Social distancing

社会距离
  • 文章类型: Journal Article
    (1)背景:社会距离成为限制SARS-CoV-2病毒传播的中心策略。我们探讨了以色列成年人在第一次全国封锁结束时的自我报告依从性(SRA)和与SRA相关的因素。(2)方法:我们于2020年5月和6月对820名18至70岁的以色列成年人进行了横断面消费者小组调查。我们收集了SRA与社会距离测量的数据,社会人口统计学变量,对与大流行有关的危险和社会距离措施提供的保护的看法,以及连贯感(SoC)。(3)结果:60%的受访者表示遵守7项措施。较高的SoC与较高的SRA相关(p=0.04),与收入有关,婚姻状况,年龄,职业,和教育。犹太人的SRA高于阿拉伯人(犹太人:平均值=10.5,SD=4.5;阿拉伯人:平均值=9.1,SD=4.1,p<0.001),男性(男性:平均值=10.8,SD=4.7;女性:平均值=9,SD=4.1;p=0.003)。SoC对保护和危险的感知与较高的SRA相关(分别为p=0.42,p<0.001和p=0.005).单身人士报告的SRA水平高于恋爱关系中的人(合作伙伴:平均值=9.7,SD=4.2,非合作伙伴:平均值=10.9,SD=4.7,p=0.033)。(4)结论:在第一次封锁退出时,对社会距离措施的遵守程度很高,犹太人,单身和男性以色列人更有可能遵守指导方针。我们确定了非依从性和相关因素的风险人群,首次报告SoC和SRA之间的相关性。需要进一步的研究来评估这些因素在犹太人和阿拉伯人口中的作用。
    (1) Background: Social distancing became a central strategy employed to limit the spread of the SARS-CoV-2 virus. We explore self-reported adherence (SRA) and factors associated with SRA among Israeli adults at the end of the first national lockdown in Israel. (2) Methods: We conducted a cross-sectional consumer panel survey of 820 Israeli adults aged 18 to 70 in May and June 2020. We collected data on the SRA to the social distancing measures, sociodemographic variables, perceptions of pandemic-related danger and of protection provided by the social distancing measures, as well as Sense of Coherence (SoC). (3) Results: 60% of respondents reported complying with 7 measures. Higher SoC was associated with higher SRA (p = 0.04), and was related to income, marital status, age, profession, and education. The SRA was higher among Jews than Arabs (Jews: Mean = 10.5, SD = 4.5; Arabs: Mean = 9.1, SD = 4.1, p < 0.001) and among males (Males: Mean = 10.8, SD = 4.7; Females: Mean = 9, SD = 4.1; p = 0.003). SoC, perception of protection and perception of danger were associated with higher SRA (p = 0.42, p < 0.001 and p = 0.005 respectively). Single people reported higher levels of SRA than people in relationships (Partnered: Mean = 9.7, SD = 4.2, Non-partnered: Mean = 10.9, SD = 4.7, p = 0.033). (4) Conclusions: At the time of exit from the first lockdown, compliance with social distancing measures was high, with Jewish, single and male Israelis more likely to adhere to the guidelines. We identified the populations at risk for non-adherence and associated factors, reporting for the first time the correlation between SoC and SRA. Further research is needed to assess the role of these factors in Jewish and Arab populations.
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  • 文章类型: Journal Article
    社会距离(SD)是在致命和高传染性COVID-19大流行期间减少病毒传播的有效方法。使用前瞻性纵向设计,本研究探讨了大学生样本(n=285)中五大特征与SD变化的关系,并使用线人报告复制这些发现。探索了自决理论的自主动机和内在社区价值观的概念,作为将特征与SD联系起来的潜在机制。特质一致性和责任心较高的人参与了更多的SD,因为他们更有效地将指南的重要性和价值内化为对社区福利的关注。线人报告证实,特质宜人性和尽责性与更多的SD相关。这些结果增强了我们对与更好的内在化和遵守公共卫生指南相关的个体差异的理解,并可以为将来在类似危机中的干预提供信息。
    Social distancing (SD) was an effective way of reducing virus transmission during the deadly and highly infectious COVID-19 pandemic. Using a prospective longitudinal design, the present study explored how the Big 5 traits relate to variations in SD in a sample of university students (n = 285), and replicated these findings using informant reports. Self-determination theory\'s concepts of autonomous motivation and intrinsic community values were explored as potential mechanisms linking traits to SD. Individuals who were higher on trait agreeableness and conscientiousness engaged in more SD because they more effectively internalized the importance and value of the guidelines as a function of their concerns about the welfare of their communities. Informant reports confirmed trait agreeableness and conscientiousness to be associated with more SD. These results enhance our understanding of individual differences associated with better internalization and adherence to public health guidelines and can inform future interventions in similar crises.
