data science

数据科学
  • 文章类型: Journal Article
    镰状细胞病(SCD)是一种严重的遗传性贫血,在非洲五岁以下儿童死亡率中占50%至80%。坦桑尼亚每年有一万一千婴儿患有SCD,在尼日利亚之后排名第四,刚果民主共和国和印度。缺乏良好描述的SCD队列是非洲SCD健康研究的主要障碍。
    本文介绍了坦桑尼亚的镰刀泛非联盟(SPARCO)数据库,从发展来看,研究仪器的设计,数据收集,数据分析和数据质量问题的管理。
    SPARCO注册中心使用现有的Muhimbili镰状细胞队列(MSC)研究案例报告表(CRF),后来协调了SickleInAfrica联盟的数据元素,以开发研究电子数据捕获(REDCap)工具。通过各种策略招募患者,包括每年6月世界镰状细胞日和9月SCD宣传月期间媒体宣传和健康教育活动后的大规模筛查。通过主动监测MSC中先前参与的患者来鉴定另外的患者。
    在2017年10月至2021年5月之间招募了三千八百名患者。其中,男性1,946(51.21%),女性1,864(48.79%)。血红蛋白表型分布为3,762(99%)HbSS,3(0.08%)HbSC和35(0.92%)HbSb+地中海贫血。血红蛋白水平,入院史,在2017年12月至2021年5月期间,我们记录了输血和疼痛事件.
    坦桑尼亚SPARCO注册中心将通过促进SCD的协作数据驱动研究来改善非洲SCD的医疗保健。
    UNASSIGNED: Sickle cell disease (SCD) is a severe hereditary form of anemia that contributes between 50% and 80% of under-five mortality in Africa. Eleven thousand babies are born with SCD annually in Tanzania, ranking 4th after Nigeria, the Democratic Republic of Congo and India. The absence of well-described SCD cohorts is a major barrier to health research in SCD in Africa.
    UNASSIGNED: This paper describes the Sickle Pan African Consortium (SPARCO) database in Tanzania, from the development, design of the study instruments, data collection, analysis of data and management of data quality issues.
    UNASSIGNED: The SPARCO registry used existing Muhimbili Sickle Cell Cohort (MSC) study case report forms (CRF) and later harmonized data elements from the SickleInAfrica consortium to develop Research Electronic Data Capture (REDCap) instruments. Patients were enrolled through various strategies, including mass screening following media sensitization and health education events during World Sickle Cell Day each June and the SCD awareness month in September. Additional patients were identified through active surveillance of previously participating patients in the MSC.
    UNASSIGNED: Three thousand eight hundred patients were enrolled between October 2017 and May 2021. Of these, 1,946 (51.21%) were males and 1,864 (48.79%) were females. The hemoglobin phenotype distribution was 3,762 (99%) HbSS, 3 (0.08%) HbSC and 35 (0.92%) HbSb +thalassemia. Hemoglobin levels, admission history, blood transfusion and painful events were recorded from December 2017 to May 2021.
    UNASSIGNED: The Tanzania SPARCO registry will improve healthcare for SCD in Africa through the facilitation of collaborative data-driven research for SCD.
