sentiment measures in past studies, and six individual sentiment proxies for comparison, and find SsPCA outperforms them on predicting stock volatility in the Chinese stock market. More importantly, the predictability of SsPCA remains significant before and after the famous financial crises (the sub-prime mortgage crisis and Chinese stock market turbulence) and the spread of the pandemic (COVID-19). Additionally, our findings imply that SsPCA still plays an essential role in predicting sock volatility after considering the leverage effect. The robustness of SsPCA in volatility forecasting is further verified in various industry indices of the Chinese stock market. Finally, we state that the strong predictability of SsPCA is highly related to its dimensionality reduction. Our results indicate that SsPCA is a robust volatility predictor from various aspects and performs better compared with existing sentiment indicators. © 2022 Elsevier Inc.
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mRNA-based therapy has emerged as the most promising nucleic acid therapy in the fight against COVID-19. However, a safe and efficacious systemic delivery remains a challenge for mRNA therapy. Lipid nanoparticles (LNPs) are currently widely used in mRNA delivery vehicles. Here, series of ionizable LNPs are rationally designed. YK009-LNP is an optimal delivery platform to carry mRNA. YK009-LNP exhibited higher mRNA delivery efficiency, a more favorable biodistribution pattern, and better safety than the approved MC3-LNP. In addition, mRNA encoding SARS-CoV-2 Omicron receptor binding domain protein was synthesized, and intramuscular administration of mice with YK009-LNP-Omicron mRNA induced a robust immune response and immune protective effect. Our study provides a novel mRNA delivery vehicle with more powerful delivery efficiency and better safety than the approved LNPs. This article is protected by copyright. All rights reserved.
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Owing to the COVID-19 outbreak, sterilization of deep-ultraviolet light-emitting diodes (DUV LEDs) has attracted increasing attention. Effectively improving the radiative recombination efficiency and mitigating the efficiency degradation, mainly caused by electron leakage and nonradiative recombination, have also emerged as two of the main issues to be addressed. In this study, a DUV LED epitaxial structure with a novel electron-blocking layer (EBL) is proposed. The DUV LED with a luminescence wavelength of similar to 297 nm was formed by the stepwise variation of the Al component. Through the simulation and analysis of its performance parameters, we found that, compared to the conventional EBL structure, this new EBL structure not only reduces the electron leakage to the p-region effectively but also increases the hole injection into the active region, resulting in an increase in carrier concentration in the active region, a two-to-three-fold increase in the radiative recombination rate, and a 58% increase in the internal quantum efficiency, thus alleviating the efficiency droop and achieving a more efficient operation at high current densities. (C) 2022 Author(s).
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With the outbreak of COVID-19, disinfection protection has become a necessary measure to prevent infection. As a new type of disinfectant, potassium peroxymonosulfate compound salt (PMS) has the advantages of good bactericidal effect, non-toxicity, high safety and stability. However, the current PMS products with irregular particle shapes lead to poor flowability, high hygroscopicity, poor stability of reactive oxygen species (ROS) and serious caking problems. In this work, an agglomeration-dissolution mechanism was designed to prepare spherical PMS particles with large size (>300 μm) and high sphericity (up to 90%), effectively addressing the above problems. Shaping (dissolution and abrasion) is the key to improving sphericity, which is mainly controlled by the design of the heating mode, residence time and stirring rate. Compared with the irregular PMS particles, the large spherical particles present better flowability (angle of repose decreased by 35.80%, Carr's index decreased by 64.29%, Hausner's ratio decreased by 19.14%), lower hygroscopicity (decreased by 38.0%), lower caking ratio (decreased by 84.50%), and higher stability (the monthly loss of ROS was reduced by 61.68%). The agglomeration-dissolution mechanism demonstrates the crystallization, agglomeration, dissolution and abrasion process of inorganic salt crystals, providing an opportunity to prepare high-end inorganic crystal materials with high-quality morphologies. © 2022 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences
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OBJECTIVE: A lack of objective biomarkers is preventing the screening and diagnosis of COVID-19 combined with major depression disorder (COVID-19-MDD). The purpose of this study was to identify diagnostic biomarkers and gene regulatory mechanisms associated with autophagy; a crucial process significantly involved in the pathogenesis of COVID-19-MDD. MATERIALS AND METHODS: In this study, differentially expressed genes (DEGs) were screened using GSE98793 from the GEO2R analysis (GEO) database, and intersected with the COVID-19-related gene (CRGs) and autophagy-related genes (ARGs) to obtain common genes involved in. Then, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses of these common genes were performed. Subsequently, the transcription factor (TF)-gene regulatory network and comorbidity network were constructed. In addition, 10 drug candidates were screened using the DSigDB database. To identify diagnostic markers, we used LASSO regression. RESULTS: In total, 13 common genes were screened, which were primarily enriched in lysosomes, endoplasmic reticulum membranes, and other endomembrane systems also associated with autophagy. Additionally, these genes were involved in neurological cell signaling and have a functional role in pathways related to vascular endothelial growth factor, tyrosine kinase, autophagy, inflammation, immunity, and carcinogenesis. Tumors and psychiatric disorders were the most highly linked diseases to COVID-19. Finally, ten drug candidates and eight diagnostic markers (STX17, NRG1, RRAGD, XPO1, HERC1, HSP90AB1, EPHB2, and S1PR3) were screened. CONCLUSIONS: This is the first study to screen eight diagnostic markers and construct a gene regulatory network for COVID-19-MDD from the perspective of autophagy. The findings of our study provide novel insights into the diagnosis and treatment of COVID-19-MDD.