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  • 文章类型: Journal Article
    为了应对Covid-19大流行,大多数国家实施了物理距离措施。许多心理健康专家警告说,通过增加社会孤立和焦虑,这些措施可能会对社会心理健康产生负面影响。然而,通过遵守这些措施在社会上与他人结盟也可能有益于福祉。
    我们使用在大流行开始的3个月内每两周从115个国家的参与者收集的跨国调查数据(N=6675)检查了这两个相反的假设。参与者报告了他们的健康状况,对他们对Covid-19有多脆弱的看法(即,高感染风险)以及它们有多大,以及他们社交圈和国家中的其他人,坚持疏远措施。
    线性混合效应模型表明,作为一个女人,受教育程度较低,独居和认为对Covid-19的高度脆弱性是幸福感较差的危险因素。年轻(18-25岁)与较低的幸福感有关,但纵向分析显示,年轻人的健康状况在3个月内得到改善。与广泛认为物理距离措施会对福祉产生负面影响的观点相反,结果表明,即使对于高危人群,遵循指南也与健康呈正相关。
    这些发现提供了一个重要的对应观点,即诸如物理距离之类的大流行遏制措施无疑会对健康产生负面影响。尽管大流行对社会心理健康的总体负担,与他人的社会协调仍然有助于积极的福祉。大流行表明了我们适应挑战的倾向,特别强调了社会一致性如何增强韧性。
    In response to the Covid-19 pandemic, most countries implemented physical distancing measures. Many mental health experts warned that through increasing social isolation and anxiety, these measures could negatively affect psychosocial wellbeing. However, socially aligning with others by adhering to these measures may also be beneficial for wellbeing.
    We examined these two contrasting hypotheses using cross-national survey data (N = 6675) collected fortnightly from participants in 115 countries over 3 months at the beginning of the pandemic. Participants reported their wellbeing, perceptions of how vulnerable they were to Covid-19 (i.e., high risk of infection) and how much they, and others in their social circle and country, were adhering to the distancing measures.
    Linear mixed-effects models showed that being a woman, having lower educational attainment, living alone and perceived high vulnerability to Covid-19 were risk factors for poorer wellbeing. Being young (18-25) was associated with lower wellbeing, but longitudinal analyses showed that young people\'s wellbeing improved over 3 months. In contrast to widespread views that physical distancing measures negatively affect wellbeing, results showed that following the guidelines was positively associated with wellbeing even for people in high-risk groups.
    These findings provide an important counterpart to the idea that pandemic containment measures such as physical distancing negatively impacted wellbeing unequivocally. Despite the overall burden of the pandemic on psychosocial wellbeing, social alignment with others can still contribute to positive wellbeing. The pandemic has manifested our propensity to adapt to challenges, particularly highlighting how social alignment can forge resilience.
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  • 文章类型: Journal Article
    BACKGROUND: Palliative and hospice care facilities face different challenges emerging from the COVID-19 pandemic. In particular, this results from the high age and pre-existing diseases of patients as well as the physically close contact between staff and patients.
    OBJECTIVE: The aim of this study was to identify existing strategies, guidelines and recommendations in Germany and other countries with respect to addressing the challenges of the COVID-19 pandemic in palliative and hospice care.
    METHODS: The databases PubMed, CINAHL, Web of Science and PsycInfo were searched as part of a scoping review. Additionally, Google Search and Google Scholar were used to identify \"grey literature\". All German and English language articles related to inpatient palliative and hospice care were included which were published between January 2020 and August 2021.
