Bayesian analysis

贝叶斯分析
  • 文章类型: Journal Article
    背景:巴西是剖腹产率最高的国家之一,达到私营部门近90%的新生儿。设想了一个名为“适当分娩项目(PPA)”的质量改进项目,以减少私营部门的CS。该项目由四个主要组成部分组成:“治理”,“妇女参与”,“护理重组”和“监控”。本文旨在评估:(1)PPA的哪种特定活动对女性阴道分娩的可能性影响最大;(2)PPA的哪种主要成分对阴道分娩的可能性影响最大;(3)结合PPA计划中实施不同活动的情景对阴道分娩的可能性影响更大。
    方法:对参加PPA的12家私立医院的样本进行了评估。我们使用贝叶斯网络(BN)来捕获非线性和复杂的因果关系。BN综合了专家的知识和妇女的数据,估计了26个模型参数。在罗布森分类第1-4组的2473名妇女中评估了PPA,他们分为两组:参加或不参加PPA的人。
    结果:参与PPA的女性阴道分娩的可能性高出37.7%。导致阴道分娩概率增加的项目最重要的组成部分是“护理重组”,导致产妇阴道分娩的可能性为73%。对分娩类型影响最大的活动是在分娩期间获得最佳实践,阴道分娩的概率为72%.考虑到结合PPA不同活动的12种情况,最好的方案包括:非计划交付,访问有关最佳实践的信息,在分娩期间获得至少4种最佳做法,并尊重生育计划,在最佳组合中阴道分娩的概率为80%。
    结论:PPA已被证明是一种有效的质量改进计划,增加了巴西私立医院阴道分娩的可能性。
    背景:巴西是全球剖腹产率最高的国家之一,在私人设施中,近90%的分娩是通过CS分娩的。作为回应,“适当分娩项目-PPA”是一项质量改进计划,旨在遏制私人医疗保健中的CS率。其目标是提高分娩质量并减少私人医疗保健中的CS数量。该项目有四个主要部分:\'治理\',“妇女参与”,\'护理重组\',和\'监控\'。
    方法:在参与PPA的12家私立医院中进行了一项评估研究,涉及2473名被分为PPA参与者和非参与者的女性。他们使用一种称为因果网络的方法来查看PPA的哪些部分帮助更多的女性进行阴道分娩。
    结果:他们发现接受PPA的女性阴道分娩的可能性要高出37.7%。让妇女在分娩和分娩期间获得良好做法非常重要。此外,“护理重组”是该项目的最重要的部分。这导致分娩妇女阴道分娩的可能性为73%。
    结论:PPA可有效帮助私立医院的更多妇女进行阴道分娩。这意味着它是改善巴西私立医院分娩的好方案。
    BACKGROUND: Brazil is one of the countries with the highest rates of caesarean sections (CS), reaching almost 90% of births in the private sector. A quality improvement project called \"Adequate Childbirth Project (PPA)\" was conceived to reduce CS in the private sector. This project consisted of four primary components: \"Governance\", \"Participation of Women\", \"Reorganization of Care\" and \"Monitoring\". This paper aims to evaluate: (1) which specific activities of the PPA had the largest effect on the probability of a woman having a vaginal delivery; (2) which primary component of the PPA had the largest effect on the probability of vaginal delivery and (3) which scenarios combining the implementation of different activities planned in the PPA had a higher effect on the probability of vaginal delivery.
    METHODS: A sample of 12 private hospitals participating in the PPA was evaluated. We used a Bayesian Network (BN) to capture both non-linearities and complex cause-effect relations. The BN integrated knowledge from experts and data from women to estimate 26 model parameters. The PPA was evaluated in 2473 women belonging to groups 1-4 of the Robson classification, who were divided into two groups: those participating or not participating in the PPA.
