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World Journal of Clinical Pediatrics 2025年第1期14卷 63-68页

作者： Yan Pan Fu-Yong Jiao Department of Pediatrics The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina Shaanxi Kawasaki Disease Diagnosis and Treatment Center Children's HospitalShaanxi Provincial People's Hospital of Xi'anJiaotong UniveristyXi'an 710000Shaanxi ProvinceChina

This study aims to evaluate the performance of six distinct z-score formulas in diagnosing coronary artery dilation in Kawasaki disease(KD)patients,with a focus on their clinical applicability across diverse populations.A retrospective analysis was conducted using comparative statistical methods to assess the sensitivity and specificity of each *** Kobayashi and Dallaire formulas demonstrated the highest sensitivity in China,particularly in younger patients with prolonged fever *** findings provide evidence-based recommend-ations for selecting z-score formulas to optimize diagnostic precision in KD patients.

关键词： Kawasaki disease Early diagnosis z-score Children

z-score在胎儿主动脉弓缩窄中的应用研究

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中国超声医学杂志 2021年第12期37卷 1392-1396页

作者：纪学芹张思敏赵媛夏艳吴阳宁夏回族自治区妇幼保健院超声科首都医科大学附属北京妇产医院

目的建立正常胎儿心脏血管径线z-score模型,探讨运用z-score模型在胎儿主动脉弓缩窄中的诊断价值。方法本研究正常组纳入800例正常胎儿,CoA组纳入50例CoA胎儿,利用二维超声声像图测量左心房内径(LAID)、左心室内径(LVID)、右心房内径(RA... 详细信息

目的建立正常胎儿心脏血管径线z-score模型,探讨运用z-score模型在胎儿主动脉弓缩窄中的诊断价值。方法本研究正常组纳入800例正常胎儿,CoA组纳入50例CoA胎儿,利用二维超声声像图测量左心房内径(LAID)、左心室内径(LVID)、右心房内径(RAID)、右心室内径(RVID)、主肺动脉(MPA)内径、升主动脉(AAO)内径、主动脉弓峡部(AAI)内径、动脉导管(DA)内径、降主动脉(DAO)内径,以孕周为自变量建立正常胎儿心脏大血管径线z-score数据模型,绘制散点图分析两组数据结果。结果 CoA组胎儿RAID z-score、RVID z-score、MPA z-score、DA z-score的均数大于正常组胎儿;CoA组胎儿LVID z-score、AAO z-score、AAI z-score的均数小于正常组胎儿,差异均有统计学意义。散点图中显示CoA组AAI z-score、AAO z-score、DA z-score与正常组明显分开分布,差异有统计学意义;分析以上指标的灵敏度、特异度、阳性预测值、阴性预测值、阳性似然比、阴性似然比、约登指数,分别为:AAI z-score(90%,94.9%,52.3%,99.3%,17.65,0.1,0.849);AAO z-score(98%,88.3%,34.3%,99.9%,8.38,0.02,0.863);DA z-score(76%,88.9%,29.9%,98.3%,6.85,0.27,0.649)。结论本研究建立的正常胎儿z-score数据模型可作为胎儿超声心动图检查的参考依据;胎儿AAI z-scorez-scorez-score>+2可作为产前诊断CoA的有效指标。

关键词：主动脉弓缩窄 z-score 超声心动图胎儿

Empirical Analysis of the Relationship Between Altman’s z-score and Stock Performance Based on Airline Companies Listed in the United States

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Proceedings of Business and Economic Studies 2022年第6期5卷 51-58页

作者： Yaofeng Hu zhan Qi Di Wang Yansen Wu Business School University of NottinghamNottingham NG81BBUnited Kingdom

This research looks at any relevance between Altman’s z-score and the stock market performance of airline companies in the United States(US).Nearly a thousand pieces of data on various aspects of operation and financial status from 81 airline companies in the US are ***,stock return is used as an indicator of firm stock performance in this *** order to satisfy the purpose of determining the relationship between z-score and stock performance as well as what may be inferred from high stock returns with regard to z-score,two different regression processes are carried *** first regression tests the relationship between z-score and stock return,while the second regression examines whether there is a difference in z-scores between well-performing airline companies and poorly performing ones using dummy *** results reveal that there is a significant positive correlation between the z-scores of US airline companies and their stock performance;besides,high stock returns potentially imply relatively high z-scores and vice ***,one of the crucial steps that US airline companies must make is to strengthen their balance sheets in order to draw investors to make investments in their businesses.

