descriptive analysis

描述性分析
  • 文章类型: Journal Article
    背景:与医疗器械相关的不良事件(AE)的报告是一个长期关注的领域,由于一系列因素,包括未能认识到不良事件与医疗设备的关联,报告效果欠佳,缺乏如何报告AE的知识,和一般的不报告文化。人工智能作为医疗设备(AIaMD)的引入需要一个强大的安全监控环境,该环境既可以识别医疗设备的一般风险,也可以识别AIaMD的一些日益被认可的风险(例如算法偏差)。迫切需要了解当前AE报告系统的局限性,并探索如何检测AE的潜在机制。归因,并报告以改善安全信号的早期检测。
    目的:本方案中概述的系统评价旨在利用现有的监管指导来描述事件的发生频率和严重程度。
    方法:将检索可公开访问的AE数据库,以确定AIaMD的AE报告。范围搜索已经确定了3个监管区域,这些区域提供了公众对AE报告的访问:美国,联合王国,和澳大利亚。如果涉及人工智能(AI)医疗设备,将包括AE进行分析。作为没有人工智能的医疗设备的软件不在本审查的范围内。数据提取将使用为此审查设计的数据提取工具进行,并将由AUK和第二位审查者独立完成。将进行描述性分析,以确定报告的不良事件类型,和他们的频率,对于不同类型的AIaMD。将根据现有的监管指导对AE进行分析和表征。
    结果:范围搜索正在进行,筛查将于2024年4月开始。数据提取和合成将于2024年5月开始,计划于2024年8月完成。该审查将重点介绍针对不同类型的AI医疗设备报告的AE类型以及差距所在。预计与AIaMD相关的间接损害的报告率将特别低。
    结论:据我们所知,这将是对3个不同监管来源报告的与AIaMD相关的AE的首次系统评价.审查将集中在现实世界的证据,这带来了某些限制,再加上监管数据库的不透明度。该审查将概述AIaMD报告的AE的特征和频率,并帮助监管机构和政策制定者继续开发强大的安全监控流程。
    PRR1-10.2196/48156。
    BACKGROUND: The reporting of adverse events (AEs) relating to medical devices is a long-standing area of concern, with suboptimal reporting due to a range of factors including a failure to recognize the association of AEs with medical devices, lack of knowledge of how to report AEs, and a general culture of nonreporting. The introduction of artificial intelligence as a medical device (AIaMD) requires a robust safety monitoring environment that recognizes both generic risks of a medical device and some of the increasingly recognized risks of AIaMD (such as algorithmic bias). There is an urgent need to understand the limitations of current AE reporting systems and explore potential mechanisms for how AEs could be detected, attributed, and reported with a view to improving the early detection of safety signals.
    OBJECTIVE: The systematic review outlined in this protocol aims to yield insights into the frequency and severity of AEs while characterizing the events using existing regulatory guidance.
    METHODS: Publicly accessible AE databases will be searched to identify AE reports for AIaMD. Scoping searches have identified 3 regulatory territories for which public access to AE reports is provided: the United States, the United Kingdom, and Australia. AEs will be included for analysis if an artificial intelligence (AI) medical device is involved. Software as a medical device without AI is not within the scope of this review. Data extraction will be conducted using a data extraction tool designed for this review and will be done independently by AUK and a second reviewer. Descriptive analysis will be conducted to identify the types of AEs being reported, and their frequency, for different types of AIaMD. AEs will be analyzed and characterized according to existing regulatory guidance.
    RESULTS: Scoping searches are being conducted with screening to begin in April 2024. Data extraction and synthesis will commence in May 2024, with planned completion by August 2024. The review will highlight the types of AEs being reported for different types of AI medical devices and where the gaps are. It is anticipated that there will be particularly low rates of reporting for indirect harms associated with AIaMD.
    CONCLUSIONS: To our knowledge, this will be the first systematic review of 3 different regulatory sources reporting AEs associated with AIaMD. The review will focus on real-world evidence, which brings certain limitations, compounded by the opacity of regulatory databases generally. The review will outline the characteristics and frequency of AEs reported for AIaMD and help regulators and policy makers to continue developing robust safety monitoring processes.
    UNASSIGNED: PRR1-10.2196/48156.
