Data Interpretation

数据解释
  • 文章类型: Journal Article
    目的:对零假设显著性检验的依赖往往导致对研究结果的误解。常见的误解包括统计学上无显著差异(p≥0.05)意味着组间没有差异,并且具有统计学意义的发现(p<0.05)是无偏的并且具有临床意义。我们旨在开发一种工具-结论生成器-来减轻这些误解。
    方法:我们回顾了结论生成器的内容,并使用已发布和模拟的数据验证了其输出。
    结果:结论生成器是一个免费的在线应用程序,旨在根据点估计和置信区间的值和临床解释为科学论文生成结论。支持相对和绝对效果度量。它提供了两种解释模式:(1)统计模式提供了对结果的准确统计解释,具有优势和非劣效性界限的可选规范;(2)临床模式评估用户指定的点估计和置信限度的临床重要性。两种模式都没有不受控制的偏见。用户必须指定小数的数量,有益效果的方向(例如,相对风险<1vs.>1),和详细程度(简洁与阐述)用于输出。验证证实了结论生成器解释研究结果的能力,考虑到随机误差和临床相关性,同时避免与零假设显著性检验相关的常见误解。
    结论:结论生成器通过强调估计和临床相关性而不是假设检验,促进了对研究结果的适当解释。
    OBJECTIVE: Reliance on null hypothesis significance testing often leads to misinterpretation of research results. Common misinterpretations include that a statistically nonsignificant difference (p≥0.05) implies no difference between groups, and that a statistically significant finding (p<0.05) is unbiased and clinically important. We aimed to develop a tool - the Conclusion Generator - to mitigate these misconceptions.
    METHODS: We reviewed the content of the Conclusion Generator and validated its output using published and simulated data.
    RESULTS: The Conclusion Generator is a free online application designed to generate conclusions for scientific papers based on the values and clinical interpretation of the point estimate and confidence interval. Both relative and absolute measures of effect are supported. It offers two modes for interpretation: (1) Statistical mode provides an accurate statistical interpretation of results, with an optional specification of superiority and noninferiority bounds; (2) Clinical mode evaluates the clinical importance of the point estimate and confidence limits as specified by the user. Both modes assume no uncontrolled biases. Users must specify the number of decimals, the direction of a beneficial effect (e.g., relative risk <1 vs. >1), and the level of detail (concise vs. elaborated) for the output. The validation confirmed the Conclusion Generator\'s capability to interpret research results, considering random error and clinical relevance, while avoiding common misinterpretations associated with null hypothesis significance testing.
    CONCLUSIONS: The Conclusion Generator facilitates an appropriate interpretation of research results by emphasizing estimation and clinical relevance over hypothesis testing.
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  • 文章类型: Journal Article
    实用竣工计划,通常提供有关地下公用设施位置和空间位置的信息,已知包括不准确。多年来,对使用一系列传感设备进行公用事业调查的依赖增加了,以试图解决公用事业竣工的不准确性,并减轻挖掘活动期间地下公用事业意外罢工的高比率。已证明将数据融合到公用事业工程和调查实践中可以有效地生成具有更高准确性的信息。然而,数据解释的复杂性和相关的高昂成本,特别是对于大型项目,是限制因素。本文解决了数据解释的问题,成本,以及具有新颖框架的大规模实用程序映射,该框架通过将自动生成的初始映射中的数据与已构建的数据融合来生成概率推断。概率推断暴露了高度不确定性的区域,强调他们是进一步调查的主要目标。所提出的模型是三个主要过程的集合。首先,自动初始地图创建是一种新颖的贡献,通过使已识别的实用程序附件服从实用程序推理规则来支持快速实用程序映射。第二和第三过程包括将创建的初始效用图与来自效用竣工或历史卫星图像数据的可用知识融合,然后使用置信度值估计器评估不确定性。所提出的框架通过生成最终的概率效用图,超越了先前作品中对掩埋效用位置的点估计,揭示归因于连接地上特征的每个段的置信水平。在这种方法中,公用事业基础设施以低成本快速映射,将更详细的效用调查的范围限制在低置信度区域。在抵制过时时,该框架的另一个独特优势是映射的动态特性,以便在新知识到来时自动更新信息。这最终最大限度地减少了实用的问题,即随着时间的推移,建筑精度下降。
    Utility as-built plans, which typically provide information about underground utilities\' position and spatial locations, are known to comprise inaccuracies. Over the years, the reliance on utility investigations using an array of sensing equipment has increased in an attempt to resolve utility as-built inaccuracies and mitigate the high rate of accidental underground utility strikes during excavation activities. Adapting data fusion into utility engineering and investigation practices has been shown to be effective in generating information with improved accuracy. However, the complexities in data interpretation and associated prohibitive costs, especially for large-scale projects, are limiting factors. This paper addresses the problem of data interpretation, costs, and large-scale utility mapping with a novel framework that generates probabilistic inferences by fusing data from an automatically generated initial map with as-built data. The probabilistic inferences expose regions of high uncertainty, highlighting them as prime targets for further investigations. The proposed model is a collection of three main processes. First, the automatic initial map creation is a novel contribution supporting rapid utility mapping by subjecting identified utility appurtenances to utility inference rules. The second and third processes encompass the fusion of the created initial utility map with available knowledge from utility as-builts or historical satellite imagery data and then evaluating the uncertainties using confidence value estimators. The proposed framework transcends the point estimation of buried utility locations in previous works by producing a final probabilistic utility map, revealing a confidence level attributed to each segment linking aboveground features. In this approach, the utility infrastructure is rapidly mapped at a low cost, limiting the extent of more detailed utility investigations to low-confidence regions. In resisting obsolescence, another unique advantage of this framework is the dynamic nature of the mapping to automatically update information upon the arrival of new knowledge. This ultimately minimizes the problem of utility as-built accuracies dwindling over time.