    RESULTS: The probability of a woman having a vaginal delivery was 37.7% higher in women participating in the PPA. The most important component of the project that led to an increase in the probability of vaginal delivery was \"Reorganization of Care\", leading to a 73% probability of vaginal delivery among women in labor. The activity that had the greatest effect on the type of delivery was access to best practices during labor, with a 72% probability of vaginal delivery. Considering the 12 scenarios combining the different activities of the PPA, the best scenarios included: a non-scheduled delivery, access to information about best practices, access to at least 4 best practices during labor and respect of the birth plan, with an 80% probability of vaginal delivery in the best combinations.
    CONCLUSIONS: PPA has been shown to be an effective quality improvement program, increasing the likelihood of vaginal delivery in private Brazilian hospitals.
    BACKGROUND: Brazil boasts one of the highest rates of caesarean sections (CS) globally, with nearly 90% of births in private facilities being delivered via CS. In response, the \'Adequate Childbirth Project – PPA\' was launched as a quality improvement initiative aimed at curbing CS rates in private healthcare. Its goal is to improve the quality of childbirth and reduce the number of CS in private healthcare. The project has four main parts: \'Governance\', \'Participation of Women\', \'Reorganization of Care\', and \'Monitoring\'.
    METHODS: an evaluative study was conducted across 12 private hospitals involved in the PPA, involving 2473 women who were categorized into PPA participants and non-participants. They used a method called a cause-effect network to see which parts of the PPA helped more women have vaginal deliveries.
    RESULTS: They found that women in the PPA were 37.7% more likely to have a vaginal delivery. Giving women access to good practices during labor and birth was really important. Also, \'Reorganization of Care\' was the most important part of the project. It led to a 73% chance of vaginal delivery for women in labor.
    CONCLUSIONS: The PPA is effective in helping more women in private hospitals have vaginal deliveries. This means it\'s a good program for improving childbirth in Brazil\'s private hospitals.
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  • 文章类型: Journal Article
    欧洲蝙蝠溶血病毒1(EBLV-1,汉堡Lyssavirus)主要在血清学蝙蝠(Eptesicusserotinus)中检测到,并且是欧洲大陆大多数蝙蝠狂犬病病例的原因。2018年10月,一项被动的蝙蝠狂犬病监测计划首次在英国的血清型蝙蝠中检测到该病毒。截至2024年5月,已报告34例,其中20例涉及与动物接触,5例报告与人接触。我们通过进行全面的序列分析和贝叶斯系统发育研究了EBLV-1的出现,基于涵盖欧洲大陆六个国家(1968-2023年)的33个英国序列和108个序列的完整病毒基因组,包括21个法国EBLV-1阳性RNA样品测序。序列分析显示UKEBLV-1序列之间具有极大的相似性(99.9%-100%),暗示单一的介绍来源,而不是多个独立的介绍。贝叶斯分析显示,英国EBLV-1序列与布列塔尼检测到的血清型蝙蝠的EBLV-1序列共享其最新的共同祖先,法国,2001年,估计偏离日期为1997年。在英国序列中,最早的分歧估计发生在2007年。这项研究为新兴的人畜共患病原体的分子流行病学提供了有价值的见解,并增进了对公众和动物健康风险的理解。
    European bat lyssavirus 1 (EBLV-1, Lyssavirus hamburg) is predominantly detected in serotine bats (Eptesicus serotinus) and is responsible for the majority of bat rabies cases in mainland Europe. A passive bat rabies surveillance scheme detected the virus in a serotine bat in the UK for the first time in October 2018. As of May 2024, 34 cases have been reported, 20 of which involved contact with an animal and 5 reported human contact. We investigated the emergence of EBLV-1 by undertaking comprehensive sequence analysis and Bayesian phylogenetics, based on complete virus genomes of 33 UK sequences and 108 sequences covering six countries in mainland Europe (1968-2023), including 21 French EBLV-1-positive RNA samples sequenced for this study. Sequence analysis revealed extreme similarity among UK EBLV-1 sequences (99.9%-100%), implying a single source of introduction rather than multiple independent introductions. Bayesian analysis revealed that the UK EBLV-1 sequences shared their most recent common ancestor with an EBLV-1 sequence from a serotine bat detected in Brittany, France, in 2001, with an estimated date of divergence of 1997. Within the UK sequences, the earliest divergence was estimated to occur in 2007. This study provides valuable insights into the molecular epidemiology of an emerging zoonotic pathogen and improved understanding of the risks posed to public and animal health.