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  • 文章类型: Systematic Review
    细味可可(FFC)以其独特的风味和香气特征而闻名,因地区而异。然而,缺乏用于描述FFC豆和巧克力的常见感官属性的全面概述。因此,我们进行了系统评价,以分析现有文献并确定最常用的感官属性来描述FFC豆和巧克力.2023年5月对WebofScience和Scopus数据库进行了系统搜索,并遵循系统审查和荟萃分析(PRISMA)指南的首选报告项目,以确保透明度和可重复性。这篇综述总结了可可的起源,并探讨了其独特的风味特征,包括焦糖,果味,花卉,malty,坚果,和辛辣的音符。虽然一些起源可能表现出类似的独特风味,它们通常使用更具体的术语来描述。另一个主要发现是,尽管在每个生产阶段都可以预期感官属性的差异,酒和巧克力之间也存在差异。有趣的是,作为最终产品的优质巧克力并不能始终如一地保留在酒中发现的独特风味。这些发现强调了在感官评估中需要精确的描述符来捕获每个来源的风味特征。因此,从豆到棒的属性的探索具有使FFC农民和巧克力生产商有效保持质量控制的潜力。
    Fine flavor cocoa (FFC) is known for its unique flavor and aroma characteristics, which vary by region. However, a comprehensive overview of the common sensory attributes used to describe FFC beans and chocolate is lacking. Therefore, a systematic review was conducted to analyze existing literature and identify the most commonly used sensory attributes to describe FFC beans and chocolate. A systematic search of the Web of Science and Scopus databases was conducted in May 2023, and Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed to ensure transparency and reproducibility. This review summarizes the origins of cocoa and explores their unique flavor profiles, encompassing caramel, fruity, floral, malty, nutty, and spicy notes. Although some origins may exhibit similar unique flavors, they are often described using more specific terms. Another main finding is that although differences in sensory attributes are anticipated at each production stage, discrepancies also arise between liquor and chocolate. Interestingly, fine chocolate as the final product does not consistently retain the distinctive flavors found in the liquor. These findings emphasize the need for precise descriptors in sensory evaluation to capture flavor profiles of each origin. As such, the exploration of attributes from bean to bar holds the potential to empower FFC farmers and chocolate producers to effectively maintain quality control.
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  • 文章类型: Journal Article
    背景:随着地球进入人类世,了解生物群落如何随时间变化变得越来越重要。多种方法被用于多变量社区分析,并被不同地应用于旨在表征社区组成中的时间动态的研究。了解这些方法及其应用方式对于确定社区生态学的最佳实践很有用。
    方法:我们回顾了1990年至2018年的生态学文献,这些文献使用多变量方法来解决时间群落动态的问题。对于每一篇符合我们搜索标准的论文,除了研究目标之外,我们还记录了用于表征时间社区动态的多变量分析的类型,生境类型,location,分类单元和实验设计。
    结果:大多数研究的时间重复次数相对较少;中位数为7个时间点。近70%的研究应用了一种以上的分析方法;诸如条形图和排序之类的描述性方法是最常用的方法。令人惊讶的是,所使用的分析类型仅与时间重复次数有关,但不是研究目的或实验设计的任何其他方面,如分类单元,或栖息地或研究年份。
    结论:这篇综述表明,大多数对了解社区动态感兴趣的研究使用相对较短的时间序列,这意味着一些,更复杂,时间分析并不广泛适用。然而,使用多变量差异的新方法越来越受欢迎,许多方法可以应用于任何长度的时间序列。
    BACKGROUND: Understanding how biological communities change over time is of increasing importance as Earth moves into the Anthropocene. A wide variety of methods are used for multivariate community analysis and are variously applied to research that aims to characterise temporal dynamics in community composition. Understanding these methods and how they are applied is useful for determining best practice in community ecology.
    METHODS: We reviewed the ecological literature from 1990 to 2018 that used multivariate methods to address questions of temporal community dynamics. For each paper that fulfilled our search criteria, we recorded the types of multivariate analysis used to characterise temporal community dynamics in addition to the research aim, habitat type, location, taxon and the experimental design.
    RESULTS: Most studies had relatively few temporal replicates; the median number was seven time points. Nearly 70% of studies applied more than one analysis method; descriptive methods such as bar graphs and ordination were the most commonly applied methods. Surprisingly, the types of analyses used were only related to the number of temporal replicates, but not to research aim or any other aspects of experimental design such as taxon, or habitat or year of study.
    CONCLUSIONS: This review reveals that most studies interested in understanding community dynamics use relatively short time series meaning that several, more sophisticated, temporal analyses are not widely applicable. However, newer methods using multivariate dissimilarities are growing in popularity and many can be applied to time series of any length.
