期刊文献+
共找到42,732篇文章
< 1 2 250 >
每页显示 20 50 100
Comparison of different severity scores in correlating hemoglobin levels with the severity of hepatic decompensation: An observational study
1
作者 Himayat Ullah Sarwat Huma +13 位作者 Ghulam Yasin Muhammad Ashraf Nafisa Tahir Qazi Tahir Uddin Hossam Shabana Mostafa A R Hussein Abdulrahman Shalaby Mohammad Mossaad Alsayyad Ashraf Said Ali Farahat Hani Ismail Hamed Hazem Sayed Ahmed Ayoub Mohammed S Imam Essam Elmahdi 《World Journal of Hepatology》 2025年第1期55-63,共9页
BACKGROUND Chronic liver disease is a growing global health problem,leading to hepatic decompensation characterized by an array of clinical and biochemical complic-ations.Several scoring systems have been introduced i... BACKGROUND Chronic liver disease is a growing global health problem,leading to hepatic decompensation characterized by an array of clinical and biochemical complic-ations.Several scoring systems have been introduced in assessing the severity of hepatic decompensation with the most frequent ones are Child-Pugh score,model of end-stage liver disease(MELD)score,and MELD-Na score.Anemia is frequently observed in cirrhotic patients and is linked to worsened clinical outcomes.Although studies have explored anemia in liver disease,few have investigated the correlation of hemoglobin level with the severity of hepatic decompensation.AIM To determine the relationship between hemoglobin levels and the severity of decompensated liver disease and comparing the strength of this correlation using the Child-Pugh,MELD,and MELD-Na scores.METHODS This cross-sectional study was conducted at a tertiary care hospital with 652 decompensated liver disease patients enrolled in the study.Data was collected on demographics,clinical history,and laboratory findings,including hemoglobin levels,bilirubin,albumin,prothrombin time(international normalized ratio),sodium,and creatinine.The Child-Pugh,MELD,and MELD-Na scores were calculated.Statistical analysis was performed using Statistical Package for the Social Sciences version 26,and correlations between hemoglobin levels and severity scores were assessed using Spearman's correlation coefficient.RESULTS The study included 405 males(62.1%)and 247 females(37.9%)with an average age of 58.8 years.Significant inverse correlations were found between hemoglobin levels and Child-Pugh,MELD,and MELD-Na scores(P<0.01),with the MELD scoring system being the strongest correlator among all.One-way analysis of variance revealed significant differences in hemoglobin levels across the severity groups of each scoring system(P=0.001).Tukey's post hoc analysis confirmed significant internal differences among each severity group.CONCLUSION Understanding the correlation between hemoglobin and liver disease severity can improve patient management by offering insights into prognosis and guiding treatment decisions. 展开更多
关键词 Hepatic decompensation Hemoglobin level Chronic liver disease Child Turcotte Pugh score Model of end-stage liver disease score Model of end-stage liver disease-Na score
下载PDF
GATIS score:An innovative prognostic score for rectal neuroendocrine neoplasms
2
作者 Daniel Paramythiotis Dimitrios Tsavdaris Eleni Karlafti 《World Journal of Gastroenterology》 2025年第6期121-125,共5页