    RESULTS: A total of 51 publications were included in the analysis. The identified measures can be clustered into 10 different categories: infection control measures, structural measures, visiting regulations, communication structures, education and training, psychosocial support measures, specific considerations for people with dementia, advance care planning, farewell and measures after death.
    CONCLUSIONS: With respect to addressing the COVID-19 pandemic, the primary focus is on measures to enable communication between patients, staff and relatives, psychosocial support measures, structural measures and recommendations for training and education of all stakeholders. Measures for the palliative care of people with dementia in times of a pandemic as well as the farewell and grief management of bereaved families received less attention.
    UNASSIGNED: HINTERGRUND: Palliativ- und Hospizeinrichtungen sind durch die COVID-19-Pandemie besonderen Herausforderungen ausgesetzt. Gründe dafür sind insbesondere das hohe Alter und bestehende Vorerkrankungen der Patienten sowie ein körperlich naher Kontakt zwischen Mitarbeitern und Patienten.
    UNASSIGNED: Ziel der vorliegenden Studie ist es, bestehende Strategien, Richtlinien und Empfehlungen zum Umgang mit den Herausforderungen der COVID-19-Pandemie in der Palliativ- und Hospizversorgung zu ermitteln, die in Deutschland und anderen Ländern zum Einsatz kommen.
    METHODS: Im Rahmen eines Scoping Reviews wurden die Datenbanken PubMed, CINAHL, Web of Science und PsycInfo durchsucht. Zusätzlich wurde „graue Literatur“ über Google Search und Google Scholar recherchiert. Eingeschlossen wurden alle deutsch- und englischsprachigen Artikel im Zeitraum Januar 2020 bis August 2021, die sich auf die stationäre Palliativ- und Hospizversorgung beziehen.
    UNASSIGNED: Insgesamt wurden 51 Veröffentlichungen in die Analyse aufgenommen. Die identifizierten Maßnahmen lassen sich 10 verschiedenen Kategorien zuordnen: Maßnahmen zur Infektionskontrolle, strukturelle Maßnahmen, Besuchsregelungen, Kommunikationsstrukturen, Schulung und Aufklärung, psychosoziale Unterstützungsmaßnahmen, spezifische Überlegungen für Menschen mit Demenz, vorausschauende Pflegeplanung, Abschiednahme sowie Maßnahmen nach dem Tod.
    CONCLUSIONS: Bei der Bewältigung der COVID-19-Pandemie dominieren insbesondere Maßnahmen zur Ermöglichung der Kommunikation zwischen Patienten, Mitarbeitern und Angehörigen, psychosoziale Unterstützungsmaßnahmen, strukturelle Maßnahmen und Empfehlungen zur Schulung und Aufklärung aller Beteiligten. Strategien zur Palliativversorgung von Menschen mit Demenz in Pandemiezeiten sowie zu Abschiednahme und Trauerbewältigung von Hinterbliebenen finden weniger Beachtung.