Subject(s)
COVID-19 , Depressive Disorder, Major , Humans , Computational Biology , COVID-19/genetics , Vascular Endothelial Growth Factor A , Biomarkers , Machine Learning , Autophagy/geneticsABSTRACT
With the rapid development of computer technology, the traditional teaching mode has been changed. Computer technology has played a decisive role in promoting teaching reform. This paper mainly discusses the implementation and experience of the mixed teaching mode of preventive medicine course based on the network teaching platform under the epidemic situation of novel coronavirus pneumonia. The mixed teaching mode of "online live teaching + MOOC + TBL"was used for the study on the online course of preventive medicine, and a mixed teaching mode of preventive medicine course based on the network teaching platform was constructed. In the teaching practice for clinical medical students, it was found that this teaching model could help to improve their teaching satisfaction, performance, autonomous learning ability, and ability to obtain information and evaluate information, through which a satisfactory teaching result has been achieved. The results indicate that this teaching mode may be an efficient and innovative teaching mode, and an effective way to improve the quality of education and teaching, worth popularizing. © 2022 Owner/Author.
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A large number of antibiotics have been discharged into rivers by human activities, posing a threat to aquatic ecosystems. The surface water of the Yellow River Basin also suffers antibiotic pollution, which hinders the improvement in the aquatic ecological environment. This study investigated and analyzed the characteristics and assessed the ecological risks of antibiotic pollution in surface water bodies such as canals, rivers and fish ponds in Kaifeng, Henan Province, which is a key city along the lower reaches of the Yellow River. The test results are as follows. A total of 15 types of antibiotics were detected in the surface water. They had a total antibiotic concentration of 12.2–249.9 μg/L, of which tetracyclines (TCs) and quinolones accounted for the highest percentages. Six types of quinolones had detection rates of up to 100%, and doxycycline (DC) and oxytetracycline (OTC) had average concentrations of 29.52 μg/L1 and 13.71 μg/L, respectively. The major canals with water diverted from the Yellow River had total concentrations of quinolones and TCs of 22. 0 μg/L and 14.9 μg/L, respectively, which were higher than those in previous studies. This phenomenon may be related to the decrease in the water flow of the Yellow River during the dry season and the increase in the antibiotic consumption of residents in the context of the Covid-19 outbreak. The upper reaches of the Huiji River in the Xiangfu District had higher antibiotic content than other districts in Kaifeng. Specifically, TCs accounted for 72.38%–91.84% of all antibiotics, and the DC and OTC concentrations were significantly higher than other antibiotics in the upper reaches. As indicated by the ecological risk assessment results, TCs had the highest ecological risks to green algae. Among them, DC had medium-high risks;TC, OTC, and chlortetracycline (CTC) had medium-high risks;trimethoprim (TMP) and lomefloxacin (LOM) had low risks;other TC antibiotics had no risk. Compared with green algae, most antibiotics showed higher ecological risks to daphnia and lower ecological risks to fish. DC and OTC dominate antibiotic pollutants in the surface water in Kaifeng City, and especially in Xiangfu District, where DC and OTC have medium-high risks. The TCs in the major Yellow River showed medium risks to both green algae and daphnia. It can be speculated that the antibiotic pollution in the Yellow River might pose a certain threat to the ecological security of water in Kaifeng City. ©2022 China Geology Editorial Office. © 2022 Editorial Office of China Geology. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd
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This paper proposes an outdoor barbecue restaurant environment control system based on AIoT technology in Penghu, Taiwan, which provides a more convenient restaurant management method for barbecue restaurant service providers and improves the comfort of diners in barbecue restaurants. The proposed system can automatically adjust the temperature and humidity of the restaurant, which uses image processing technology to count the number of diners in the restaurant and set up cameras in the food storage refrigerator to identify whether there are empty plates in time. In response to the COVID-19 epidemic when entering a restaurant, mask identification is carried out using object recognition so that diners who wear masks abnormally can be detected in time, and the virus infection problem can be reduced. All information can be monitored through the proposed IoT monitoring platform. © 2022 IEEE.