In this article,we discussed the article by Zeng et al,published in a recent issue of the World Journal of Gastroenterology.The publication represents a significant advancement in the prognostic evaluation of rectal n... In this article,we discussed the article by Zeng et al,published in a recent issue of the World Journal of Gastroenterology.The publication represents a significant advancement in the prognostic evaluation of rectal neuroendocrine neoplasms.The GATIS score is a single nomogram model that incorporates five key progno-stic factors:Tumor grade;T stage;tumor size;age;and the prognostic nutritional index.This innovation optimizes the prognostic process,delivering more accurate predictions of overall survival and progression-free survival compared to tradi-tional TNM staging and World Health Organization classification systems.The findings of the study were based on a retrospective analysis spanning 12 years and involving 1408 patients from 17 reference centers in China.In this editorial,we specifically examined the strengths and limitations of the study,the clinical implications of the GATIS score,and the questions arising from its conclusions. 展开更多
关键词 Rectal neuroendocrine neoplasm PROGNOSIS score Overall survival Pro-gression-free survival
下载PDF
Predicting post-hepatectomy liver failure using a nomogram based on portal vein width,inflammatory indices,and the albumin-bilirubin score
3
作者 Ke Sun Jiang-Bin Li +3 位作者 Ya-Feng Chen Zhong-Jie Zhai Lang Chen Rui Dong 《World Journal of Gastrointestinal Surgery》 2025年第2期87-96,共10页
BACKGROUND Post-hepatectomy liver failure(PHLF)after liver resection is one of the main complications causing postoperative death in patients with hepatocellular carcinoma(HCC).It is crucial to help clinicians identif... BACKGROUND Post-hepatectomy liver failure(PHLF)after liver resection is one of the main complications causing postoperative death in patients with hepatocellular carcinoma(HCC).It is crucial to help clinicians identify potential high-risk PHLF patients as early as possible through preoperative evaluation.AIM To identify risk factors for PHLF and develop a prediction model.METHODS This study included 248 patients with HCC at The Second Affiliated Hospital of Air Force Medical University between January 2014 and December 2023;these patients were divided into a training group(n=164)and a validation group(n=84)via random sampling.The independent variables for the occurrence of PHLF were identified by univariate and multivariate analyses and visualized as nomograms.Ultimately,comparisons were made with traditional models via receiver operating characteristic(ROC)curves,calibration curves,and decision curve analysis(DCA).RESULTS In this study,portal vein width[odds ratio(OR)=1.603,95%CI:1.288-1.994,P≤0.001],the preoperative neutrophil-to-lymphocyte ratio(NLR)(OR=1.495,95%CI:1.126-1.984,P=0.005),and the albumin-bilirubin(ALBI)score(OR=8.868,95%CI:2.144-36.678,P=0.003)were independent risk factors for PHLF.A nomogram prediction model was developed using these factors.ROC and DCA analyses revealed that the predictive efficacy and clinical value of this model were better than those of traditional models.CONCLUSION A new Nomogram model for predicting PHLF in HCC patients was successfully established based on portal vein width,the NLR,and the ALBI score,which outperforms the traditional model. 展开更多