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  • 文章类型: Journal Article
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  • 文章类型: Journal Article
    在循证实践的背景下,本文揭示了对报告和研究出版物中共享的研究结果所提供信息的理解和有用性的思考,根据统计学意义和临床意义的解释揭示差异。
    对p值(统计意义)研究报告的信息的含义和使用以及这些结果的价值和有用性的基本方面进行了分析和举例说明,对比对临床意义的额外判断的实践价值。除了建立概念上的差异,强调护士需要有能力根据其潜在实施的临床背景来区分和应用他们中的每一个.
    关于护理背景下的干预措施的研究的真正有用性在于它的实际应用和对患者的实践和益处。为了发生这种情况,护士必须充分解释科学出版物和其他研究报告提供的信息。
    UNASSIGNED: Within the context of evidence-based practice, this article exposes the reflection on the understanding and usefulness of the information provided by the research findings shared in reports and research publications, exposing differences based on the interpretation of statistical significance and clinical significance.
    UNASSIGNED: Basic aspects of the meaning and use of the information reported by research on p value (statistical significance) and the value and usefulness of these results are analyzed and exemplified, contrasting the value for the practice of an additional judgment on clinical significance. In addition to establishing conceptual differences, the need is highlighted for nurses to have the competencies to differentiate and apply each of them according to the clinical contexts of their potential implementation.
    UNASSIGNED: The real usefulness of research about interventions within the context of nursing care is given by its real application and reach for the practice and benefit for patients. For this to occur, nurses must interpret adequately the information provided by scientific publications and other research reports.
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  • 文章类型: Journal Article
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  • 文章类型: Letter
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  • 文章类型: Journal Article
    背景:最近电子健康的增长是前所未有的,特别是在COVID-19大流行之后。在eHealth中,可穿戴技术越来越多地被采用,因为它可以在日常生活环境中提供慢性和急性条件的远程监控。可穿戴技术可用于监测和跟踪日常生活环境中身体和心理压力的关键指标,为临床医生提供有用的信息。关键挑战之一是以易于解释的方式向临床医生提供大量可穿戴数据,以做出明智的决定。
    目的:这项研究的目的是设计一个可穿戴数据仪表板,名为CarePortal,呈现对临床医生有意义的可穿戴数据的分析可视化。该研究分为2个主要研究目标:了解临床医生对可穿戴数据解释和可视化的需求,并为Web应用程序开发系统架构,以可视化可穿戴数据和相关分析。
    方法:我们使用了从116名经历创伤的青少年参与者收集的可穿戴数据集。两个星期,参与者佩戴MicrosoftBand,记录心率(HR)等生理传感器数据.共收集834天的HR数据。要设计CarePortal仪表板,我们使用参与式设计方法,直接与具有临床心理学和神经心理学背景的临床医生(利益相关者)进行互动.总共从罗德岛医院和马萨诸塞州纪念健康大学招募了8名临床医生。该研究涉及参与式研讨会的5个阶段,并从了解临床医生的需求开始。在研究结束时使用用户体验问卷来定量评估用户体验。生理指标,如每日和每小时最大值,minimum,平均,HR和HR变异性的SD,以及基于人力资源的活动水平,已确定。本研究调查了可穿戴数据的各种数据可视化绘图方法,包括雷达图,堆叠条形图,散点图与线图相结合,简单的条形图,和箱线图。
    结果:在了解临床医生的需求后,我们创建了一个CarePortal仪表板。我们研讨会的结果表明,整体临床医生更喜欢汇总信息,如每日HR而不是连续HR,并希望看到可穿戴传感器数据在一段时间内的趋势(例如,days).在用户体验问卷中,获得1.4分,这表明CarePortal的使用令人兴奋(问题5),收到了类似的分数,表明CarePortal是领先的(问题8)。平均而言,临床医生报告说,CarePortal具有支持性,可用于做出知情决策.