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  • 文章类型: Journal Article
    在整个COVID-19大流行期间,科学和公共卫生界越来越关注了解年轻人的身体疏远行为以及年轻人对病毒增强和社区传播的作用。在本研究中,我们在2020年4月调查了来自大西雅图地区的560名年轻人(22-28岁),在全州范围内的“就地避难所”建议中,检查年轻人自我报告对身体距离指南的遵守情况。自我报告的措施被用来识别强的支持者和差的支持者,然后,我们在参与特定的身体距离行为和与身体距离依从性有关的饮酒行为方面进行了比较。我们发现大多数年轻人被归类为强势信徒,而且贫穷的信徒报告说,更频繁地违反了身体距离准则,包括让朋友到他们的住所或去其他住所。贫困的听众也更有可能从事高风险的饮酒行为,比如大量的偶发性饮酒,与那些被归类为强势信徒的年轻人相比。我们的结果提供了初步证据,表明从事高风险饮酒的年轻人可能面临更大的不遵守政府推荐的身体距离指南的风险。对COVID-19大流行期间年轻成年人行为的更深入了解可以更好地为公共卫生宣传提供信息,以提高目前的身体距离依从性,以及为未来的传染性健康危机做准备,这可能需要社会层面遵守行为规范。
    Throughout the COVID-19 pandemic, the scientific and public health communities have become increasingly focused on understanding young adults\' physical distancing behaviors and the role that young adults have on viral potentiation and community spread. In the present study, we surveyed a group of 560 young adults (ages 22-28) from the greater Seattle area in April 2020, during statewide \"shelter-in-place\" recommendations, to examine young adults\' self-reported adherence to physical distancing guidelines. Self-report measures were used to identify strong adherers and poor adherers, which we then compared in terms of engagement in specific physical distancing behaviors and alcohol use behaviors pertaining to physical distancing adherence. We found that most young adults are classified as strong adherers, and that poor adherers reported more frequent violations of physical distancing guidelines including having friends over to their residence or going over to other residences. Poor adherers were also significantly more likely to engage in high-risk alcohol use behavior, such as heavy episodic drinking, compared to those young adults who were classified as strong adherers. Our results provide initial evidence that young adults who engage in high-risk drinking may be at greater risk for non-adherence to government recommended physical distancing guidelines. This deeper understanding of young adult behavior during the COVID-19 pandemic can better inform public health outreach to increase physical distancing adherence currently, as well as in preparation for future contagious health crises that may require societal-level adherence to behavioral guidelines.
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  • 文章类型: Journal Article
    In March 2020, the German government enacted measures on movement restrictions and social distancing due to the COVID-19 pandemic. As this situation was previously unknown, it raised numerous questions about people\'s perceptions of and behavioral responses to these new policies. In this context, we were specifically interested in people\'s trust in official information, predictors for self-prepping behavior and health behavior to protect oneself and others, and determinants for adherence to social distancing guidelines. To explore these questions, we conducted three studies in which a total of 1,368 participants were surveyed (Study 1 N=377, March 2020; Study 2 N=461, April 2020; Study 3 N=530, April 2021) across Germany between March 2020 and April 2021. Results showed striking differences in the level of trust in official statistics (depending on the source). Furthermore, all three studies showed congruent findings regarding the influence of different factors on the respective behavioral responses. Trust in official statistics predicted behavioral responses in all three studies. However, it did not influence adherence to social distancing guidelines in 2020, but in 2021. Furthermore, adherence to social distancing guidelines was associated with higher acceptance rates of the measures and being older. Being female and less right-wing orientated were positively associated with guidelines adherence only in the studies from 2020. This year, political orientation moderated the association between acceptance of the measures and guideline adherence. This investigation is one of the first to examine perceptions and reactions during the COVID-19 pandemic in Germany across 1year and provides insights into important dimensions that need to be considered when communicating with the public.
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  • 文章类型: Journal Article