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  • 文章类型: Journal Article
    葡萄霜霉病(GDM),由卵菌plasmoparaviticola引起的,在有利的条件下,会导致100%的产量损失和藤蔓死亡。高分辨率多光谱卫星平台提供了跟踪快速传播疾病的机会,如GDM,异构领域。这里,我们调查了PlanetScope(3m)和SkySat(50cm)图像的容量,以进行长季节的GDM检测和监视。一组训练有素的侦察员在日内瓦的一个研究葡萄园对GDM的严重程度和发生率进行了评估,NY,美国从2020年6月到8月,2021年和2022年。对侦察后72小时内获取的卫星图像进行处理,以提取单波段反射率和植被指数(VI)。在光谱带和来自两个图像数据集的VI上训练的随机森林模型可以对高和低GDM发病率和严重性的区域进行分类,最大精度为0.85(SkySat)和0.92(PlanetScope)。然而,直到7月下旬-8月上旬,我们才观察到高损伤等级和低损伤等级的VIs之间存在显著差异.我们确定了云层覆盖,图像配准,和低光谱分辨率是实施基于卫星的GDM监视的关键挑战。这项工作建立了星载多光谱传感器检测晚期GDM的能力,并概述了将卫星遥感纳入葡萄疾病监测系统的步骤。
    Grapevine downy mildew (GDM), caused by the oomycete Plasmopara viticola, can cause 100% yield loss and vine death under conducive conditions. High resolution multispectral satellite platforms offer the opportunity to track rapidly spreading diseases like GDM over large, heterogeneous fields. Here, we investigate the capacity of PlanetScope (3 m) and SkySat (50 cm) imagery for season-long GDM detection and surveillance. A team of trained scouts rated GDM severity and incidence at a research vineyard in Geneva, NY, USA from June to August of 2020, 2021, and 2022. Satellite imagery acquired within 72 hours of scouting was processed to extract single-band reflectance and vegetation indices (VIs). Random forest models trained on spectral bands and VIs from both image datasets could classify areas of high and low GDM incidence and severity with maximum accuracies of 0.85 (SkySat) and 0.92 (PlanetScope). However, we did not observe significant differences between VIs of high and low damage classes until late July-early August. We identified cloud cover, image co-registration, and low spectral resolution as key challenges to operationalizing satellite-based GDM surveillance. This work establishes the capacity of spaceborne multispectral sensors to detect late-stage GDM and outlines steps towards incorporating satellite remote sensing in grapevine disease surveillance systems.
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  • 文章类型: Journal Article
    鉴于它们在信号转导中的核心作用,蛋白激酶(PKs)首先与癌症发展有关,由异常的细胞内信号事件引起。从那以后,PKs已成为不同治疗领域的主要靶标。治疗性干预PK依赖性疾病的优选方法是使用小分子抑制其催化磷酸基团转移活性。PK抑制剂(PKI)是最受欢迎的候选药物之一,目前有80个批准的化合物和几百个在临床试验中。在阐明人类激酶和开发强大的PK表达系统和高通量测定之后,在工业和学术环境中产生了大量的PK/PKI数据,比许多其他药物目标更重要。此外,已经报道了数百个PKs的X射线结构及其与PKI的复合物。大量的PK/PKI数据已公开提供,部分是开放科学举措的结果。通过纳入数据科学方法进一步支持PK药物发现,包括开发各种专业数据库和在线资源。与其他目标相比,化合物和活性数据丰富也使PKs成为人工智能(AI)在药物研究中应用的焦点。在这里,我们讨论了开放和数据科学在PK药物发现中的相互作用,并回顾了对其发展做出重大贡献的示例性研究,包括Kinome分析或PKI混杂性与选择性的分析。我们还仔细研究了AI方法如何开始影响PK药物的发现,因为它们的数据导向越来越大。
    Given their central role in signal transduction, protein kinases (PKs) were first implicated in cancer development, caused by aberrant intracellular signaling events. Since then, PKs have become major targets in different therapeutic areas. The preferred approach to therapeutic intervention of PK-dependent diseases is the use of small molecules to inhibit their catalytic phosphate group transfer activity. PK inhibitors (PKIs) are among the most intensely pursued drug candidates, with currently 80 approved compounds and several hundred in clinical trials. Following the elucidation of the human kinome and development of robust PK expression systems and high-throughput assays, large volumes of PK/PKI data have been produced in industrial and academic environments, more so than for many other pharmaceutical targets. In addition, hundreds of X-ray structures of PKs and their complexes with PKIs have been reported. Substantial amounts of PK/PKI data have been made publicly available in part as a result of open science initiatives. PK drug discovery is further supported through the incorporation of data science approaches, including the development of various specialized databases and online resources. Compound and activity data wealth compared to other targets has also made PKs a focal point for the application of artificial intelligence (AI) in pharmaceutical research. Herein, we discuss the interplay of open and data science in PK drug discovery and review exemplary studies that have substantially contributed to its development, including kinome profiling or the analysis of PKI promiscuity versus selectivity. We also take a close look at how AI approaches are beginning to impact PK drug discovery in light of their increasing data orientation.