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  • 文章类型: Journal Article
    致癌物的识别和分类在癌症流行病学中至关重要,需要更新的方法来管理新兴的生物医学文献。当前系统,像那些由国际癌症研究机构(IARC)和国家毒理学计划(NTP)运行,面临挑战,由于人工审查和致癌物分类的差异刺激的大量新出现的数据。为了解决这些问题,我们介绍了通过变压器检测致癌物(CarD-T)框架,一种文本分析方法,将基于变压器的机器学习与概率统计分析相结合,以有效地从科学文本中提名致癌物。CarD-T使用在PubMed摘要上训练的命名实体识别(NER),以IARC组的已知致癌物为特征,并包括上下文分类器以提高准确性和管理计算需求。使用此方法,分析了过去25年以致癌性和致癌性为索引的期刊出版物数据,确定潜在的致癌物。对60%已确定的致癌物(第1组和第2A组致癌物,IARC指定),CarD-T正确地从分析的文本中识别所有剩余的第1组和第2A组指定的致癌物。此外,CarD-T提名了大约1500多个实体作为潜在致癌物,这些实体至少有两个出版物引用了致癌性的证据。CarD-T与GPT-4模型的比较评估显示出较高的召回率(0.857vs0.705)和F1评分(0.875vs0.792),和可比的精度(0.894对0.903)。此外,CarD-T重点介绍了554个存在致癌性证据的实体。使用贝叶斯时间概率致癌分类(PCarD)对这些进行进一步分析,以根据不断发展的证据对其致癌状态进行概率评估。我们的发现强调,CarD-T框架不仅在大量生物医学文献中识别和提名潜在致癌物方面是强大而有效的,而且在消费者GPU上也是有效的。这种先进的NLP功能与重要的流行病学分析的整合显着增强了对致癌物识别的公共卫生反应的敏捷性。从而为自动化设置新的基准,可扩展的毒理学研究。
    The identification and classification of carcinogens is critical in cancer epidemiology, necessitating updated methodologies to manage the burgeoning biomedical literature. Current systems, like those run by the International Agency for Research on Cancer (IARC) and the National Toxicology Program (NTP), face challenges due to manual vetting and disparities in carcinogen classification spurred by the volume of emerging data. To address these issues, we introduced the Carcinogen Detection via Transformers (CarD-T) framework, a text analytics approach that combines transformer-based machine learning with probabilistic statistical analysis to efficiently nominate carcinogens from scientific texts. CarD-T uses Named Entity Recognition (NER) trained on PubMed abstracts featuring known carcinogens from IARC groups and includes a context classifier to enhance accuracy and manage computational demands. Using this method, journal publication data indexed with carcinogenicity & carcinogenesis Medical Subject Headings (MeSH) terms from the last 25 years was analyzed, identifying potential carcinogens. Training CarD-T on 60% of established carcinogens (Group 1 and 2A carcinogens, IARC designation), CarD-T correctly to identifies all of the remaining Group 1 and 2A designated carcinogens from the analyzed text. In addition, CarD-T nominates roughly 1500 more entities as potential carcinogens that have at least two publications citing evidence of carcinogenicity. Comparative assessment of CarD-T against GPT-4 model reveals a high recall (0.857 vs 0.705) and F1 score (0.875 vs 0.792), and comparable precision (0.894 vs 0.903). Additionally, CarD-T highlights 554 entities that show disputing evidence for carcinogenicity. These are further analyzed using Bayesian temporal Probabilistic Carcinogenic Denomination (PCarD) to provide probabilistic evaluations of their carcinogenic status based on evolving evidence. Our findings underscore that the CarD-T framework is not only robust and effective in identifying and nominating potential carcinogens within vast biomedical literature but also efficient on consumer GPUs. This integration of advanced NLP capabilities with vital epidemiological analysis significantly enhances the agility of public health responses to carcinogen identification, thereby setting a new benchmark for automated, scalable toxicological investigations.