关键词： z-score US airline companies Stock performance

Multiple z-score Based Method for Noninvasive Prenatal Test Using Cell-Free DNA in Maternal Plasma

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Open Journal of Genetics 2017年第1期7卷 1-8页

作者： Hyuk Jung Kwon Amit Goyal Heesu Im Kichan Lee Seon Young Yun Yoon Hee Kim Sungjong Lee Mi-Gyeong Lee Hyuna Lee Reena Garg Boram Park Soyoung Choi Joungsu Joo Jin-Sik Bae Min-Jeong Kim Min Seob Lee Sunghoon Lee EONE-DIAGNOMICS Genome Center Co. Ltd. Inchon Korea

Objective: To improve the detecting accuracy of chromosomal aneuploidy of fetus by non-invasive prenatal testing (NIPT) using next generation sequencing data of pregnant women’s cell-free DNA. Methods: We proposed the multi-z method which uses 21 z-scores for each autosomal chromosome to detect aneuploidy of the chromosome, while the conventional NIPT method uses only one z-score. To do this, mapped read numbers of a certain chromosome were normalized by those of the other 21 chromosomes. Average and standard deviation (SD), which are used for calculating z-score of each sample, were obtained with normalized values between all autosomal chromosomes of control samples. In this way, multiple z-scores can be calculated for 21 autosomal chromosomes except oneself. Results: Multi-z method showed 100% sensitivity and specificity for 187 samples sequenced to 3 M reads while the conventional NIPT method showed 95.1% specificity. Similarly, for 216 samples sequenced to 1 M reads, Multi-z method showed 100% sensitivity and 95.6% specificity and the conventional NIPT method showed a result of 75.1% specificity. Conclusion: Multi-z method showed higher accuracy and robust results than the conventional method even at low coverage reads.

关键词： Cell-Free DNA z-score Multiple Thresholds Coefficient of Variance Noninvasive Prenatal Testing NIPT

z-score模型在上市公司财务风险分析中的应用研究——湖北及中部地区的数据

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财会通讯(学术版) 2007年第10期 42-44页

作者：邓明然胡蕾武汉理工大学管理学院武汉理工大学管理学院湖北武汉430070

本文选取2003￣2005年度湖北省及我国中部地区其他省上市公司全部A股作为样本,运用z-score模型对上市公司财务风险进行了分析。认为只有在此基础上进一步测算其长、短期偿债能力指标,才能更好地把握公司的财务风险。

关键词： z-score 模型长期财务风险短期财务风险

国内外信息检索研究热点分析——基于z-score标准化的词频

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图书馆建设 2009年第1期 93-98页

作者：苍宏宇谭宗颖中国科学院研究生院北京100049 中国科学院国家科学图书馆北京100190

通过利用基于z-score标准化的词频统计分析法,从研究主题、关键技术和学科特点对国内外信息检索领域研究的热点进行分析,可以看出国内外基于网络环境的研究成为重要主题;研究的关键技术大体相同,但侧重点不同;国外的研究集中在计算机领... 详细信息

通过利用基于z-score标准化的词频统计分析法,从研究主题、关键技术和学科特点对国内外信息检索领域研究的热点进行分析,可以看出国内外基于网络环境的研究成为重要主题;研究的关键技术大体相同,但侧重点不同;国外的研究集中在计算机领域,国内集中在图书情报领域。而未来信息检索中,网络信息检索将得到进一步的发展,知识、多媒体等将成为信息检索的关键主题,新信息检索技术将会成为日后关注的重点。