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  • 文章类型: Journal Article
    医疗保健行业已经测试了管理各种来源提供的大量数据的必要性,以提供大量异构信息而闻名。使用不同的数据分析(DA)和机器学习算法方法收集和分析数据。研究人员,科学家,工业家必须管理或选择与医疗保健领域DA相关的最佳方法。这项科学研究基于DA因素和替代方案之间的决策分析。信息以合理的方式影响整个系统。这些信息在医疗保健行业中对于适当的预测和分析非常重要。评估讨论了其好处,并提出了一个分析框架。模糊层次分析法(FuzzyAHP)方法用于解决因素的权重。与理想解决方案相似度的订单偏好模糊技术(FuzzyTOPSIS)解决了医疗保健行业中使用的数据分析替代方案的排名。本文使用的模型简要讨论了DA的挑战以及解决这些挑战的方法。DA的各种因素是捕获,清洁,storage,安全,管理,reporting,可视化,更新,分享,和查询。DA替代方案包括描述性的,诊断,预测性,规定性,发现,回归,队列和推理分析。评估了DA的最大影响因素和最适合DA的方法。“清洁”因素具有最高的权重,和“更新”至少是通过模糊层次分析法实现的。数据分析的回归方法排名最高,诊断分析的排名最低。决策分析对于数据科学家和医疗提供商来说是必要的,以便在医疗保健领域适当地预测疾病。这一分析也揭示了医院的成本效益。
    The healthcare industry has been put to test the need to manage enormous amounts of data provided by various sources, which are renowned for providing enormous quantities of heterogeneous information. The data are collected and analyzed with different Data Analytic (DA) and machine learning algorithm approaches. Researchers, scientists, and industrialists must manage or select the best approach associated with DA in healthcare. This scientific study is based on decision analysis between the DA factors and alternatives. The information affects the whole system in a rational manner. This information is very important in healthcare sector for appropriate prediction and analysis. The evaluation discusses its benefits and presents an analytic framework. The Fuzzy Analytic Hierarchy Process (Fuzzy AHP) approach is used to address the weight of the factors. The Fuzzy Techniques for Order Preference by Similarity to Ideal Solution (Fuzzy TOPSIS) address the rank of the data analytic alternatives used in healthcare sector. The models used in the article briefly discuss the challenges of DA and approaches to address those challenges. The assorted factors of DA are capture, cleaning, storage, security, stewardship, reporting, visualization, updating, sharing, and querying. The DA alternatives include descriptive, diagnostic, predictive, prescriptive, discovery, regression, cohort and inferential analyses. The most influential factors of the DA and the most suitable approach for the DA are evaluated. The \'cleaning\' factor has the highest weight, and \'updating\' is achieved at least by the Fuzzy-AHP approach. The regression approach of data analysis had the highest rank, and the diagnostic analysis had the lowest rank. Decision analyses are necessary for data scientists and medical providers to predict diseases appropriately in the healthcare domain. This analysis also revealed the cost benefits to hospitals.
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  • 文章类型: Journal Article
    The estimation of the global burden of animal diseases requires the integration of multidisciplinary models: economic, statistical, mathematical and conceptual. The output of one model often serves as input for another; therefore, consistency of the model components is critical. The Global Burden of Animal Diseases (GBADs) Informatics team aims to strengthen the scientific foundations of modelling by creating tools that address challenges related to reproducibility, as well as model, data and metadata interoperability. Aligning with these aims, several tools are under development: a) GBADs\'Trusted Animal Information Portal (TAIL) is a data acquisition platform that enhances the discoverability of data and literature and improves the user experience of acquiring data. TAIL leverages advanced semantic enrichment techniques (natural language processing and ontologies) and graph databases to provide users with a comprehensive repository of livestock data and literature resources. b) The interoperability of GBADs\'models is being improved through the development of an R-based modelling package and standardisation of parameter formats. This initiative aims to foster reproducibility, facilitate data sharing and enable seamless collaboration among stakeholders. c) The GBADs Knowledge Engine is being built to foster an inclusive and dynamic user community by offering data in multiple formats and providing user-friendly mechanisms to garner feedback from the community. These initiatives are critical in addressing complex challenges in animal health and underscore the importance of combining scientific rigour with user-friendly interfaces to empower global efforts in safeguarding animal populations and public health.