关键词 NOMOGRAM Hepatocellular carcinoma Post-hepatectomy liver failure Albumin-bilirubin score Portal vein width
下载PDF
Efficacy-cost analysis of endoscopic mucosal resection and cold snare polypectomy:A propensity score matching analysis
4
作者 Shi-Yi Zhang Ying-Chun Wang +2 位作者 Lei-Lei Liu Zhi-Heng Wang Xue-Mei Guan 《World Journal of Gastrointestinal Surgery》 2025年第2期77-86,共10页
BACKGROUND Although substantial evidence supports the advantages of cold snare polypectomy(CSP)in terms of polypectomy efficacy and reduced postoperative adverse events,few studies have examined the cost differences b... BACKGROUND Although substantial evidence supports the advantages of cold snare polypectomy(CSP)in terms of polypectomy efficacy and reduced postoperative adverse events,few studies have examined the cost differences between CSP and traditional endoscopic mucosal resection(EMR)for the treatment of intestinal polyps.AIM To compare the efficacy-cost of EMR and CSP in the treatment of intestinal polyps.METHODS A total of 100 patients with intestinal polyps were included in the retrospective data of our hospital from April 2022 to May 2023.According to the treatment methods,they were divided into EMR(n=46)group and CSP(n=54)group.The baseline data of the two groups were balanced by 1:1 propensity score matching(PSM),and the cost-effectiveness analysis was performed on the two groups after matching.The recurrence rate of the two groups of patients was followed up for 1 year,and they were divided into recurrence group and non-recurrence group according to whether they recurred.Multivariate logistic regression analysis was used to screen out the influencing factors affecting the recurrence of intestinal polyps after endoscopic resection.RESULTS Significant disparities were observed in the number of polyps and smoking background between the two groups before PSM(P<0.05).Following PSM,the number of polyps and smoking history were well balanced between the EMR and CSP groups.The direct cost incurred by the CSP group was markedly higher than that incurred by the EMR group.Concurrently,the cost-effectiveness ratio in the CSP group was substantially reduced when juxtaposed with that in the EMR group(P<0.05).Upon completion of the 1-year follow-up,the rate of recurrence after endoscopic intestinal polypectomy was 38.00%.Multivariate methods revealed that age≥60 years,male sex,number of polyps≥3,and pathological type of adenoma were risk factors for recurrence after endoscopic intestinal polypectomy(all P<0.05).CONCLUSION CSP was more cost-effective for the treatment of intestinal polyps.An age≥60 years,male sex,having a number of polyps≥3,and pathological type of adenoma are independent influencing factors for recurrence. 展开更多
关键词 Propensity score matching method Endoscopic mucosal resection Cold snare polypectomy Intestinal polyps Curative effect Cost analysis
下载PDF