    结论:我们得出的结论是,与可穿戴传感器数据可视化技术集成的CarePortal仪表板将是未来临床医生可以接受的工具。
    BACKGROUND: The recent growth of eHealth is unprecedented, especially after the COVID-19 pandemic. Within eHealth, wearable technology is increasingly being adopted because it can offer the remote monitoring of chronic and acute conditions in daily life environments. Wearable technology may be used to monitor and track key indicators of physical and psychological stress in daily life settings, providing helpful information for clinicians. One of the key challenges is to present extensive wearable data to clinicians in an easily interpretable manner to make informed decisions.
    OBJECTIVE: The purpose of this research was to design a wearable data dashboard, named CarePortal, to present analytic visualizations of wearable data that are meaningful to clinicians. The study was divided into 2 main research objectives: to understand the needs of clinicians regarding wearable data interpretation and visualization and to develop a system architecture for a web application to visualize wearable data and related analytics.
    METHODS: We used a wearable data set collected from 116 adolescent participants who experienced trauma. For 2 weeks, participants wore a Microsoft Band that logged physiological sensor data such as heart rate (HR). A total of 834 days of HR data were collected. To design the CarePortal dashboard, we used a participatory design approach that interacted directly with clinicians (stakeholders) with backgrounds in clinical psychology and neuropsychology. A total of 8 clinicians were recruited from the Rhode Island Hospital and the University of Massachusetts Memorial Health. The study involved 5 stages of participatory workshops and began with an understanding of the needs of clinicians. A User Experience Questionnaire was used at the end of the study to quantitatively evaluate user experience. Physiological metrics such as daily and hourly maximum, minimum, average, and SD of HR and HR variability, along with HR-based activity levels, were identified. This study investigated various data visualization graphing methods for wearable data, including radar charts, stacked bar plots, scatter plots combined with line plots, simple bar plots, and box plots.
    RESULTS: We created a CarePortal dashboard after understanding the clinicians\' needs. Results from our workshops indicate that overall clinicians preferred aggregate information such as daily HR instead of continuous HR and want to see trends in wearable sensor data over a period (eg, days). In the User Experience Questionnaire, a score of 1.4 was received, which indicated that CarePortal was exciting to use (question 5), and a similar score was received, indicating that CarePortal was the leading edge (question 8). On average, clinicians reported that CarePortal was supportive and can be useful in making informed decisions.
    CONCLUSIONS: We concluded that the CarePortal dashboard integrated with wearable sensor data visualization techniques would be an acceptable tool for clinicians to use in the future.
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  • 文章类型: Journal Article
    分析数据处理通常需要对数据进行比较,即在分离中找到异同。在这种情况下,开发了一种峰值跟踪算法来比较一维(1D)和二维(2D)色谱中的多个数据集。研究了两种应用策略:i)数据处理,其中所有色谱图均以一个序列生成并同时处理,和ii)方法优化,其中累积地产生和处理色谱图。第一种策略是对来自不同化合物类别的学术和工业样品(单克隆抗体消化,葡萄酒挥发物,聚合物颗粒顶部空间,和蛋黄酱)。一次在多达29个色谱图中跟踪峰值,但必要时可以扩大规模。然而,峰值跟踪算法对痕量分析物的准确性较低,因为,难以检测的峰值也难以追踪。第二种策略用一维液相色谱分离进行了测试,使用自动化方法开发进行了优化。与分配目标色谱图相比,方法优化策略可以更快地检测早期色谱图中分离不良的峰。与所有其他色谱图进行比较。渲染它是自动方法优化的有用工具。
    Analytical data processing often requires the comparison of data, i.e. finding similarities and differences within separations. In this context, a peak-tracking algorithm was developed to compare multiple datasets in one-dimensional (1D) and two-dimensional (2D) chromatography. Two application strategies were investigated: i) data processing where all chromatograms are produced in one sequence and processed simultaneously, and ii) method optimization where chromatograms are produced and processed cumulatively. The first strategy was tested on data from comprehensive 2D liquid chromatography and comprehensive 2D gas chromatography separations of academic and industrial samples of varying compound classes (monoclonal-antibody digest, wine volatiles, polymer granulate headspace, and mayonnaise). Peaks were tracked in up to 29 chromatograms at once, but this could be upscaled when necessary. However, the peak-tracking algorithm performed less accurate for trace analytes, since, peaks that are difficult to detect are also difficult to track. The second strategy was tested with 1D liquid chromatography separations, that were optimized using automated method-development. The strategy for method optimization was quicker to detect peaks that were still poorly separated in earlier chromatograms compared to assigning a target chromatogram, to which all other chromatograms are compared. Rendering it a useful tool for automated method optimization.