    L\'estimation de l\'impact mondial des maladies animales nécessite l\'utilisation intégrée de modèles issus de diverses disciplines : économiques, statistiques, mathématiques et conceptuels. Les données de sortie d\'un modèle constituent souvent celles d\'entrée d\'un autre modèle ; la cohérence des composantes des différents modèles est donc primordiale. L\'équipe informatique du programme \" Impact mondial des maladies animales \" (GBADs) s\'efforce de consolider les bases scientifiques de l\'utilisation des modèles en mettant au point des outils permettant de résoudre les problèmes de reproductibilité et d\'améliorer l\'interopérabilité entre les différents modèles, données et métadonnées. En phase avec ces objectifs, plusieurs outils sont en cours de développement : a) le Portail du GBADs \" Trusted Animal Information Portal \" (TAIL) est une plateforme d\'acquisition de données qui facilite l\'accès aux données et à la littérature, tout en améliorant l\'expérience utilisateur lors de l\'acquisition des données. Le portail TAIL s\'appuie sur des techniques avancées d\'enrichissement sémantique (traitement du langage naturel et ontologies) et sur des bases de données graphiques pour apporter aux utilisateurs un référentiel complet des données et des ressources documentaires relatives aux animaux d\'élevage ; b) l\'interopérabilité des modèles du GBADs est en voie d\'amélioration grâce à la mise au point d\'un progiciel de modélisation fondé sur R et à la normalisation des formats de paramètres. Cette initiative vise à favoriser la reproductibilité, à faciliter le partage de données et à permettre une collaboration transparente entre les parties prenantes ; c) le moteur de connaissances du GBADs, en cours de construction, vise à encourager une communauté d\'utilisateurs inclusive et dynamique en proposant des données dans une multiplicité de formats ainsi que des mécanismes conviviaux pour recueillir les commentaires de la communauté. Ces initiatives se révéleront indispensables pour relever les défis complexes de la santé animale et soulignent l\'importance d\'associer une grande rigueur scientifique à la convivialité des interfaces, afin de donner encore plus d\'élan aux efforts déployés dans le monde pour protéger les populations animales et la santé publique.
    La estimación del impacto global de las enfermedades animales requiere la integración de modelos multidisciplinarios: económicos, estadísticos, matemáticos y conceptuales. El resultado de un modelo a menudo sirve de entrada para otro; por lo tanto, la coherencia entre los distintos componentes es fundamental. El equipo de informática del programa sobre el Impacto Global de las Enfermedades Animales (GBADs) tiene como objetivo fortalecer los fundamentos científicos de la modelización mediante la creación de herramientas que aborden los retos relacionados con la reproducibilidad, así como con la interoperabilidad de los modelos, datos y metadatos. En consonancia con estos objetivos, se están desarrollando varias herramientas: a) El Portal del GBADs \"Trusted Animal Information Portal\" (TAIL) es una plataforma de adquisición de datos que mejora tanto la descubribilidad de datos y bibliografía como la experiencia del usuario a la hora de obtener datos. El portal TAIL utiliza técnicas avanzadas de enriquecimiento semántico (procesamiento del lenguaje natural y ontologías), así como bases de datos de grafos, para ofrecer a los usuarios un repositorio completo de datos sobre ganadería y recursos bibliográficos. b) Se está mejorando la interoperabilidad de los modelos del GBADs mediante el desarrollo de un paquete de modelización en R y la normalización de los formatos de los parámetros. Esta iniciativa pretende fomentar la reproducibilidad, facilitar el intercambio de datos y permitir una colaboración fluida entre las partes interesadas. c) El Motor de Conocimiento del GBADs se está construyendo con el objetivo de fomentar una comunidad de usuarios inclusiva y dinámica, ofreciendo datos en diferentes formatos y proporcionando mecanismos fáciles de usar para recopilar comentarios de la comunidad. Estas iniciativas son fundamentales para hacer frente a los complejos retos en el ámbito de la sanidad animal y subrayan la importancia de combinar el rigor científico con interfaces fáciles de usar para potenciar los esfuerzos mundiales encaminados a proteger a las poblaciones animales y la salud pública.