Laparoscopic hepatectomy using indocyanine green attenuates postoperative inflammatory response for hepatocellular carcinoma:A propensity score matching analysis
5
作者 Wei-Xun Wu Ming-Bin Huang +3 位作者 Mei-Xia Wang Li-Hua Chen Bo Hu Zhen-Bin Ding 《World Journal of Gastrointestinal Surgery》 2025年第1期193-202,共10页
BACKGROUND Improving the intraoperative and postoperative performance of laparoscopic hepatectomy was quite a challenge for liver surgeons.AIM To determine the benefits of indocyanine green(ICG)fluorescence imaging in... BACKGROUND Improving the intraoperative and postoperative performance of laparoscopic hepatectomy was quite a challenge for liver surgeons.AIM To determine the benefits of indocyanine green(ICG)fluorescence imaging in patients with hepatocellular carcinoma(HCC)who underwent laparoscopic hepatectomy during and after surgery.METHODS We retrospectively collected the clinicopathological data of 107 patients who successfully underwent laparoscopic hepatectomy at Zhongshan Hospital(Xiamen),Fudan University from June 2022 to June 2023.Whether using the ICG fluorescence imaging technique,we divided them into the ICG and non-ICG groups.To eliminate statistical bias,a 1:1 propensity score matching analysis was conducted.The comparison of perioperative outcomes,including inflammationrelated markers and progression-free survival,was analyzed statistically.RESULTS Intraoperatively,the ICG group exhibited lower blood loss,a shorter surgical time,lower hepatic inflow occlusion(HIO)frequency,and a shorter total HIO time.Postoperatively,the participation of ICG resulted in a shorter duration of hospitalization(6.5 vs 7.6 days,P=0.03)and postoperative inflammatory response attenuation(lower neutrophil-lymphocyte ratio on the first day after surgery and platelet-lymphocyte ratio on the third day,P<0.05).Although the differences were not significant,the levels of all inflammation-related markers were lower in the ICG group.The rates of postoperative complications and the survival analyses,including progression-free and overall survivals showed no significant difference between the groups.CONCLUSION The involvement of ICG fluorescence imaging may lead to improved perioperative outcomes,especially postoperative inflammatory response attenuation,and ultimately improve HCC patients’recovery after surgery. 展开更多
关键词 Hepatocellular carcinoma Laparoscopic hepatectomy Indocyanine green fluorescence Postoperative inflammatory response attenuation Propensity score matching analysis
下载PDF
DWI-ASPECTS评分与急性缺血性脑卒中侧支循环建立及介入治疗预后的相关性
6
作者 赵月飞 范英超 叶红莲 《中国实用神经疾病杂志》 2024年第12期1573-1578,共6页
目的观察弥散加权成像-阿尔伯塔卒中项目早期CT(DWI-ASPECTS)评分与急性缺血性脑卒中(AIS)侧支循环建立及介入治疗预后的相关性。方法回顾性选取2020-01—2023-06丹东市中心医院收治的94例AIS患者临床资料,根据区域软脑膜侧支循环评分(r... 目的观察弥散加权成像-阿尔伯塔卒中项目早期CT(DWI-ASPECTS)评分与急性缺血性脑卒中(AIS)侧支循环建立及介入治疗预后的相关性。方法回顾性选取2020-01—2023-06丹东市中心医院收治的94例AIS患者临床资料,根据区域软脑膜侧支循环评分(rLMC)分为侧支循环好组与侧支循环差组,比较2组DWI-ASPECTS评分与梗死区域情况,于介入治疗3个月后采用改良Rankin量表(m RS)评分将患者分为预后良好组与预后不良组,比较2组基线资料,并采用受试者工作特征(ROC)曲线分析DWI-ASPECTS评分对预后的预测价值。结果侧支循环好组DWI-ASPECTS评分高于侧支循环差组,NIHSS评分低于侧支循环差组(P<0.05)。Pearson相关性分析显示,r LMC评分与DWI-ASPECTS评分呈正相关(r=0.612),与NIHSS评分呈负相关(r=-0.529,P<0.05)。侧支循环差组患者梗死累及DWI-ASPECTS中I区、M1~M4的比例高于侧支循环好组(P<0.05)。多因素Logistic回归分析显示,年龄、NIHSS评分及DWI-ASPECTS评分是AIS患者预后的独立影响因素(P<0.05)。ROC曲线显示,年龄预测AIS患者预后的最佳截断值为63.50岁,NIHSS评分最佳截断值为11.50分,DWI-ASPECTS评分最佳截断值为7.50分,且DWI-ASPECTS评分预测AIS患者预后的AUC及特异性均高于年龄与NIHSS评分(P<0.05)。结论DWI-ASPECTS评分与AIS患者侧支循环情况密切相关,同时DWI-ASPECTS评分、年龄及NIHSS评分为AIS患者介入治疗预后的独立影响因素,其中DWI-ASPECTS评分对预后具有较高的预测价值,可作为AIS患者介入治疗预后转归的主要预测指标。 展开更多