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  • 文章类型: Journal Article
    对可持续食品的需求不断增长,导致了肉类类似物的开发,以满足灵活主义者和有意识的肉食者的需求。功能成分和加工方法的成功组合导致产生类似肉类的感官属性,这是吸引非素食消费者所必需的。感官科学是一个更广泛的研究领域,用于测量和解释对产品特性的反应,这不仅限于消费者的喜好。通过享乐测试评估接受度,以评估个人感官属性的总体喜好和喜好程度。描述性分析提供了产品感官概况的定性和定量结果。这里,通过享乐测试和/或描述性分析来评估肉类类似物和肉类补充剂的感官属性,以证明这些分析方法对消费者接受的重要性。感官评价与仪器措施相结合,如纹理和颜色,可以是有利的,并有助于改善最终产品。这些方法的未来应用可能包括在产品开发过程中整合感官测试,以更好地指导产品加工和配方。通过进行感官评价,公司和研究人员将学习有关产品属性和整体喜好的有价值的信息,有助于提供更广泛接受和可持续的食品。
    Growing demand for sustainable food has led to the development of meat analogs to satisfy flexitarians and conscious meat-eaters. Successful combinations of functional ingredients and processing methods result in the generation of meat-like sensory attributes, which are necessary to attract non-vegetarian consumers. Sensory science is a broader research field used to measure and interpret responses to product properties, which is not limited to consumer liking. Acceptance is evaluated through hedonic tests to assess the overall liking and degree of liking for individual sensory attributes. Descriptive analysis provides both qualitative and quantitative results of the product\'s sensory profile. Here, original research papers are reviewed that evaluate sensory attributes of meat analogs and meat extenders through hedonic testing and/or descriptive analysis to demonstrate how these analytical approaches are important for consumer acceptance. Sensory evaluation combined with instrumental measures, such as texture and color, can be advantageous and help to improve the final product. Future applications of these methods might include integration of sensory tests during product development to better direct product processing and formulation. By conducting sensory evaluation, companies and researchers will learn valuable information regarding product attributes and overall liking that help to provide more widely accepted and sustainable foods.
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  • 文章类型: Journal Article
    UNASSIGNED: This study aimed to systematically evaluate the effects of constraint-induced aphasia therapy (CIAT) for aphasic patients reported by randomized controlled trials.
    UNASSIGNED: Relevant randomized controlled trials were retrieved from 11 electronic databases. A methodological quality assessment was conducted in accordance with the Cochrane Handbook, and meta-analyses were performed by using RevMan 5.2. A descriptive analysis was conducted when the included trials were not suitable for a meta-analysis.
    UNASSIGNED: A total of 12 trials were included. A statistically significant group difference was shown from the meta-analysis in the results measured by the Western Aphasia Battery (random-effects model, MD = 1.23, 95% CI = 0.31 to 2.14, P < 0.01). However, there were no statistically significant differences shown in the results of the Boston Naming Test (fixed-effects model, MD = -1.79, 95% CI = -11.19 to 7.62, P > 0.05) and Aachen Aphasia Test (fixed-effects model, MD = -1.11, 95% CI = -4.49 to 2.27, P > 0.05). The descriptive analysis showed positive results in language performances of naming, repetition, and comprehension.
    UNASSIGNED: This systematic review indicated that CIAT was efficient for improving language performance with regard to naming, comprehension, repetition, written language, and oral language based on the current evidence. And this review provides some meaningful guides for clinical practice: expand the therapy duration to 2 or 3 h per day, focus on naming, and choose the best assessment tool. It also indicates a need for more rigorous, large-scale, and high-quality trials in the future.
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  • 文章类型: Journal Article
    As globalization progresses, consumers are readily exposed to many foods from various cultures. The need for studying specialty and unique food products, sometimes known as traditional, authentic, ethnic, exotic, or artisanal foods, is increasing to accommodate consumers\' growing demands. However, the number of studies conducted on these types of products with good quality sensory testing is limited. In this review, we analyzed and reviewed sensory and consumer research on specialty and unique food products. Various factors such as manufacturing, processing, or preparation methods of the samples influence the characteristics of food products and their acceptability. Sensory descriptive analysis can be used to distinguish characteristics that highlight these differences, and consumer research is used to identify factors that affect acceptability. Familiarity with product attributes contributes to consumer acceptance. When cross-cultural consumer research is conducted to support product market placement and expansion, sensory descriptive analysis should be conducted in parallel to define product characteristics. This allows better prediction of descriptors that influence consumer acceptability, leading to appropriate product modification and successful introduction.
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