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  • 文章类型: Journal Article
    快速发展的人工智能(AI)领域可能很快就会为临床医生提供具有极高准确性的建模和预测围手术期问题的算法。这里,我们概述了AI在术前风险分层和术中事件预测中的新兴应用,其中算法性能已被证明超过常用的传统风险预测工具。在提供具有超人远见的新颖围手术期实践的诱人观点的同时,人工智能的有限范围和缺乏透明度仍然是广泛采用的关键挑战。目前还不清楚机器学习是否能影响人类临床实践,从而对患者的预后产生现实影响。
    The rapidly developing field of artificial intelligence (AI) may soon equip clinicians with algorithms that model and predict perioperative problems with extreme accuracy. Here, we outline emerging AI applications in preoperative risk stratification and intraoperative event prediction, where algorithm performance has been shown to outstrip commonly used conventional risk prediction tools. While offering an enticing view of a novel perioperative practice with superhuman foresight, AI\'s limited scope and lack of transparency remain key challenges for widespread adoption. As yet it is unclear whether machine learning alone can influence human clinical practice to exert real-world effects on patient outcomes.
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  • 文章类型: Journal Article
    背景:基于癌症登记数据的生存分析对于监测医疗保健的有效性至关重要。随着新方法的出现,适用于癌症登记数据的统计工具汇编正在增长。近年来,开发了用于生存分析的机器学习方法。这项研究的目的是在以前未使用的数据集上比较建立良好的Cox回归和新颖的机器学习方法的模型性能。
    方法:该研究是基于石勒苏益格-荷尔斯泰因癌症注册中心的肺癌数据。比较了四种生存分析模型:Cox比例风险回归(CoxPH)作为最常用的统计模型,以及随机生存森林(RSF)和两个基于DeepSurv和TabNet方法的神经网络架构。使用一致性指数(C-I)对模型进行评估,Brier评分和AUC-ROC评分。此外,为了更深入地了解模型的决策过程,我们使用排列特征重要性评分和SHAP值确定了对患者生存率影响较大的特征.
    结果:使用包括国际癌症控制联盟(UICC)建立的癌症分期的数据集,性能最好的模型是CoxPH(C-I:0.698±0.005),使用包含肿瘤大小的数据集,淋巴结和转移状态(TNM)导致RSF作为最佳性能模型(C-I:0.703±0.004)。可解释性指标表明,模型首先依赖于结合的UICC分期和转移状态,这与其他研究相对应。
    结论:研究的方法与流行病学研究人员创建更准确的生存模型高度相关,这可以帮助医生就肺癌患者的适当治疗和管理做出明智的决定,最终提高生存和生活质量。
    BACKGROUND: Survival analysis based on cancer registry data is of paramount importance for monitoring the effectiveness of health care. As new methods arise, the compendium of statistical tools applicable to cancer registry data grows. In recent years, machine learning approaches for survival analysis were developed. The aim of this study is to compare the model performance of the well established Cox regression and novel machine learning approaches on a previously unused dataset.
    METHODS: The study is based on lung cancer data from the Schleswig-Holstein Cancer Registry. Four survival analysis models are compared: Cox Proportional Hazard Regression (CoxPH) as the most commonly used statistical model, as well as Random Survival Forests (RSF) and two neural network architectures based on the DeepSurv and TabNet approaches. The models are evaluated using the concordance index (C-I), the Brier score and the AUC-ROC score. In addition, to gain more insight in the decision process of the models, we identified the features that have an higher impact on patient survival using permutation feature importance scores and SHAP values.
    RESULTS: Using a dataset including the cancer stage established by the Union for International Cancer Control (UICC), the best performing model is the CoxPH (C-I: 0.698±0.005), while using a dataset which includes the tumor size, lymph node and metastasis status (TNM) leads to the RSF as best performing model (C-I: 0.703±0.004). The explainability metrics show that the models rely on the combined UICC stage and the metastasis status in the first place, which corresponds to other studies.
    CONCLUSIONS: The studied methods are highly relevant for epidemiological researchers to create more accurate survival models, which can help physicians make informed decisions about appropriate therapies and management of patients with lung cancer, ultimately improving survival and quality of life.