关键词 急性缺血性脑卒中 弥散加权成像-阿尔伯塔卒中项目早期CT评分 侧支循环 介入治疗 预后 影响因素 预测指标
下载PDF
DWI-ASPECTS预测急性期大脑中动脉供血区梗死静脉溶栓患者侧支循环代偿的价值 被引量:18
7
作者 孟媛媛 吴德云 +1 位作者 刘迎春 陈晓辉 《实用医学杂志》 CAS 北大核心 2018年第6期912-916,共5页
目的评价弥散加权成像Alberta早期CT评分(DWI-ASPECTS)对大脑中动脉狭窄或闭塞的脑卒中静脉溶栓患者侧支循环建立的预测价值。方法收集影像学证实为大脑中动脉重度狭窄或闭塞的缺血性脑卒中患者178例,给予rt-PA静脉溶栓。采集患者临床... 目的评价弥散加权成像Alberta早期CT评分(DWI-ASPECTS)对大脑中动脉狭窄或闭塞的脑卒中静脉溶栓患者侧支循环建立的预测价值。方法收集影像学证实为大脑中动脉重度狭窄或闭塞的缺血性脑卒中患者178例,给予rt-PA静脉溶栓。采集患者临床基线数据。采用NIHSS评分、m RS评分和DWI-ASPECT评分。通过头颈CTA评估软脑膜侧支循环。结果侧支循环代偿较好组三酰甘油、DWI-ASPECT评分明显高于侧支循环代偿较差组(P<0.05)。而侧支循环代偿较好组高血压患病率、溶栓前后NIHSS评分、m RS评分明显低于侧支循环代偿较差组(P<0.05)。与侧支循环代偿较好组相比,侧支循环代偿较差组梗死常累及DWI-ASPECTS中的M1~M4、M6和岛叶区域,且差异有统计学意义(P<0.05)。DWI-ASPECTS预测软脑膜侧支循环建立的ROC曲线下面积为0.932,截点为7.50,敏感度为81%,特异度为94.1%。结论软脑膜侧支循环能充分保障脑皮质及皮质下区域(M1~M4、M6和岛叶)血供,DWI-AS-PECTS可有效预测急性大脑中动脉供血区脑梗死患者侧支循环代偿。 展开更多
关键词 卒中 静脉溶栓 大脑中动脉 侧支循环 dwi-aspect评分
下载PDF
NIHSS/DWI-ASPECTS不匹配预测大脑中动脉供血区脑梗死早期神经功能恶化 被引量:13
8
作者 方传勤 王娟娟 +3 位作者 杜艳群 戴鸣 朱人定 何晓璐 《中风与神经疾病杂志》 CAS 2019年第7期628-631,共4页
目的 探究NIHSS/DWI-ASPECTS不匹配对大脑中动脉供血区脑梗死早期神经功能恶化的预测价值。方法 回顾性收集2017年3月~2018年5月因大脑中动脉供血区脑梗死在安徽医科大学第二附属医院神经内科住院的患者。收集其临床资料,根据入院时和住... 目的 探究NIHSS/DWI-ASPECTS不匹配对大脑中动脉供血区脑梗死早期神经功能恶化的预测价值。方法 回顾性收集2017年3月~2018年5月因大脑中动脉供血区脑梗死在安徽医科大学第二附属医院神经内科住院的患者。收集其临床资料,根据入院时和住院72 h NIHSS评分,评估早期神经功能恶化(early neurological deterioration,END),将患者分为END组和非END组。所有患者在入院48 h内完成头部MRI检查,并行DWI-Alberta 卒中项目早期CT评分(DWI-ASPECTS),NIHSS/DWI-ASPECTS不匹配(NIHSS/DWI-ASPECTS Mismatch,NDM)定义为 NIHSS评分≥8且DWI-ASPECTS≥8,应用多变量Logistic回归分析NDM与大脑中动脉供血区脑梗死END的相关性。结果 共收集94例大脑中动脉供血区脑梗死患者,男性52例(55.3%),年龄(65.4±11.0)岁。符合END患者31例(33%)。NIHSS/DWI-ASPECTS不匹配(NDM)病例18例(19.1%),其中END组14例(45%),非END组4例(6.5%)。END组年龄大、NIHSS高、DWI-ASPECTS低、NDM患者比例显著高于非END组( P ≤0.05或 P ≤0.01)。多变量Logistic回归分析显示,在校正混杂因素后,DWI-ASPECTS(优势比0.637,95%置信区间0.409~0.994, P =0.047)和NDM(优势比13.175,95%置信区间1.539~112.824, P =0.019)是大脑中动脉供血区脑梗死END的预测因素。结论 NIHSS/DWI-ASPECTS不匹配对大脑中动脉供血区脑梗死早期神经功能恶化具有一定的预测价值。 展开更多
关键词 NIHSS/dwi-aspects不匹配 DWI-Alberta卒中项目早期CT评分 脑梗死 早期神经功能恶化 预测价值
下载PDF
DWI-ASPECTS对大脑中动脉供血区急性脑梗死患者早期神经功能恶化的预测价值 被引量:9
9
作者 陈妙玲 梁满球 +5 位作者 邹玉坚 袁灼彬 刘勇林 黄翔 王芳 范宪淼 《放射学实践》 CSCD 北大核心 2022年第7期813-817,共5页
目的:探讨扩散加权成像阿尔伯塔卒中项目早期CT评分(DWI-ASPECTS)对大脑中动脉(MCA)供血区急性脑梗死患者发生早期神经功能恶化(END)的预测价值。方法:回顾性分析本院神经内科收治的93例MCA供血区急性脑梗死患者病例资料,根据是否发生EN... 目的:探讨扩散加权成像阿尔伯塔卒中项目早期CT评分(DWI-ASPECTS)对大脑中动脉(MCA)供血区急性脑梗死患者发生早期神经功能恶化(END)的预测价值。方法:回顾性分析本院神经内科收治的93例MCA供血区急性脑梗死患者病例资料,根据是否发生END分为非END组和END组,对两组患者的临床和影像数据行差异与回归分析,采用受试者操作特征(ROC)曲线评价DWI-ASPECTS对MCA供血区急性脑梗死患者END的预测价值。结果:93例患者中,发生END者27例(END组),非END组66例。两组比较,END组的DWI-ASPECTS、血管狭窄部位、入院NIHSS评分、入院空腹血糖、糖尿病史与非END组的差异有统计学意义(P<0.05)。二元Logistic回归分析显示,DWI-ASPECTS与END风险相关,差异具有统计学意义(OR=0.736,95%CI:0.564~0.961,P=0.024)。ROC曲线分析显示当DWI-ASPECTS≤4时,DWI-ASPECTS对预测MCA供血区急性脑梗死患者END的敏感度为74.07%,特异度为69.70%,曲线下面积(AUC)为0.745(95%CI:0.644~0.829)。结论:DWI-ASPECTS对大脑中动脉供血区急性脑梗死患者END的发生有一定的预测价值。 展开更多
关键词 脑梗死 扩散加权成像 疾病严重程度指数 早期神经功能恶化 阿尔伯塔卒中项目早期CT评分
下载PDF
大脑中动脉M1段闭塞后侧支循环状态与DWI-ASPECTS相关性研究 被引量:2
10
作者 满术千 李旭丹 +1 位作者 梁峰 邹建勋 《影像诊断与介入放射学》 2023年第4期268-272,共5页