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  • 文章类型: Journal Article
    脂质组学研究脂质的组成和功能,通常采用血液或组织样本作为主要研究基质。头发最近已成为一种潜在的补充样本类型,可在疾病早期阶段识别生物标志物,并回顾性地记录个体的代谢状态,因为其检测窗口长达采样时间前几个月。然而,在以前的研究中,脂质分析的报道有限,阻碍了其开发。本研究旨在使用非靶向液相色谱-高分辨率质谱脂质组学平台评估头发的脂质覆盖率。使用最近优化的毛发代谢组学单相提取技术进行了两个不同的三步穷举提取实验,和两相Folch提取方法,该方法被认为是生物基质中脂质提取的金标准。应用脂质组学工作流程改善了头发脂质覆盖率,因为使用单相提取方法只能注释99个物种,而用Folch方法注释了六个类别的297种脂质。首次报道了头发中的几种脂质,包括N-酰基氨基酸,二自由基甘油,和辅酶Q10。该研究表明,头发脂质并不完全来自头发中的从头合成,但也包含在皮脂和血液中,使头发成为临床上有价值的基质,法医,和皮肤病学研究。对脂质成分的更好理解和回顾性分析的分析考虑提供了有价值的见解,可以将非目标头发脂质组学分析情境化,并促进头发在转化研究中的使用。
    Lipidomics investigates the composition and function of lipids, typically employing blood or tissue samples as the primary study matrices. Hair has recently emerged as a potential complementary sample type to identify biomarkers in early disease stages and retrospectively document an individual\'s metabolic status due to its long detection window of up to several months prior to the time of sampling. However, the limited coverage of lipid profiling presented in previous studies has hindered its exploitation. This study aimed to evaluate the lipid coverage of hair using an untargeted liquid chromatography-high-resolution mass spectrometry lipidomics platform. Two distinct three-step exhaustive extraction experiments were performed using a hair metabolomics one-phase extraction technique that has been recently optimized, and the two-phase Folch extraction method which is recognized as the gold standard for lipid extraction in biological matrices. The applied lipidomics workflow improved hair lipid coverage, as only 99 species could be annotated using the one-phase extraction method, while 297 lipid species across six categories were annotated with the Folch method. Several lipids in hair were reported for the first time, including N-acyl amino acids, diradylglycerols, and coenzyme Q10. The study suggests that hair lipids are not solely derived from de novo synthesis in hair, but are also incorporated from sebum and blood, making hair a valuable matrix for clinical, forensic, and dermatological research. The improved understanding of the lipid composition and analytical considerations for retrospective analysis offers valuable insights to contextualize untargeted hair lipidomic analysis and facilitate the use of hair in translational studies.
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  • 文章类型: Journal Article
    目前在临床实践中使用的多种药物已被监管机构基于利用复合终点的研究批准。复合端点很有吸引力,因为它们减少了样本大小要求,后续期,和成本。然而,解释复合端点可能是具有挑战性的,他们的滥用并不少见。对综合结果的不正确解释可能导致误导性结论,影响患者护理。为了正确解释综合结果,应该考虑几个重要的问题。复合结果的各个组成部分对患者同样重要吗?或多或少重要的终点以相似的频率发生吗?组成部分终点表现出相似的相对风险降低吗?如果这些问题得到肯定的答案,复合端点的使用和解释将是适当的。然而,如果复合端点的任何组件未能满足上述标准,解释可能变得困难,需要额外的步骤。监管机构承认这些挑战,并在基于采用复合终点的研究批准药物时具有特定的考虑因素。总之,复合终点是评估干预措施疗效和临床净获益的有价值的工具;然而,建议谨慎解释。
    Multiple drugs currently used in clinical practice have been approved by regulatory agencies based on studies that utilize composite endpoints. Composite endpoints are appealing because they reduce sample size requirements, follow-up periods, and costs. However, interpreting composite endpoints can be challenging, and their misuse is not uncommon. Incorrect interpretation of composite outcomes can lead to misleading conclusions that impact patient care. To correctly interpret composite outcomes, several important questions should be considered. Are the individual components of the composite outcome equally important to patients? Did the more and less important endpoints occur with similar frequency? Do the component endpoints exhibit similar relative risk reductions? If these questions receive affirmative answers, the use and interpretation of the composite endpoint would be appropriate. However, if any component of the composite endpoint fails to satisfy the aforementioned criteria, interpretation can become difficult, necessitating additional steps. Regulatory agencies acknowledge these challenges and have specific considerations when approving drugs based on studies employing composite endpoints. In conclusion, composite endpoints are valuable tools for evaluating the efficacy and net clinical benefit of interventions; however, cautious interpretation is advised.
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