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基于下采样的局部判别矩阵型分类的心衰死亡率预测 被引量:2
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作者 陈钊志 李冬冬 +2 位作者 王喆 阮彤 高炬 《华东理工大学学报(自然科学版)》 CAS CSCD 北大核心 2019年第1期156-162,共7页
不平衡分类问题的特征是样本集中每类样本个数相差较大,导致分类结果偏向多数类样本,少数类样本被忽视。而在不平衡分类问题中,少数类样本需要更多的关注。本文基于上海曙光医院提供的心衰医疗数据,提出了一个针对心衰病人死亡率预测的... 不平衡分类问题的特征是样本集中每类样本个数相差较大,导致分类结果偏向多数类样本,少数类样本被忽视。而在不平衡分类问题中,少数类样本需要更多的关注。本文基于上海曙光医院提供的心衰医疗数据,提出了一个针对心衰病人死亡率预测的框架,为心衰的辅助治疗和诊断提供有效的信息。心衰医疗病例属于典型的不平衡分类问题,心衰病人在总的病人数量中只占少数,在检查中,应尽可能重点关注心衰病例。本文提出的框架采用下采样方法调整样本的比例,使类与类之间的规模平衡;使用主成分分析方法对高维数据进行特征选择;并在采样后的数据集上训练局部敏感判别矩阵型分类器,提高局部样本的关注度以获得更好的分类性能。实验结果表明,该框架能对心衰医疗数据提供较好的预测结果,与同类算法比较,表现出了更好的性能,是一个有效且实用的方法。 展开更多
关键词 机器学习 分类器 心衰死亡率预测 医疗辅助系统
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基于AB-CNN-BiLSTM心衰死亡率预测模型 被引量:8
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作者 郭汉 帅仁俊 +1 位作者 马力 李文煜 《计算机应用与软件》 北大核心 2021年第4期37-42,共6页
为了更有效地分配医疗资源并辅助医生诊疗,需要对ICU患者的死亡率做出更快、更准确的预测,提出一种融合注意力机制的CNN-BiLSTM ICU患者心衰死亡率预测模型。对MIMICIII数据集提供的入院48小时的数据进行一系列预处理操作;通过卷积神经... 为了更有效地分配医疗资源并辅助医生诊疗,需要对ICU患者的死亡率做出更快、更准确的预测,提出一种融合注意力机制的CNN-BiLSTM ICU患者心衰死亡率预测模型。对MIMICIII数据集提供的入院48小时的数据进行一系列预处理操作;通过卷积神经网络模型(CNN)及双向长短期记忆神经网络模型(BiLSTM)考虑不同参数之间的空间联系,同时关注数据时间维度上的变化;引入注意力机制赋予特征权重。实验表明,该预测模型能够有效地对ICU患者心衰死亡率进行预测,提高死亡率预测的准确性。 展开更多
关键词 心衰死亡率 数据预处 卷积神经网络 双向长短期记忆神经网络模型 注意力机制
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从中西医结合角度探讨心力衰竭在院死亡风险预测模型的构建 被引量:2
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作者 杨祎 李峥 +3 位作者 杜毅 英哲铭 杨关林 张哲 《中华中医药学刊》 CAS 北大核心 2022年第11期87-90,共4页
早期识别在院死亡风险高的心力衰竭(心衰)患者,通过应用更加积极的药物或手术等方式,可有效降低心衰患者死亡率,对提高医疗质量和医疗水平具有重要意义,亦符合疾病防治重心前移的要求。总结了心衰患者在院死亡相关的潜在危险因素和预测... 早期识别在院死亡风险高的心力衰竭(心衰)患者,通过应用更加积极的药物或手术等方式,可有效降低心衰患者死亡率,对提高医疗质量和医疗水平具有重要意义,亦符合疾病防治重心前移的要求。总结了心衰患者在院死亡相关的潜在危险因素和预测因子,梳理此模型的研究现状,依据古籍条文探讨中医因素(症状、体征、节气、五运六气)对于提升模型预测能力的重要性,并对比分析传统统计分析和人工智能方法构建此模型的优劣性,为心衰在院死亡中西医结合预测模型研究提供前期理论及方法学基础。 展开更多
关键词 在院死亡率 预测模型 中西医结合
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Differences in the predictive value of red cell distribution width for the mortality of patients with heart failure due to various heart diseases 被引量:10
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作者 Yang ZHANG Yan WANG +4 位作者 Jin-Suo KANG Jin-Xing YU Shi-Jie YIN Xiang-Feng CONG Xi CHEN 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2015年第6期647-654,共8页
Background Increased red blood cell distribution width (RDW) is associated with adverse outcomes in patients with heart failure (HF). The objective of this study was to compare the differences in the predictive va... Background Increased red blood cell distribution width (RDW) is associated with adverse outcomes in patients with heart failure (HF). The objective of this study was to compare the differences in the predictive value of RDW in patients with HF due to different causes. Methods We retrospectively investigated 1,021 HF patients from October 2009 to December 2011 at Fuwai Hospital (Beijing, China). HF in these patients was caused by three diseases; coronary heart disease (CHD), dilated cardiomyopathy (DCM) and valvular heart disease (VHD). Patients were followed-up for 21 ~ 9 months. Results The RDW, mortality and survival duration were significantly different among the three groups. Kaplan-Meier analysis showed that the cumulative survival decreased significantly with increased RDW in patients with HF caused by CHD and DCM, but not in those with HF patients caused by VHD. In a multivariable model, RDW was identified as an independent predictor for the mortality of HF patients with CHD (P 〈 0.001, HR 1.315, 95% CI 1.122-1.543). The group with higher N-terminal pro-brain natriuretic peptide (NT-proBNP) and higher RDW than median had the lowest cumulative survival in patients with HF due to CHD, but not in patients with HF due to DCM. Conclusions RDW is a prognostic indicator for patients with HF caused by CHD and DCM; thus, RDW adds important information to NT-proBNP in CHD caused HF patients. 展开更多
关键词 Coronary heart disease Dilated cardiomyopathy Heart failure Red blood cell distribution width Valvular heart disease
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Effects of a nurse-led heart failure clinic on hospital readmission and mortality in Hong Kong 被引量:6
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作者 Ho Yu Cheng Sek Ying Chair +3 位作者 Qun Wang Janet WH Sit Eliza ML Wong Siu Wai Tang 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2016年第5期415-419,共5页