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Background: Published data suggest no increased rate of fare of autoimmune infammatory rheumatic diseases (AIIRD) after COVID-19 mRNA vaccination;however, the studies are limited by small sample size, short follow up or at risk of selection bias (voluntary physician reports or patient surveys). Objectives: To study fares of AIIRD within three months of the frst dose of an anti-SARS-COV2 mRNA vaccine. Methods: A retrospective cohort study of consecutive AIIRD patients ≥ 12 years old, across six public hospitals in Singapore who received at least one dose of an mRNA (Pfzer/BioNTech or Moderna) vaccine. Data were censored at the frst post-vaccine clinic visit when the patient had fared or if ≥ three months had elapsed since the frst dose of the vaccine, whichever came frst. Predictors of fare were determined by Cox proportional hazards analysis and time to fare was examined using a Nelson Aalen cumulative hazard estimate (Figure 1). Results: 2339 patients (74% Chinese, 72% female) of median (IQR) age 64 (53, 71) years were included in the interim analysis (Table 1). 2112 (90%) had the Pfzer/BioNTech vaccine and 195 (8%) had Moderna, with a median (IQR) interval of 21 (21, 23) days between the two doses. The most common AIIRD diagnoses were Rheumatoid arthritis (1063, 45%), Psoriatic arthritis (296, 12.6%) and Systemic lupus erythematosus (SLE) (288, 12.3%). 186 (8%) were treated with biologics/targeted disease modifying agents. 2125 (91%) patients were in low disease activity or remission. Treatment was interrupted for vaccination in only 18 (0.8%) patients. Seven (0.3%) patients had previous COVID-19 infection. 452 (19%) fares were recorded during 9798.8 patient-months [4.6/100 patient-months, median (IQR) follow up duration 4.2 (3.3, 5.3) months], of which 272 (11.6%) patients fared within the 3-month period of interest and 180 (7.7%) fared outside of the 3-month period (Table 1). Median (IQR) time-to-fare was 40.5 (18, 56.6) days. 60 (22.1%) were mild and self-limiting, 170 (62.5%) were mild-moderate and 42 (15.4%) were severe. 190 (69.8%) of those who fared required escalation of treatment and 15 (5.5%) required hospital admission. 239 (10.2%) had improved disease activity after the vaccine. On multivariate Cox regression analysis, patients in the oldest age tertile [median (IQR) 74 (71, 79) years] were less likely to fare [HR 0.80 (95% CI 0.63, 1.00), p = 0.05] Patients with infammatory arthritis (compared with connective tissue disease, vasculitis and others) and patients with baseline active disease were more likely to fare [HR 1.72 (95% CI 1.35, 2.20), p < 0.001 and 1.82 (95% CI 1.39, 2.39), p < 0.001 respectively] Conclusion: There was a moderately high rate of AIIRD fares after mRNA vaccination;however, there was no clustering of fares in the immediate post-vaccine period to suggest causality. Older patients were less likely to fare, while those with infammatory arthritis and active disease at baseline were more likely to fare.
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With the rapid outbreak of the coronavirus disease 2019 (COVID-19) pandemic, considerable concerns about the safety of systemic treatments of immune-mediated dermatologic disorders has been raised by dermatologists and their patients. We aimed to perform a rapid review of latest American and European guidelines on the use of systemic treatments in patients with immune-mediated dermatologic disorders and confirmed COVID-19 infection and to provide recommendations to inform practice. Based on the current limited guidelines and evidence, systemic corticosteroids should not be abruptly discontinued and the lowest effective dose should be continued. Systemic immunosuppressants (including methotrexate, cyclosporine, azathioprine, cyclophosphamide, and leflunomide), biologics, and sulfasalazine should be withheld in patients with confirmed COVID-19 infection. Whether to continue Janus kinase inhibitors should be determined following a shared decision-making process between dermatologists and patients after considering patients' medical conditions and risk for severe COVID.