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  • 文章类型: Journal Article
    饮食行为受味觉整合的影响,嗅觉,和体感信号,这些都有助于感知味道。尽管广泛的研究已经探索了味觉皮层(GC)中味觉的神经相关性,人们对其在热信息编码中的作用知之甚少。本研究调查了与口腔体感皮层相比,GC神经元对口腔热和化学感觉信号的编码。在这项研究中,我们记录了小鼠口腔体感皮层900多个GC神经元和500个神经元的尖峰活动,这些神经元可以在不同的非伤害性温度下自由舔小滴味觉刺激或去离子水。然后,我们开发并使用了一种基于贝叶斯的分析技术,以根据舔周期内的刺速和相位时间来评估神经分类分数。我们的结果表明,GC神经元主要依赖于速率信息,尽管需要相位信息来实现最大精度,有效地编码化感和热感信号。GC神经元能有效区分热刺激,擅长区分两个大的对比(14°与36°C)和,虽然效果较差,更微妙的温度差异。最后,直接比较两个皮层之间的热感信号的解码精度表明,虽然体感皮层显示出更高的整体精度,GC仍然编码重要的热感信息。这些发现突出了GC在加工味道和温度方面的双重作用,强调在未来的口味加工研究中考虑温度的重要性。
    Eating behaviors are influenced by the integration of gustatory, olfactory, and somatosensory signals, which all contribute to the perception of flavor. Although extensive research has explored the neural correlates of taste in the gustatory cortex (GC), less is known about its role in encoding thermal information. This study investigates the encoding of oral thermal and chemosensory signals by GC neurons compared to the oral somatosensory cortex. In this study, we recorded the spiking activity of more than 900 GC neurons and 500 neurons from the oral somatosensory cortex in mice allowed to freely lick small drops of gustatory stimuli or deionized water at varying non-nociceptive temperatures. We then developed and used a Bayesian-based analysis technique to assess neural classification scores based on spike rate and phase timing within the lick cycle. Our results indicate that GC neurons rely predominantly on rate information, although phase information is needed to achieve maximum accuracy, to effectively encode both chemosensory and thermosensory signals. GC neurons can effectively differentiate between thermal stimuli, excelling in distinguishing both large contrasts (14°C vs. 36°C) and, although less effectively, more subtle temperature differences. Finally, a direct comparison of the decoding accuracy of thermosensory signals between the two cortices reveals that while the somatosensory cortex showed higher overall accuracy, the GC still encodes significant thermosensory information. These findings highlight the GC\'s dual role in processing taste and temperature, emphasizing the importance of considering temperature in future studies of taste processing.
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  • 文章类型: Journal Article
    背景:2型糖尿病(T2DM)的疾病管理计划(DMP)是德国最大的DMP。我们的目标是分析未入学率的地区差异,建议干预领域并提供背景信息,目前未在T2DMDMP中登记的地区的人群群体。
    方法:在本研究中,我们使用了1.7mil的数据。AOKNordost健康保险的被保险人。为了可视化注册潜力,我们使用了Besag-York-Mollie模型(BYM)。空间扫描统计(SaTScan)用于检测未登记糖尿病患者异常高率的区域,以确定干预区域的优先级。为了探索社会人口统计学关联,我们使用贝叶斯空间全局回归模型。空间变化系数模型(SVC)揭示了检测到的关联在空间上变化的程度。
    结果:2019年,目前未参加DMPT2DM的糖尿病患者比例为36.8%,在德国东北部有所不同。主要在梅克伦堡-西波美拉尼亚和柏林发现了局部集群。与未入学相关的主要社会人口统计学变量是女性,年龄较小,失业,外国国籍,小家庭规模和通勤到居住城市以外工作的人口比例。SVC模型揭示了一些但不是所有关联的重要空间变化效应。
    结论:较低的社会经济地位和外国公民身份对不入学有普遍的影响。因此,DMPT2DM目前无法到达这些人群,这些疾病有较高的继发疾病风险和可能的可避免的住院治疗。逻辑上,未来的干预措施应侧重于这些群体.我们的方法清楚地提出了干预的领域,并指出,应该特别接触哪个人口群体的地点。
    BACKGROUND: The disease management program (DMP) for type 2 Diabetes Mellitus (T2DM) is the largest DMP in Germany. Our goal was to analyze regional differences in unenrollment rates, suggest areas for intervention and provide background information, which population groups in which locations are currently not enrolled in the DMP for T2DM.