目的探索大脑中动脉M1段闭塞后侧支循环状态与基于扩散加权成像(DWI)的Alberta卒中项目早期CT评分(DWI-ASPECTS)的相关性。方法回顾性分析52例大脑中动脉M1段闭塞患者临床及影像资料。侧支循环评估包括大脑前/后动脉偏侧优势(ACAL/PCAL... 目的探索大脑中动脉M1段闭塞后侧支循环状态与基于扩散加权成像(DWI)的Alberta卒中项目早期CT评分(DWI-ASPECTS)的相关性。方法回顾性分析52例大脑中动脉M1段闭塞患者临床及影像资料。侧支循环评估包括大脑前/后动脉偏侧优势(ACAL/PCAL)征象及T2-FLAIR高信号血管征(HVS)。使用DWI-ASPECTS进行定量分析脑梗死严重程度。结果52例患者中,ACAL阳性17例(32.7%),PCAL阳性18例(34.6%),HVS显著22例(42.3%),平均DWI-ASPECTS(5±2)分。ACAL与PCAL、ACAL与HVS显著、PCAL与HVS显著分别存在相关性,P值分别为P<0.001、P=0.004、P=0.010,Spearman相关系数分别为r=0.699、0.399、0.359。是否存在ACAL/PCAL征象,组间DWI-ASPECTS无统计学差异(P>0.05)。是否存在HVS显著,组间DWI-ASPECTS差异具有统计学意义(P=0.001),Spearman相关系数为r=0.415。结论大脑中动脉M1段闭塞患者通过观察常规磁共振检查序列评估ACAL、PCAL与HVS可反映侧支循环状态,有助于脑梗死程度评估。 展开更多
关键词 侧支循环 高信号血管征 大脑前动脉偏侧优势征象 大脑后动脉偏侧优势征象 扩散加权成像 Alberta卒中项目早期CT评分
下载PDF
MRA/DWI-ASPECTS不匹配对急性脑梗死未接受再灌注治疗患者早期神经功能恶化的预测价值 被引量:8
11
作者 何晓璐 朱人定 +2 位作者 戴鸣 杜艳群 方传勤 《山东医药》 CAS 2020年第29期67-69,共3页
目的探讨磁共振血管造影(MRA)/磁共振弥散加权成像(DWI)-Alberta卒中计划早期计算机断层扫描评分(ASPECTS)不匹配对未接受再灌注治疗的急性脑梗死(ACI)患者早期神经功能恶化(END)的预测价值。方法收集103例因各种原因未接受再灌注治疗... 目的探讨磁共振血管造影(MRA)/磁共振弥散加权成像(DWI)-Alberta卒中计划早期计算机断层扫描评分(ASPECTS)不匹配对未接受再灌注治疗的急性脑梗死(ACI)患者早期神经功能恶化(END)的预测价值。方法收集103例因各种原因未接受再灌注治疗的首发ACI患者,其中发病72 h内发生END 17例(END组)、未发生END 86例(非END组);均在发病24 h内行头颅MRA检测及DWI-ASPECTS,判断MRA/DWI-ASPECTS不匹配情况,采用多因素Logistic回归分析MRA/DWI-ASPECTS不匹配预测END的价值。结果END组存在MRA/DWI-ASPECTS不匹配10例(58.82%),非END组存在MRA/DWI-ASPECTS不匹配24例(27.91%),END组存在MRA/DWI-ASPECTS不匹配比例高于非END组(P=0.013)。多因素Logistic回归分析调整混杂因素后显示,MRA/DWI-ASPECTS不匹配仍是END发生的独立预测因子(OR=16.03,95%CI 2.75~93.62;P=0.002)。结论MRA/DWI-ASPECTS不匹配对ACI未接受再灌注治疗患者END的发生具有一定预测价值。 展开更多
关键词 MRA/dwi-aspects不匹配 磁共振成像技术 急性脑梗死 早期神经功能恶化
下载PDF
基于Z-Score动态压缩的高效联邦学习算法
12
作者 刘乔寿 皮胜文 原炜锡 《计算机应用研究》 CSCD 北大核心 2024年第7期2093-2097,共5页
联邦学习作为一种具有隐私保护的新兴分布式计算范式,在一定程度上保护了用户隐私和数据安全。然而,由于联邦学习系统中客户端与服务器需要频繁地交换模型参数,造成了较大的通信开销。在带宽有限的无线通信场景中,这成为了限制联邦学习... 联邦学习作为一种具有隐私保护的新兴分布式计算范式,在一定程度上保护了用户隐私和数据安全。然而,由于联邦学习系统中客户端与服务器需要频繁地交换模型参数,造成了较大的通信开销。在带宽有限的无线通信场景中,这成为了限制联邦学习发展的主要瓶颈。针对这一问题,提出了一种基于Z-Score的动态稀疏压缩算法。通过引入Z-Score,对局部模型更新进行离群点检测,将重要的更新值视为离群点,从而将其挑选出来。在不需要复杂的排序算法以及原始模型更新的先验知识的情况下,实现模型更新的稀疏化。同时随着通信轮次的增加,根据全局模型的损失值动态地调整稀疏率,从而在保证模型精度的前提下最大程度地减少总通信量。通过实验证明,在I.I.D.数据场景下,该算法与联邦平均(FedAvg)算法相比可以降低95%的通信量,精度损失仅仅为1.6%,与FTTQ算法相比可以降低40%~50%的通信量,精度损失仅为1.29%,证明了该方法在保证模型性能的同时显著降低了通信成本。 展开更多
关键词 联邦学习 Z-score 稀疏化 动态稀疏率
下载PDF
基于F-score和二进制灰狼优化的肿瘤基因选择方法
13
作者 穆晓霞 郑李婧 《南京师大学报(自然科学版)》 CAS 北大核心 2024年第1期111-120,共10页
针对肿瘤基因数据维度高、噪声多、冗余性高的现状,结合Spearman相关系数改进F-score算法,在此基础上优化二进制灰狼算法,提出了一种基于改进F-score和二进制灰狼算法的肿瘤基因选择算法.首先,考虑特征之间的相关性,计算每个特征的F-sc... 针对肿瘤基因数据维度高、噪声多、冗余性高的现状,结合Spearman相关系数改进F-score算法,在此基础上优化二进制灰狼算法,提出了一种基于改进F-score和二进制灰狼算法的肿瘤基因选择算法.首先,考虑特征之间的相关性,计算每个特征的F-score值和特征之间的Spearman相关系数的绝对值;然后,计算权重系数得出各个特征的权重值,依据重要性进行排序,选出初选特征子集;最后,通过收敛因子的衰减曲线和初始化方法优化二进制灰狼算法,调整全局搜索和局部搜索所占比例,增强全局搜索能力并提高局部搜索速度,有效节省时间开销,提升特征选择的分类性能和效率,得到最优特征子集.在9个肿瘤基因数据集上测试所提算法,在分类准确率和筛选特征数目两个指标上进行仿真实验,并与4种其他算法进行对比,实验结果证明所提算法表现良好,可有效降低基因数据维度,并具有较好的分类精度. 展开更多
关键词 肿瘤基因 Fisher-score Spearman 相关系数 二进制灰狼优化算法 特征选择
下载PDF
引入ESG框架的Z-Score业绩评价模式研究
14
作者 柯剑 曾锦晴 《管理会计研究》 2024年第6期79-88,共10页
本文结合当前企业可持续高质量发展的目标导向,构建了引入ESG框架的Z-Score业绩评价模式,以弥补EVA评价中过于关注经济利润以及BSC评价中过于关注企业内部治理的视角局限性。通过主成分分析法测度的关键综合业绩指标,在案例分析中证明... 本文结合当前企业可持续高质量发展的目标导向,构建了引入ESG框架的Z-Score业绩评价模式,以弥补EVA评价中过于关注经济利润以及BSC评价中过于关注企业内部治理的视角局限性。通过主成分分析法测度的关键综合业绩指标,在案例分析中证明了引入ESG框架后的业绩评价模式在实际应用中具有必要性和合理性。在传统业绩指标评价模式的基础上引入ESG框架来进一步优化企业业绩评价体系,有助于企业培育或强化适应高质量发展的业绩观。 展开更多