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Under the background of Covid-19 sweeping the world, safe and reasonable passenger flow management strategy in subway stations is an effective means to prevent the spread of virus. Based on the social force model and the minimum cost model, the movement and path selection behavior of passengers in the subway station are modeled, and a strategy for passenger flow management to maintain a safe social distance is put forward. Take Qingdao Jinggangshan Road subway station of China as the simulation scene, the validity of the simulation model is verified by comparing the measured value and simulation value of the time required for passengers from getting off the train to the ticket gate. Simulation results indicate that controlling the time interval between incoming passengers at the entrance can effectively control the social distance between passengers and reduce the risk of epidemic infection. By comparing the evacuation process of passengers under different initial densities, it is found that the greater the initial density of passengers is, the longer the passengers are at risk social distance. In the process of passenger emergency evacuation, the stairs/escalators and ticket gates are bottleneck areas with high concentration of passenger density, which should be strictly disinfected many times on the basis of strictly checking the health code of incoming passengers and controlling the arrival time interval. The simulation results of this paper verify the harmfulness of passenger emergency evacuation without protective measures, and provide theoretical support for the operation and management of subway station under the epidemic situation.
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Background: The present study aimed to clarify the impact of the 2020 COVID-19 pandemic on emergency management of acute type A aortic dissection. Methods: We consecutively enrolled 337 acute type A aortic dissection (ATAAD) patients at emergency room in Fuwai Hospital (Beijing, China) from January to June during the 2020 COVID-19 epidemic (n = 148) and the same period in 2019 as the historical control (n = 189). The primary outcome was defined as in-hospital death. Other outcomes included automatic discharge during emergency admission. The factors with significant differences before and after the epidemic were compared and analyzed by stages with the study endpoint to clarify their changes in different stages of the epidemic. Results: There was no significant difference in in-hospital mortality (35 (20.5%) vs. 23 (17.4%), p = 0.472). Compared with year 2019, proportion of patients receiving surgical treatment decreased significantly (74 (50.0%) vs. 129 (68.25%), p < 0.001). The surgery time of ATAAD patients in 2020 was significantly shorter (6.46 [5.52, 7.51] vs. 7.33 [6.00, 8.85] hours, p = 0.01). The length of stay in the emergency department significantly differed at each stage. Conclusions: Our study demonstrated a significant reduction in the number of ATAAD patients and surgical treatment during COVID-19 outbreak. The surgical strategy of patients changed, but the overall mortality was largely the same. Patients undergoing surgery had a trend toward longer interval from the onset to the operating room, but they tended to be normal at the end of the epidemic. Proper epidemic prevention policies may avoid COVID-19 hitting patients who are not infected with the virus to the greatest extent.
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Objective To explore the impact of Coronavirus disease 2019 (COVID-19) epidemic on career choosing perspective among medical students and to analyze the related factors. Methods Semi-structured telephone interviews were conducted during March 1-25 2020 among 19 medical students of 8-year program from Peking Union Medical College. The grounded theory and thematic analysis were applied to code the data and identify categories and factors. Results Among the 19 respondents aged 19-26 years, 9 were males and 10 were female;10 were at the clinical stage, and 9 were at the premedical stage;3 respondents had family members involved in medical profession. Thematic analysis identified 6 main categories that affect the variability of medical students' career prospects under the COVID-19 pandemic. The 6 themes were individual characteristics of students;occupational characteristics;systemic factors;COVID-19 events;stressors of physicians and influence of job satisfaction. The outbreak affected everyone's mind of future career to varying degrees. The participants had been exposed to more negative aspects, while only one participant changed her career intention. There were conflicting views on whether to choose some specialties in future, such as respiratory medicine, infectious disease and critical care medicine. The participants feel more pressure as a doctor from the attitude of the public. Almost all participants mentioned feeling unsafe due to the high risk of occupational exposure and doctor-patient relationships. Most valued the support from their family, faculty, classmates, and volunteers. Many participants expressed their hope to improve the medical policies and systems. Conclusions The influence of COVID-19 outbreak on medical students' career choosing can be positive as well as negative in different degrees. However, we found no evidence that it altered their perspectives substantially. © 2022 Chinese Journal of Psychiatry. All rights reserved.