    METHODS: In this study, we used data of the 1.7 mil. insurants of the AOK Nordost health insurance. For the visualization of enrollment potential, we used the Besag-York-Mollie model (BYM). The spatial scan statistic (SaTScan) was used to detect areas of unusually high rates of unenrolled diabetics to prioritize areas for intervention. To explore sociodemographic associations, we used Bayesian spatial global regression models. A Spatially varying coefficient model (SVC) revealed in how far the detected associations vary over space.
    RESULTS: The proportion of diabetics currently not enrolled in the DMP T2DM was 36.8% in 2019 and varied within northeastern Germany. Local clusters were detected mainly in Mecklenburg-West-Pomerania and Berlin. The main sociodemographic variables associated with unenrollment were female sex, younger age, being unemployed, foreign citizenship, small household size and the proportion of persons commuting to work outside their residential municipality. The SVC model revealed important spatially varying effects for some but not all associations.
    CONCLUSIONS: Lower socioeconomic status and foreign citizenship had an ubiquitous effect on not being enrolled. The DMP T2DM therefore does currently not reach those population groups, which have a higher risk for secondary diseases and possible avoidable hospitalizations. Logically, future interventions should focus on these groups. Our methodology clearly suggests areas for intervention and points out, which population group in which locations should be specifically approached.
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  • 文章类型: Journal Article
    心理资本(Psycap)是一种积极的个人资源,可以提高大学生的幸福感和学习成绩。最初在组织领域讨论,最近在学术领域讨论。本研究旨在根据秘鲁大学生的性别和年龄确定PsyCap的差异。一个定量的,比较,非实验性的,并对708名学生(77.4%为女性,22.6%为男性)进行了横断面研究,年龄在18至61岁之间(M=22.1;SD=5.95),以非概率方式选择,完成了心理资本问卷(PCQ-12)。结果表明,非常有力的证据支持不同年龄组之间存在显着差异,这表明观察到的变化不是偶然的,而是反映了年龄之间的真正差异。关于性别,这些数据没有提供足够的信息来自信地断言男性和女性在心理资本(PsyCap)及其维度方面是否存在显著差异.这意味着我们无法确认性别是否会影响这些变量。这些发现强调了在评估和干预大学生PsyCap时需要考虑年龄。
    Psychological capital (PsyCap) constitutes a positive personal resource that enhances better well-being and academic performance in university students. Initially addressed in the organizational realm and recently in the academic one. This study aimed to establish the differences in PsyCap according to gender and age in Peruvian university students. A quantitative, comparative, non-experimental, and cross-sectional study was conducted with 708 students (77.4 % women and 22.6 % men), aged between 18 and 61 years (M = 22.1; SD = 5.95), selected in a non-probabilistic manner, who completed the Psychological Capital Questionnaire (PCQ-12). The results indicate very strong evidence supporting the existence of significant differences between different age groups, suggesting that the observed variations are not due to chance but reflect real differences between ages. Regarding gender, the data do not provide enough information to confidently assert whether there are significant differences between men and women in relation to psychological capital (PsyCap) and its dimensions. This implies that we cannot confirm whether gender influences these variables. These findings highlight the need to consider age when assessing and intervening in PsyCap in university students.