关键词 ESG 业绩评价 BSC EVA Z-score
下载PDF
DWI-ASPECTS评分联合血清抗心磷脂抗体对急性脑梗死患者rt-PA静脉溶栓预后的评估 被引量:6
15
作者 孟会红 邢晓明 +6 位作者 张超 赵静 孙庆娜 刘永刚 任翠剑 郭亚平 钱倩 《中国实用神经疾病杂志》 2022年第4期465-470,共6页
目的探讨弥散加权成像阿尔伯塔卒中项目早期计算机断层扫描评分(DWI-ASPECTS)联合血清抗心磷脂抗体(ACA)对急性脑梗死(ACI)患者重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓治疗预后的评估价值。方法选取2018-06—2020-12保定市第一中心医... 目的探讨弥散加权成像阿尔伯塔卒中项目早期计算机断层扫描评分(DWI-ASPECTS)联合血清抗心磷脂抗体(ACA)对急性脑梗死(ACI)患者重组组织型纤溶酶原激活剂(rt-PA)静脉溶栓治疗预后的评估价值。方法选取2018-06—2020-12保定市第一中心医院收治的151例ACI患者,根据神经缺损严重程度分为轻度缺损组(n=45)、中度缺损组(n=71)、重度缺损组(n=35)。根据rt-PA静脉溶栓治疗预后情况分为预后不良组(n=61)、预后良好组(n=90)。收集患者基线资料,计算DWI-ASPECTS评分,化学发光法检测血清ACA水平。Spearman相关系数分析美国国立卫生研究院卒中量表(NIHSS)评分与DWI-ASPECTS评分和血清ACA水平的相关性。多因素Logistic回归分析ACI患者rt-PA静脉溶栓治疗预后不良影响因素。接收者操作特征(ROC)曲线分析DWI-ASPECTS评分和血清ACA水平对ACI患者rt-PA静脉溶栓治疗预后不良的评估价值。结果轻度、中度、重度缺损组DWI-ASPECTS评分依次降低,血清ACA水平依次升高(P<0.05)。ACI患者NIHSS评分与DWI-ASPECTS评分呈负相关,与血清ACA水平呈正相关(r=—0.652、0.584,P均<0.001)。与预后不良组比较,预后良好组年龄增大,糖尿病比例、NIHSS评分、低密度脂蛋白胆固醇(LDL-C)、ACA水平升高,血尿酸、高密度脂蛋白胆固醇(HDL-C)、DWI-ASPECTS评分降低(P<0.05)。NIHSS评分(OR=1.179,95%CI:1.061~1.311,P=0.002)、LDL-C(OR=1.157,95%CI:1.059~1.264,P=0.002)、ACA(OR=1.794,95%CI:1.299~2.476,P<0.001)为ACI患者rt-PA静脉溶栓治疗预后不良独立危险因素,DWI-ASPECTS评分(OR=0.560,95%CI:0.411~0.764,P<0.001)为独立保护因素。DWI-ASPECTS评分、ACA水平、二者联合评估ACI患者rt-PA静脉溶栓治疗预后不良的曲线下面积(AUC)分别为0.866、0.792、0.934,敏感度分别为91.80%、72.13%、83.61%,特异度分别为61.11%、76.67%、90.00%。DWI-ASPECTS评分和血清ACA水平评估ACI患者rt-PA静脉溶栓治疗预后不良的AUC大于单独评估(P<0.05)。结论DWI-ASPECTS评分降低、血清ACA水平升高与ACI患者病情严重程度和rt-PA静脉溶栓治疗预后不良相关,二者联合评估rt-PA静脉溶栓治疗预后不良价值较高。 展开更多
关键词 急性脑梗死 重组组织型纤溶酶原激活剂 静脉溶栓 预后 弥散加权成像阿尔伯塔卒中项目早期计算机断层扫描评分 抗心磷脂抗体
下载PDF
中医药团体标准评价体系(SCORE-TCM)解读 被引量:1
16
作者 宗星煜 王丁熠 +15 位作者 王丽颖 赵学尧 林甲昊 刘斌 虞雪云 郭旸 梁宁 车前子 蒋寅 张海力 龚照元 李安 王巍力 李慧珍 史楠楠 王燕平 《中国中医基础医学杂志》 CAS CSCD 2024年第4期622-626,共5页
本文全面解读了中医药团体标准评价体系(System of Consortium Standards Rating and Evaluation of Traditional Chinese Medicine,SCORE-TCM)。SCORE-TCM是结合定性与定量评价,全面评估中医药团体标准在制定主体、文本编写、技术内容... 本文全面解读了中医药团体标准评价体系(System of Consortium Standards Rating and Evaluation of Traditional Chinese Medicine,SCORE-TCM)。SCORE-TCM是结合定性与定量评价,全面评估中医药团体标准在制定主体、文本编写、技术内容、推广应用和实施效益等几方面特征的综合评价工具。文中详述了SCORE-TCM的构建目的、定义和构建过程,解释了评价指标体系中的各项指标,并对每项指标的评价材料进行介绍。本文旨在帮助中医药团体标准的制定者、第三方评价机构和其他相关方更好地理解SCORE-TCM各评价条目的含义,更有效地运用于中医药团体标准的自评价或第三方评价,SCORE-TCM将为《中医药团体标准管理办法》的贯彻实施,以及中医药团体标准的高质量发展提供技术支持。 展开更多
关键词 中医药 团体标准 score-TCM 评价工具 解读
下载PDF
Gustave Roussy Immune Score——结直肠癌患者的新型预后评分 被引量:1
17
作者 韦珊珊 胡文蔚 耿一婷 《临床肿瘤学杂志》 CAS 2024年第1期43-49,共7页
目的探讨Gustave Roussy Immune Score(GRIm评分)在结直肠癌(CRC)根治术后患者预后评估中的价值。方法本研究共纳入2004年6月至2019年8月271例CRC根治术后患者。分析GRIm评分与CRC临床病理特征的关系。采用Kaplan-Meier法绘制CRC患者无... 目的探讨Gustave Roussy Immune Score(GRIm评分)在结直肠癌(CRC)根治术后患者预后评估中的价值。方法本研究共纳入2004年6月至2019年8月271例CRC根治术后患者。分析GRIm评分与CRC临床病理特征的关系。采用Kaplan-Meier法绘制CRC患者无病生存时间(DFS)曲线,生存差异行Log-rank检验;Cox风险比例回归模型分析影响CRC患者预后的因素;校准曲线和受试者工作特征(ROC)曲线检验基于GRIm评分的列线图的预测效能。结果GRIm评分与性别、肿瘤部位、神经侵犯、N分期、美国癌症联合委员会(AJCC)分期、白蛋白(ALB)评分和乳酸脱氢酶(LDH)评分有关(P<0.05);GRIm简化评分与肿瘤部位、肿瘤直径、癌栓、ALB评分和LDH评分有关(P<0.05)。Cox风险比例回归模型显示,GRIm评分是影响CRC患者DFS的独立因素(HR=2.546,95%CI:1.644~3.943,P<0.05)。包括GRIm评分的列线图对CRC患者DFS的预测能力优于第8版AJCC分期系统。结论GRIm评分是影响CRC患者DFS的独立因素,基于GRIm评分的列线图可以帮助临床医师有效评估CRC患者的预后,制定个体化治疗方案。 展开更多
关键词 结直肠癌 GRIm评分 列线图 预后
下载PDF