关键词：词频统计法 z-score 信息检索对比分析

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Comparative Analysis of Credit-Strength among Industries of Bangladesh:Altman’s z-score Measurement

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Journal of Sustainable Business and Economics 2023年第1期6卷 26-43页

作者： Md.Al Amin Department of Accounting Mawlana Bhashani Science and Technology UniversitySantoshTangail1902Bangladesh

The main motive of the study is to explore the financial position of prominent industries in Bangladesh to give direction to investors for sound investment *** Altman z-score model has been used to assess the financial soundness of the 23 companies of five prominent industries in *** data have been collected from the annual reports of the selected *** study found that 20%and 40%of the selected companies of the ceramic industry and tannery industry fall on the safe form respectively that means where investors can invest without any doubt as they are financially ***,28.57%,40%,and 25%of the selected companies of cement,ceramic,and paper and printing industries stand in the grey zone respectively which indicates the companies have a good chance of bankruptcy within two *** 71.43%,40%,75%,60%,and 100%of companies in the cement,ceramic,paper&printing,tannery,and jute industries’financial conditions are not satisfactory respectively as they fall in the distress *** only 20%of the selected industries fall in the safe *** means the overall financial soundness of the selected industries is not *** study will be an important source for further study in the field of credit strength *** actor of society those are involved in the business(investors,lenders,workers,suppliers,financial institutions as well as the economy itself)can be able to make adequate decisions by the findings of the study.

关键词： Credit-strength z-score Financial ratios

正常儿童三维左室心肌应变特征及z-score建立的研究

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中国超声医学杂志 2020年第3期36卷 209-211页

作者：徐娟章春泉吴颖刘燕玲刘燕娜邓艺雯许燕南昌大学第二附属医院超声科南昌大学第二附属医院儿科

目的分析正常儿童左室心肌应变的变化特征并建立其z-score。方法获取173例正常儿童的三维左室整体纵向、径向、圆周应变(GLS、GRS、GCS)参数。比较不同体表面积(BSA)组正常儿童三维应变参数的差异。有明显变化趋势者做进一步回归分析,... 详细信息

目的分析正常儿童左室心肌应变的变化特征并建立其z-score。方法获取173例正常儿童的三维左室整体纵向、径向、圆周应变(GLS、GRS、GCS)参数。比较不同体表面积(BSA)组正常儿童三维应变参数的差异。有明显变化趋势者做进一步回归分析,并建立z-score。结果随着儿童BSA增加,GLS、GRS递减,差异有统计学意义;不同BSA组GCS较为均一,差异无统计学意义。年龄、身高、体质量、BSA与GLS、GRS均存在非线性相关,选取BSA作为生长发育指标建立正常儿童GLS、GRS的z-score优于年龄、身高、体质量。结论不同BSA组正常儿童左室心肌功能存在不均一性,建立正常儿童GLS、GRS的z-score,为临床定量评估儿童心肌功能提供科学、准确的方法。

关键词：儿童心功能三维斑点追踪 z-score

z-score值与血管内径比值在胎儿主动脉弓缩窄中的应用研究

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Z-score值与血管内径比值在胎儿主动脉弓缩窄中的应用研究

作者：张思敏宁夏医科大学

学位级别：硕士

目的本研究旨在应用二维超声心动图测量并分析正常胎儿和主动脉弓缩窄（Co A）胎儿的心脏大血管径线z-score值及其各自血管径线比值,探讨正常胎儿心脏血管径线z-score数据模型和血管内径比值在胎儿Co A产前诊断中的价值。方法本研究正... 详细信息