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  • 文章类型: Journal Article
    尽管人们对基于精准医学的阿尔茨海默病(AD)疗法越来越感兴趣,关于个体AD危险因素如何影响经颅直流电刺激(tDCS)后认知功能变化的研究很少。这项研究评估了序贯tDCS对63例轻度认知障碍(MCI)患者的认知效果。考虑到AD的危险因素,如β淀粉样蛋白沉积,APOEε4,BDNF多态性,和性爱。使用频率论和贝叶斯方法,我们评估了tDCS与这些危险因素对认知表现的交互作用.值得注意的是,我们发现β淀粉样蛋白沉积在改善执行功能方面与tDCS显著相互作用,特别是StroopWord-Color分数,对这一发现有强烈的贝叶斯支持。记忆增强受BDNFMet携带者状态的不同影响。然而,性别和APOEε4状态没有显着影响。我们的结果强调了个体AD危险因素在调节tDCS认知结果中的重要性,这表明精准医学可以提供更有效的tDCS治疗,适合AD早期个体的风险状况.
    Despite the growing interest in precision medicine-based therapies for Alzheimer\'s disease (AD), little research has been conducted on how individual AD risk factors influence changes in cognitive function following transcranial direct current stimulation (tDCS). This study evaluates the cognitive effects of sequential tDCS on 63 mild cognitive impairment (MCI) patients, considering AD risk factors such as amyloid-beta deposition, APOE ε4, BDNF polymorphism, and sex. Using both frequentist and Bayesian methods, we assessed the interaction of tDCS with these risk factors on cognitive performance. Notably, we found that amyloid-beta deposition significantly interacted with tDCS in improving executive function, specifically Stroop Word-Color scores, with strong Bayesian support for this finding. Memory enhancements were differentially influenced by BDNF Met carrier status. However, sex and APOE ε4 status did not show significant effects. Our results highlight the importance of individual AD risk factors in modulating cognitive outcomes from tDCS, suggesting that precision medicine may offer more effective tDCS treatments tailored to individual risk profiles in early AD stages.
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  • 文章类型: Journal Article
    尽管在理解风险因素和治疗策略方面取得了重大进展,缺血性心脏病(IHD)仍然是全球死亡的主要原因,特别是在巴西的特定地区,疾病是一种负担。因此,这项研究的目的是估计巴拉那州(巴西)的IHD住院和死亡的风险,使用空间分析来识别基于社会经济的高风险区域,人口统计学和健康变量。
    这是一项基于2010-2021年期间从巴西住院和死亡率信息系统获得的继发性和回顾性IHD住院和死亡率数据的生态学研究。对巴拉那州399个城市和22个卫生地区的数据进行了分析。为了评估疾病的空间模式并确定相对风险(RR)区域,我们使用R软件中的R-INLA和SpatialEpi软件包通过贝叶斯推断构建了风险模型。
    在分析期间,共有333,229例住院和73,221例死亡。IHD的住院RR(RR=27.412,CI21.801;34.466)和死亡率(RR=15.673,CI2.148;114.319)升高发生在小型城市。此外,中等规模的城市也出现了IHD导致的住院RR(RR=6.533,CI1.748;2.006)和死亡率(RR=6.092,CI1.451;2.163)升高.40-59岁白人男性的住院率和死亡率较高。市政绩效指数(IPDM)与IHD住院率和死亡率之间呈负相关。
    在巴拉那州的中小型城市中发现了IHD住院和死亡风险增加的地区,巴西。这些结果表明,这些地区对IHD病例的医疗保健关注不足,可能是由于卫生保健资源的低分布。
    UNASSIGNED: Despite significant advancements in understanding risk factors and treatment strategies, ischemic heart disease (IHD) remains the leading cause of mortality worldwide, particularly within specific regions in Brazil, where the disease is a burden. Therefore, the aim of this study was to estimate the risk of hospitalization and mortality from IHD in the state of Paraná (Brazil), using spatial analysis to identify areas with higher risk based on socioeconomic, demographic and health variables.