    在2019年冠状病毒病(COVID-19)之后,社会距离有助于遏制这一流行病。为了最大限度地发挥其效力,调查预测遵守社会距离指南的心理因素并检查相应的干预措施是至关重要的。我们专注于在if-then计划中的个体差异,自我控制,和无聊,并测试了基于if-then计划的干预措施。我们结合观测和实验方法进行了两波纵向研究。参与者(N=574,35.7%为女性,年龄:M=37.5岁,SD=10.8)报告了他们对社交距离指南的坚持以及T1时坚持的难度,以及if-then计划的特质指标,自我控制,和无聊。之后,他们被随机分配到if-then计划干预中以提高依从性,或控制干预。在T2的一周后,参与者再次报告了他们的依从性和感知的依从性困难。多元回归和结构方程模型被用来确定特征如果-然后规划,自我控制,无聊预测坚持,并检查if-then计划干预的效果。特质如果-然后规划,自我控制,无聊与T1依从性有关,而只有if-then计划和无聊可以预测T2依从性。没有出现if-then计划干预的整体治疗效果;然而,遵守干预措施的参与者(75.6%)在一段时间内的依从性高于对照组.总之,如果-然后计划的个体差异,自我控制,无聊预示着坚持社交距离准则。If-then计划干预措施很有希望,但需要采取进一步措施来确定合规性。
    In the wake of the Coronavirus Disease 2019 (COVID-19), social distancing is instrumental for containing the pandemic. To maximize its effectiveness, it is paramount to investigate psychological factors that predict adherence to social distancing guidelines and examine corresponding interventions. We focused on individual differences in if-then planning, self-control, and boredom, and tested an intervention based on if-then planning. We conducted a two-wave longitudinal study combining observational and experimental methods. Participants (N = 574, 35.7% female, age: M = 37.5 years, SD = 10.8) reported their adherence to social distancing guidelines and the perceived difficulty of adherence at T1, along with trait measures of if-then planning, self-control, and boredom. Afterwards, they were randomly assigned to an if-then planning intervention to increase adherence, or to a control intervention. One week later at T2, participants again reported their adherence and the perceived difficulty of adhering. Multiple regression and structural equation modeling were used to establish whether trait if-then planning, self-control, and boredom predicted adherence, and to examine the effects of the if-then planning intervention. Trait if-then planning, self-control, and boredom were associated with T1 adherence, while only if-then planning and boredom predicted T2 adherence. No overall treatment effect of the if-then planning intervention emerged; however, participants who complied with the intervention (75.6%) maintained higher levels of adherence over time than control participants. In sum, individual differences in if-then planning, self-control, and boredom predicted adherence to social distancing guidelines. If-then planning interventions are promising but require further steps to ascertain compliance.
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  • 文章类型: Journal Article
    背景和目标:行动,不要害怕,是2019年冠状病毒传染病(COVID-19)大流行的前进之路。自2020年初以来,世界各国都面临着严重急性呼吸道综合症冠状病毒2型(SARS-CoV-2)感染导致COVID-19导致国家关闭的难题,因此,重新开放需要一个各国可以实施的明确可以理解的计划。重新开放一个国家的医疗保健好处更有可能超过与大流行相关的持续关闭的好处。与大流行相关的关闭导致无数的紧急护理评估被推迟或避免。此外,急性和慢性疾病的常规护理,包括评估,诊断,和治疗,也被推迟了。隔离,收入损失,和恐惧导致了精神健康状况或加剧了现有状况。不良后果的程度是未知的,最终可能代表不可估量的危险和发病率,甚至死亡。SARS-CoV-2的流行造成了对COVID-19的恐惧气氛,这种气氛直接和间接地伤害了世界人口。由于这导致发病率和死亡率上升,制造经济混乱,教育系统几乎系统性崩溃,没有精心描述的计划,这项研究的目的是提供指导方针,为安全开放一个国家提供前进的道路。医生通常由他们的教育装备,培训,跨学科的经验具有独特的理解能力,坐标,教其他医生,企业主,以及市政府领导的指导方针。因此,医生可能会带头重新开放一个国家,包括开办企业,教育设施,和宗教场所,同时将SARS-CoV-2感染的风险降至最低。材料和方法:环境空气学科之间的文献综述,卫生,社交互动,医学测试,疫苗接种,保护,和疾病预防和安全性允许可识别的干预措施的概念化和最终起源,这些干预措施可以减少环境中的病毒载量或使病毒从复制中失活。基于涉及病毒颗粒的消除或失活的原则选择每个指南。随着病毒载量的减少或复制失活,这些指导方针的实施预计将允许一个安全水平提高的国家重新开放。结果:指南确定,包括空气交换(通风),空气过滤,个人防护过滤装置(口罩),手部卫生,社交距离,筛选和测试,疫苗,高风险患者保护,医疗管理,和辅助疗法,被描述和引用。结论:由于大流行主要是公共卫生问题,前进的道路最好由当地协调,区域,和国家医生。许多具有丰富经验的医生在协调这些跨学科指南的实施方面处于独特的位置。按计划使用这些指南,协调行动,不要害怕,是一条前进的道路。各国必须做出决定:封闭与开放。
    Background and Objectives: Action, not fear, is the path forward in the coronavirus infectious disease 2019 (COVID-19) pandemic. Since early 2020, the world\'s nations have faced conundrums over severe acute respiratory syndrome corona virus type 2 (SARS-CoV-2) infections resulting in COVID-19 resulting in national closures, and thus, a clear understandable plan that nations can implement is required to reopen. The healthcare benefits of reopening a nation more likely than not exceed the benefits of continued pandemic-related closure. Pandemic-related closures have resulted in countless delayed or avoided urgent care evaluations. Furthermore, routine care of acute and chronic illnesses, including evaluations, diagnoses, and treatments, has also been delayed. Isolation, loss of income, and fear have resulted in mental health conditions or exacerbated existing conditions. The magnitude of untoward ramifications is unknown and may ultimately represent an inestimable degree of danger and morbidity, and even death. The pandemic of SARS-CoV-2 has created an atmosphere of fear of COVID-19 that has directly and indirectly