基于中心偏移的Fisher score与直觉邻域模糊熵的多标记特征选择 被引量:1
18
作者 孙林 马天娇 《计算机科学》 CSCD 北大核心 2024年第7期96-107,共12页
现有多标记Fisher score模型中边缘样本会影响算法分类效果。鉴于邻域直觉模糊熵处理不确定信息时具有更强的表达能力与分辨能力的优势,文中提出了一种基于中心偏移的Fisher score与邻域直觉模糊熵的多标记特征选择方法。首先,根据标记... 现有多标记Fisher score模型中边缘样本会影响算法分类效果。鉴于邻域直觉模糊熵处理不确定信息时具有更强的表达能力与分辨能力的优势,文中提出了一种基于中心偏移的Fisher score与邻域直觉模糊熵的多标记特征选择方法。首先,根据标记将多标记论域划分为多个样本集,计算样本集的特征均值作为标记下样本的原始中心点,以最远样本的距离乘以距离系数,去除边缘样本集,定义了新的有效样本集,计算中心偏移处理后的标记下每个特征的得分以及标记集的特征得分,进而建立了基于中心偏移的多标记Fisher score模型,预处理多标记数据。然后,引入多标记分类间隔作为自适应模糊邻域半径参数,定义了模糊邻域相似关系和模糊邻域粒,由此构造了多标记模糊邻域粗糙集的上、下近似集;在此基础上提出了多标记邻域粗糙直觉隶属度函数和非隶属度函数,定义了多标记邻域直觉模糊熵。最后,给出了特征的外部和内部重要度的计算公式,设计了基于邻域直觉模糊熵的多标记特征选择算法,筛选出最优特征子集。在多标记K近邻分类器下、9个多标记数据集上的实验结果表明,所提算法选择的最优子集具有良好的分类性能。 展开更多
关键词 多标记学习 特征选择 Fisher score 多标记模糊邻域粗糙集 邻域直觉模糊熵
下载PDF
Role of albumin-bilirubin score in non-malignant liver disease 被引量:2
19
作者 Shi-Xue Xu Fan Yang +2 位作者 Nan Ge Jin-Tao Guo Si-Yu Sun 《World Journal of Gastroenterology》 SCIE CAS 2024年第9期999-1004,共6页
The albumin-bilirubin(ALBI)score,which was proposed to assess the prognosis of patients with hepatocellular carcinoma,has gradually been extended to other liver diseases in recent years,including primary biliary chola... The albumin-bilirubin(ALBI)score,which was proposed to assess the prognosis of patients with hepatocellular carcinoma,has gradually been extended to other liver diseases in recent years,including primary biliary cholangitis,liver cirrhosis,hepatitis,liver transplantation,and liver injury.The ALBI score is often compared with classical scores such as the Child-Pugh and model for end-stage liver disease scores or other noninvasive prediction models.It is widely employed because of its immunity to subjective evaluation indicators and ease of obtaining detection indicators.An increasing number of studies have confirmed that it is highly accurate for assessing the prognosis of patients with chronic liver disease;additionally,it has demonstrated good predictive performance for outcomes beyond survival in patients with liver diseases,such as decompensation events.This article presents a review of the application of ALBI scores in various non-malignant liver diseases. 展开更多
关键词 Albumin-bilirubin score Liver cirrhosis Primary biliary cholangitis Hepatitis Liver transplantation Liver injury
下载PDF
DWI-ASPECTS评分与前循环急性缺血性卒中患者机械取栓术后转归的相关性分析 被引量:9
20
作者 江涛 闫莉莉 +2 位作者 陈名宇 沈雁婕 任振华 《中风与神经疾病杂志》 CAS 2020年第9期834-839,共6页
目的探讨DWI-ASPECTS评分对前循环急性缺血性卒中患者Solitaire AB支架取栓术的预后价值。方法回顾性分析我科2014年1月~2018年3月就治的17例前循环急性缺血性卒中患者的临床资料。收集患者一般临床资料,以及DWI-ASPECTS评分、入院NIHS... 目的探讨DWI-ASPECTS评分对前循环急性缺血性卒中患者Solitaire AB支架取栓术的预后价值。方法回顾性分析我科2014年1月~2018年3月就治的17例前循环急性缺血性卒中患者的临床资料。收集患者一般临床资料,以及DWI-ASPECTS评分、入院NIHSS评分、出院NIHSS评分、出院mRS评分、出院GOS评分、有无症状性颅内出血、有无放射冠等资料。3 m后,mRS评分、FAQ评分和GOS评分。根据DWI-ASPECTS评分,分成≥7分组,<7分组;mRS评分≤2分定义为预后良好,mRS评分>2分为预后不良。研究DWI-ASPECT评分及其他可能影响临床预后的因素。结果共17例患者行机械取栓术,术前DWI-ASPECTS评分≥7分9例,评分<7分8例。评分≥7分9例患者中,术后mRS评分≤2分8例,预后良好,仅1例患者评分为>2分;而评分<7分8例,仅1例患者mRS评分≤2分;两组之间差别明显(P<0.001)。另一方面,良好预后组9例患者,入院时DWI-ASPECTS评分8例超过7分,仅1例患者评分为6分;而不良预后组8例患者中,仅有一例患者评分为7分,两组之间差别明显(P<0.001)。结论DWI-ASPECTS评分可以作为前循环急性缺血性卒中患者术前评估的指标。评分≥7分的患者Solitaire AB支架取栓术预后良好。 展开更多
关键词 急性缺血性卒中 DWI-SPECTS评分 机械取栓术 预后
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部