    UNASSIGNED: This is an ecological study based on secondary and retrospective IHD hospitalization and mortality data obtained from the Brazilian Hospitalization and Mortality Information Systems during the 2010-2021 period. Data were analyzed for 399 municipalities and 22 health regions in the state of Paraná. To assess the spatial patterns of the disease and identify relative risk (RR) areas, we constructed a risk model by Bayesian inference using the R-INLA and SpatialEpi packages in R software.
    UNASSIGNED: A total of 333,229 hospitalizations and 73,221 deaths occurred in the analyzed period, and elevated RR of hospitalization (RR = 27.412, CI 21.801; 34.466) and mortality (RR = 15.673, CI 2.148; 114.319) from IHD occurred in small-sized municipalities. In addition, medium-sized municipalities also presented elevated RR of hospitalization (RR = 6.533, CI 1.748; 2.006) and mortality (RR = 6.092, CI 1.451; 2.163) from IHD. Hospitalization and mortality rates were higher in white men aged 40-59 years. A negative association was found between Municipal Performance Index (IPDM) and IHD hospitalization and mortality.
    UNASSIGNED: Areas with increased risk of hospitalization and mortality from IHD were found in small and medium-sized municipalities in the state of Paraná, Brazil. These results suggest a deficit in health care attention for IHD cases in these areas, potentially due to a low distribution of health care resources.
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  • 文章类型: Journal Article
    背景:虚弱是一种多因素综合征;通过这项研究,我们的目的是调查生理,心理,以及与社区居住老年人的虚弱和虚弱恶化相关的社会因素。
    方法:我们使用来自“社区授权与福祉和健康长期护理:来自队列研究(CEC)的证据”的数据进行了横向和纵向研究。“重点是日本65岁及以上的社区居民。横断面研究的样本来自2014年进行的CEC研究,共有673名参与者。在排除基线评估(2014年)和3年随访(2017年)期间体弱者后,该研究包括373名参与者.脆弱评估是从Kihon清单中提取的,而社会关系使用社会互动指数(ISI)进行评估。使用最小绝对收缩和选择算子(LASSO)回归进行变量选择,并测试其预测能力。通过应用于贝叶斯网络(BNs)的最大最小爬升算法确定了与虚弱状态和恶化相关的因素。
    结果:在基线时,14.1%(673人中有95人)的参与者身体虚弱,24.1%(373人中有90人)的参与者在3年随访时出现虚弱恶化.LASSO回归确定了脆弱的关键变量。对于脆弱识别(横截面),LASSO模型的AUC为0.943(95CI0.913-0.974),表明良好的歧视,Hosmer-Lemeshow(H-L)检验p=0.395。对于虚弱恶化(纵向),LASSO模型的AUC为0.722(95CI0.656-0.788),表明适度的歧视,H-L检验p=0.26。BN发现年龄,多浊度,功能状态,社会关系是与脆弱直接相关的父节点。它揭示了75岁或以上有身体功能障碍的人有85%的虚弱概率,多药,和低ISI分数;然而,如果他们的社会关系和多重用药状况得到改善,概率降低到50.0%。在纵向水平脆弱恶化模型中,75岁或以上的人的身体素质和ISI评分下降,其身体虚弱恶化的概率为75%;然而,如果身体功能和ISI改善,概率下降到25.0%。
    结论:脆弱及其进展在社区居住的老年人中普遍存在,并受各种因素的影响,包括年龄,物理功能,和社会关系。神经网络有助于识别这些变量之间的相互关系,量化关键因素的影响。然而,需要进一步的研究来验证所提出的模型。
    BACKGROUND: Frailty is a multifactorial syndrome; through this study, we aimed to investigate the physiological, psychological, and social factors associated with frailty and frailty worsening in community-dwelling older adults.