目的本研究旨在应用二维超声心动图测量并分析正常胎儿和主动脉弓缩窄（Co A）胎儿的心脏大血管径线z-score值及其各自血管径线比值,探讨正常胎儿心脏血管径线z-score数据模型和血管内径比值在胎儿Co A产前诊断中的价值。方法本研究正常组纳入800例正常胎儿,Co A组纳入50例Co A胎儿,利用二维超声声像图测量左心房内径（LAID）、左心室内径（LVID）、右心房内径（RAID）、右心室内径（RVID）、主肺动脉（MPA）内径、升主动脉（AAO）内径、主动脉弓峡部（AAI）内径、动脉导管（DA）内径、降主动脉（DAO）内径,计算正常组及病例组RAID/LAID,RVID/LVID,MPA/AAO,DA/AAI,DAO/AAI,AAO/AAI,AAO/DAO的比值。以孕周为自变量建立正常胎儿心脏大血管径线z-score数据模型,计算Co A组9项指标的z-score值并进行分析比较。结果*** A组RAID z-score、RVID z-score、MPA z-score、DA z-score的均数以及RAID/LAID、RVID/LVID、MPA/AAO、DA/AAI、DAO/AAI、AAO/AAI比值的均数大于正常值胎儿;Co A组LVID z-score、AAO z-score、AAI z-score的均数及AAO/DAO比值均数小于正常组胎儿（P＜0.05）。2.散点图中显示Co A组AAO z-score、DA z-score、AAI z-score、MPA/AAO、DA/AAI、DAO/AAI及AAO/DAO比值与正常组明显分开分布,差异有统计学意义（P＜0.05）。***曲线显示以下指标的灵敏度、特异度、阳性预测值、阴性预测值、阳性似然比、阴性似然比、约登指数、曲线下面积（AUC）、截断值,并按照诊断效能由高至低排序:AAI z-score（90%,94.9%,52.3%,99.3%,17.65,0.1,0.849,0.992,-2）;DAO/AAI（100%,90.4%,39.4%,100%,10.41,0,0.904,0.996,1.7）;DA/AAI（100%,89.3%,37%,100%,9.35,0,0.893.0.998,1.5）;MPA/AAO（90%,89.8%,35.4%,99.3%,8.82,0.11,0.798,0.954,1.6）;AAO z-score（98%,88.3%,34.3%,99.9%,8.38,0.02,0.863,0.992,-2）;AAO/DAO（82%,89.3%,32.3%,98.8%,7.7,0.2,0.713,0.96,0.8）结论1.本研究建立的正常胎儿z-score数据模型可作为胎儿超声心动图检查的参考依据。*** z-score＜-2、AAO z-score＜-2和比值指标DA/AAI增大、DAO/AAI增大、MPA/AAO增大、AAO/DAO减小可作为产前超声预测Co A的依据。

关键词：主动脉弓缩窄 z-score 超声心动图胎儿

应用三维超声建立正常胎儿心功能指标z-score数据模型

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中国超声医学杂志 2012年第12期28卷 1123-1126页

作者：林美芳谢红宁郑菊朱云晓李丽娟中山大学附属第一医院超声科

目的建立正常胎儿心功能指标随孕周变化的z-score数据模型,定量评估胎儿心功能。方法应用三维超声时间-空间关联成像技术(STIC)联合虚拟器官计算机辅助分析法(VOCAL)测量和计算胎儿心功能指标,包括左、右心室舒张末期(EDV)、收缩末期(E... 详细信息

目的建立正常胎儿心功能指标随孕周变化的z-score数据模型,定量评估胎儿心功能。方法应用三维超声时间-空间关联成像技术(STIC)联合虚拟器官计算机辅助分析法(VOCAL)测量和计算胎儿心功能指标,包括左、右心室舒张末期(EDV)、收缩末期(ESV)容积、心搏出量(SV)及心输出量(CO)。以孕周(GA)为自变量对所测的心功能指标进行回归分析,并校正标准差(SD),建立各心功能指标的z-score模型。结果共获293例17～32孕周正常胎儿心脏STIC容积数据以建立模型,胎儿左、右心室EDV、ESV、SV、CO随GA的增加呈指数增长。由各心功能指标的预测平均值及SD,计算出心功能指标任一测值的z-score。结论运用三维超声STIC技术测量胎儿左、右心室EDV、ESV、SV、CO,建立正常胎儿心功能指标的z-score数据模型,通过计算z-score,定量评估胎儿心功能。

关键词：胎儿心功能 z-score 三维超声时间-空间关联成像虚拟器官计算机辅助分析法