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  • 文章类型: Journal Article
    暂无摘要。
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  • 文章类型: Journal Article
    “数据科学家”很快变得无处不在,经常臭名昭著,但是他们一直在与小说角色的模糊性作斗争。本文研究了数据科学在Twitter上的集体定义。
    该分析通过文化视角和1,025至752,815条推文的互补数据集来应对研究边界和实质不明确的紧急案例的挑战。它汇集了有关数据科学的推文帐户之间的关系,他们使用的标签,指示目的,以及他们讨论的话题。
    第一个结果再现了熟悉的商业和技术动机。其他结果揭示了对新的实践和道德标准的关注,这是构建数据科学的独特动机。
    这篇文章为通常抽象的数据集中的本地含义提供了敏感性,并提供了一种启发式方法,用于导航日益丰富的数据集以获得令人惊讶的见解。对于数据科学家来说,它提供了一个指导,让自己相对于他人定位,以驾驭自己的职业未来。
    UNASSIGNED: \"Data scientists\" quickly became ubiquitous, often infamously so, but they have struggled with the ambiguity of their novel role. This article studies data science\'s collective definition on Twitter.
    UNASSIGNED: The analysis responds to the challenges of studying an emergent case with unclear boundaries and substance through a cultural perspective and complementary datasets ranging from 1,025 to 752,815 tweets. It brings together relations between accounts that tweeted about data science, the hashtags they used, indicating purposes, and the topics they discussed.
    UNASSIGNED: The first results reproduce familiar commercial and technical motives. Additional results reveal concerns with new practical and ethical standards as a distinctive motive for constructing data science.
    UNASSIGNED: The article provides a sensibility for local meaning in usually abstract datasets and a heuristic for navigating increasingly abundant datasets toward surprising insights. For data scientists, it offers a guide for positioning themselves vis-à-vis others to navigate their professional future.
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  • 文章类型: Journal Article
    背景:倍数变化是生物医学研究中量化组学变量群体差异的常用指标。然而,不一致的计算方法和不充分的报告导致结果差异。这项研究评估了各种倍数变化计算方法,旨在推荐一种首选方法。方法:倍数变化计算的主要区别在于定义对数比计算的组期望值。要在“压力测试”场景中挑战方法的互换性,我们生成了具有不同分布的不同人工数据集(身份,制服,正常,log-normal,以及这些的混合物),并将计算出的倍数变化与已知值进行比较。此外,我们分析了一组多组学生物医学数据,以估计这些发现在多大程度上适用于现实世界的数据.结果:使用算术平均值作为治疗组和参考组的预期值,比其他方法更频繁地产生不准确的倍数变化值。特别是当亚组分布和/或标准偏差显着差异时。结论:算术平均法,通常被认为是标准的,或者在没有考虑替代方案的情况下被挑选出来,劣于组期望值的其他定义。使用中位数的方法,几何平均值,或成对的倍数变化组合对违反等方差或不同组分布更稳健。坚持对数据分布不太敏感的方法,无需权衡取舍,并在科学报告中准确报告计算方法是确保正确解释和可重复性的合理做法。
    Background: Fold change is a common metric in biomedical research for quantifying group differences in omics variables. However, inconsistent calculation methods and inadequate reporting lead to discrepancies in results. This study evaluated various fold-change calculation methods aiming at a recommendation of a preferred approach. Methods: The primary distinction in fold-change calculations lies in defining group expected values for log ratio computation. To challenge method interchangeability in a \"stress test\" scenario, we generated diverse artificial data sets with varying distributions (identity, uniform, normal, log-normal, and a mixture of these) and compared calculated fold-changes to known values. Additionally, we analyzed a multi-omics biomedical data set to estimate to what extent the findings apply to real-world data. Results: Using arithmetic means as expected values for treatment and reference groups yielded inaccurate fold-change values more frequently than other methods, particularly when subgroup distributions and/or standard deviations differed significantly. Conclusions: The arithmetic mean method, often perceived as standard or picked without considering alternatives, is inferior to other definitions of the group expected value. Methods using median, geometric mean, or paired fold-change combinations are more robust against violations of equal variances or dissimilar group distributions. Adhering to methods less sensitive to data distribution without trade-offs and accurately reporting calculation methods in scientific reports is a reasonable practice to ensure correct interpretation and reproducibility.
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