    METHODS: We conducted a cross-sectional and longitudinal study using data from the \"Community Empowerment and Well-Being and Healthy Long-term Care: Evidence from a Cohort Study (CEC),\" which focuses on community dwellers aged 65 and above in Japan. The sample of the cross-sectional study was drawn from a CEC study conducted in 2014 with a total of 673 participants. After excluding those who were frail during the baseline assessment (2014) and at the 3-year follow-up (2017), the study included 373 participants. Frailty assessment was extracted from the Kihon Checklist, while social relationships were assessed using the Social Interaction Index (ISI). Variable selection was performed using Least Absolute Shrinkage and Selection Operator (LASSO) regression and their predictive abilities were tested. Factors associated with frailty status and worsening were identified through the Maximum-min Hillclimb algorithm applied to Bayesian networks (BNs).
    RESULTS: At baseline, 14.1% (95 out of 673) participants were frail, and 24.1% (90 out of 373) participants experienced frailty worsening at the 3-years follow up. LASSO regression identified key variables for frailty. For frailty identification (cross-sectional), the LASSO model\'s AUC was 0.943 (95%CI 0.913-0.974), indicating good discrimination, with Hosmer-Lemeshow (H-L) test p = 0.395. For frailty worsening (longitudinal), the LASSO model\'s AUC was 0.722 (95%CI 0.656-0.788), indicating moderate discrimination, with H-L test p = 0.26. The BNs found that age, multimorbidity, function status, and social relationships were parent nodes directly related to frailty. It revealed an 85% probability of frailty in individuals aged 75 or older with physical dysfunction, polypharmacy, and low ISI scores; however, if their social relationships and polypharmacy status improve, the probability reduces to 50.0%. In the longitudinal-level frailty worsening model, a 75% probability of frailty worsening in individuals aged 75 or older with declined physical function and ISI scores was noted; however, if physical function and ISI improve, the probability decreases to 25.0%.
    CONCLUSIONS: Frailty and its progression are prevalent among community-dwelling older adults and are influenced by various factors, including age, physical function, and social relationships. BNs facilitate the identification of interrelationships among these variables, quantify the influence of key factors. However, further research is required to validate the proposed model.
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  • 文章类型: Journal Article
    甜栗子(栗子。)受到其传统栗树林逐渐消失的影响。在意大利北部,甜栗子的分布是分散的,许多本地品种仍然主要通过口头传统来识别。我们以SSR为特征,在科莫湖周边地区有11种历史公认的甜栗子品种,目的是为传统分类提供遗传基础。我们进行了关于分化的经典分析,并使用贝叶斯方法来检测人口结构并重建人口统计学。结果表明,当栗子果实只是“castagne”时,历史和遗传分类是松散联系的,也就是说,正常水果,但与“marroni”(最珍贵的水果)有关的重叠越来越多。贝叶斯分类使我们能够识别出传统品种评估中未识别的同质基因簇,并重建了用于甜栗子繁殖的可能途径。我们还重建了所涉及的不同基因库和过时的祖先谱系之间的祖先关系,其结果与孢粉学数据相符。我们建议,基于对资源的遗传评估的保护策略也应依靠传统文化遗产,可以揭示新的种质来源。
    The sweet chestnut (Castanea sativa Mill.) is subject to the progressive disappearance of its traditional chestnut groves. In the northern part of Italy, where distribution of the sweet chestnut is fragmented, many local varieties continue to be identified mostly by oral tradition. We characterised by SSRs eleven historically recognised varieties of sweet chestnut in the area surrounding Lake Como, with the goal of giving a genetic basis to the traditional classification. We performed classical analysis about differentiation and used Bayesian approaches to detect population structure and to reconstruct demography. The results revealed that historical and genetic classifications are loosely linked when chestnut fruits are just \"castagne\", that is, normal fruits, but increasingly overlap where \"marroni\" (the most prized fruits) are concerned. Bayesian classification allowed us to identify a homogeneous gene cluster not recognised in the traditional assessment of the varieties and to reconstruct possible routes used for the propagation of sweet chestnut. We also reconstructed ancestral relationships between the different gene pools involved and dated ancestral lineages whose results fit with palynological data. We suggest that conservation strategies based on a genetic evaluation of the resource should also rely on traditional cultural heritage, which could reveal new sources of germplasm.
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