injured the world\'s population. Since this has resulted in increasing morbidity and mortality, creating economic chaos, and near systemic collapse of educational systems with no well described plan forward, it is the purpose of this study to provide guidelines that provide a path forward to safely open a nation. Physicians often equipped by their education, training, and experiences across disciplines are uniquely positioned to comprehend, coordinate, and teach other physicians, business owners, and municipal and government leaders from guidelines. As such, physicians may take the lead in a path forward to reopening a nation, including opening businesses, educational facilities, and religious establishments, while minimizing the risk of SARS-CoV-2 infection. Materials and Methods: Reviews of the literature among the disciplines of environmental air, sanitation, social interaction, medical testing, vaccination, protection, and disease prevention and safety allowed for the conceptualization and eventual genesis of identifiable interventions which either reduce the viral load in the environment or inactivate the virus from replication. Each of the guidelines was selected based on the principle that it involved the elimination or inactivation of the viral particle. With a reduction in viral load or inactivation of replication, the implementation of these guidelines is expected to allow for reopening a nation with an increased level of safety. Results: The guidelines identified, including air exchange (ventilation), air filtration, personal protective filtering devices (masks), hand hygiene, social distancing, screening and testing, vaccines, high-risk patient protection, medical management, and adjunctive therapies, are described and referenced. Conclusions: In that the pandemic is primarily a public health issue, the path forward is best coordinated by local, regional, and national physicians. Many physicians with a breadth of experiences are uniquely positioned to coordinate the implementation of these interdisciplinary guidelines. Using these guidelines as a planned, coordinated action, not fear, is a path forward. Nations have a decision to make: closuring versus opening.
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  • 文章类型: Journal Article
    背景:我们试图了解重度酒精和频繁吸毒与不遵守推荐的社会距离和个人卫生指南之间的关系,以防止COVID-19在美国大流行早期传播。方法:在众包平台上进行调查,2020年4月的亚马逊机械土耳其人(MTurk)(严格的早期,社会距离限制)。该研究包括1,521名年龄在18岁及以上的成年人,他们居住在美国,并被注册为MTurk工人。即,亚马逊有资格完成一系列人际交往任务的工人,包括通过MTurk工人平台进行的调查。主要预测指标包括大量饮酒的指标,大麻,和多物质的使用。依赖的措施是社会距离和个人卫生的措施,根据美国疾病控制中心调查时建议的预防COVID-19传播的指南。结果:我们发现大量饮酒和吸毒与坚持社交距离和个人卫生之间存在一致的负相关关系。此外,三个控制变量,年龄,性别,和种族/民族,与遵守这些措施有显著的相关性。结论:此处的发现与先前探索物质使用与其他不良健康行为之间联系的研究一致。Further,大量饮酒(一次饮酒五杯或更多)与依从性之间的负相关性强调了公共饮酒场所不受限制地重新开放所带来的公共卫生风险。
    Background: We sought to understand the association between heavy alcohol and frequent drug use and non-adherence to recommended social distancing and personal hygiene guidelines for preventing the spread of COVID-19 early in the US pandemic. Methods: A survey was offered on the crowdsourcing platform, Amazon Mechanical Turk (MTurk) during April 2020 (the early days of strict, social distancing restrictions). The study included 1,521 adults ages 18 years and older who resided in the US and were enrolled as MTurk workers, i.e., workers who are qualified by Amazon to complete a range of human interaction tasks, including surveys through the MTurk worker platform. Main predictors included measures of heavy drinking, marijuana, and polysubstance use. The dependent measures were measures of social distancing and personal hygiene, based on guidelines recommended at the time of the survey by the US Centers for Disease Control to prevent the spread of COVID-19. Results: We found consistent negative associations between heavy drinking and drug use and adherence to social distancing and personal hygiene. Additionally, three control variables, age, gender, and race/ethnicity, were significant correlates of adherence to these measures. Conclusions: The findings here are consistent with previous research exploring links between substance use and other adverse health behaviors. Further, the negative association between heavy drinking (five or more drinks in one sitting) and adherence underscore the public health risks entailed with the unrestricted reopening of public drinking establishments.
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  • 文章类型: Journal Article
    作为一种非药物干预形式的社会距离已经在许多国家颁布,作为减轻COVID-19传播的一种形式。人们对数学建模产生了极大的兴趣,以帮助预测总感染人口和与病毒有关的死亡人数。以及帮助政府机构做出决策。随着病毒继续传播,有经济和社会方面的激励措施,以尽量减少在执行严格的距离任务时花费的时间,和/或采用定期放松的距离协议,这允许有计划的经济活动。本研究的主要目的是降低人群的疾病负担,这里衡量的是感染人口的峰值,同时最大限度地减少人口与社会距离的时间,利用单一时期的社会距离以及周期性的放松。我们从经典的流行病SIR模型的近似值中得出了单个社会距离间隔的最佳开始时间和持续时间之间的线性关系。此外,我们在开始时间看到一个尖锐的相变区域,感染人口的高峰迅速变化;特别是,这种转变发生在人们直觉预期之前。通过对专门描述COVID-19大流行的更复杂的流行病学模型进行数值调查,我们看到,当接触率受到周期性或一次性变化时,所有这些都具有非常相似的动态特征,因此,我们得出结论,这些特征在流行病模型中是普遍的。另一方面,传染病模型的非线性导致在周期性放松社会距离政策下,感染人口高峰的非单调行为。这一观察结果使我们假设,在适当的时间额外的单间隔社交距离可以显着降低周期性政策的感染高峰,我们通过数值验证了这种改进。虽然跨人群的同步隔离和社会距离授权有效地将流行病在世界范围内的传播降至最低,对于不同的人群,不应同时制定放松决定。
    Social distancing as a form of nonpharmaceutical intervention has been enacted in many countries as a form of mitigating the spread of COVID-19. There has been a large interest in mathematical modeling to aid in the prediction of both the total infected population and virus-related deaths, as well as to aid government agencies in decision making. As the virus continues to spread, there are both economic and sociological incentives to minimize time spent with strict distancing mandates enforced, and/or to adopt periodically relaxed distancing protocols, which allow for scheduled economic activity. The main objective of this study is to reduce the disease burden in a population, here measured as the peak of the infected population, while simultaneously minimizing the length of time the population is socially distanced, utilizing both a single period of social distancing as well as periodic relaxation. We derive a linear relationship among the optimal start time and duration of a single interval of social distancing from an approximation of the classic epidemic SIR model. Furthermore, we see a sharp phase transition region in start times for a single pulse of distancing, where the peak of the infected population changes rapidly; notably, this transition occurs well before one would intuitively expect. By numerical investigation of more sophisticated epidemiological models designed specifically to describe the COVID-19 pandemic, we see that all share remarkably similar dynamic characteristics when contact rates are subject to periodic or one-shot changes, and hence lead us to conclude that these features are universal in epidemic models. On the other hand, the nonlinearity of epidemic models leads to non-monotone behavior of the peak of infected population under periodic relaxation of social distancing policies. This observation led us to hypothesize that an additional single interval social distancing at a proper time can significantly decrease the infected peak of periodic policies, and we verified this improvement numerically. While synchronous quarantine and social distancing mandates across populations effectively minimize the spread of an epidemic over the world, relaxation decisions should not be enacted at the same time for different populations.
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