Background Heart failure (HF) is a physically and socially debilitating disease that carries the burden of hospital re-admission and mortality. As an aging society, Hong Kong urgently needs to find ways to reduce th... Background Heart failure (HF) is a physically and socially debilitating disease that carries the burden of hospital re-admission and mortality. As an aging society, Hong Kong urgently needs to find ways to reduce the hospital readmission of HF patients. This study evaluates the effects of a nurse-led HF clinic on the hospital readmission and mortality rates among older HF patients in Hong Kong. Methods This study is a retrospective data analysis that compares HF patient in a nurse-led HF clinic in Hong Kong compared with HF patients who did not attend the clinic. The nurses of this clinic provide education on lifestyle modification and symptom monitoring, as well as titrate the medications and measure biochemical markers by following established protocols. This analysis used the socio-demographic and clinical data of HF patients who were aged 〉 65 years old and stayed in the clinic over a six-month period. Results The data of a total of 78 HF patients were included in this data analysis. The mean age of the patients was 77.38 ± 6.80 years. Approximately half of the HF patients were male (51.3%), almost half were smokers (46.2%), and the majority received 〈 six years of formal education. Most of the HF patients (87.2%) belonged to classes II and III of the New York Heart Association Functional Classification, with a mean ejection fraction of 47.15± 20.31 mL. The HF patients who attended the clinic (n = 38, 75.13 ± 5.89 years) were significantly younger than those who did not attend the clinic (n = 40, 79.53 ± 6.96 years) (P = 0.04), and had lower recorded blood pressure. No other statistically significant difference existed between the socio-demographic and clinical characteristics of the two groups. The HF patients who did not attend the nurse-led HF clinic demonstrated a significantly higher risk of hospital readmission [odd ratio (OR): 7.40; P 〈 0.01] than those who attended after adjusting for the effect of age and blood pressure. In addition, HF patients who attended the clinic had lower mortality (n = 4) than those who did not attend (n = 14). However, such a difference did not reach statistical significance when the effects of age and blood pressure were adjusted. A signifi- cant reduction in systolic blood pressure IF (2, 94) = 3.39, P = 0.04] and diastolic blood pressure [F (2, 94) = 8.48, P 〈 0.01] was observed among the HF patients who attended the clinic during the six-month period. Conclusions The finding of this study suggests the important role of nurse-led HF clinics in reducing healthcare burden and improving patient outcomes among HF patients in Hong Kong. 展开更多
关键词 Heart failure Hospital readmission MORTALITY Nurse-led clinic
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Global and Regional Trends and Projections of Infective Endocarditis-Associated Disease Burden and Attributable Risk Factors from 1990 to 2030 被引量:1
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作者 Lijin Lin Yemao Liu +10 位作者 Juanjuan Qin Fang Lei Wenxin Wang Xuewei Huang Weifang Liu Xingyuan Zhang Zhigang She Peng Zhang Xiaojing Zhang Zhaoxia Jin Hongliang Li 《Chinese Medical Sciences Journal》 CAS CSCD 2022年第3期181-194,I0003,共15页
Objective To forecast the future burden and its attributable risk factors of infective endocarditis(IE).Methods We analyzed the disease burden of IE and its risk factors from 1990 to 2019 using the Global Burden of Di... Objective To forecast the future burden and its attributable risk factors of infective endocarditis(IE).Methods We analyzed the disease burden of IE and its risk factors from 1990 to 2019 using the Global Burden of Disease 2019 database and projected the disease burden from 2020 to 2030 using a Bayesian age-period-cohort model.Results By 2030,the incidence of IE will increase uncontrollably on a global scale,with developed countries having the largest number of cases and developing countries experiencing the fastest growth.The affected population will be predominantly males,but the gender gap will narrow.The elderly in high-income countries will bear the greatest burden,with a gradual shift to middle-income countries.The incidence of IE in countries with middle/high-middle social-demographic indicators(SDI) will surpass that of high SDI countries.In China,the incidence rate and the number of IE will reach 18.07 per 100,000 and 451,596 in 2030,respectively.IEassociated deaths and heart failure will continue to impose a significant burden on society,the burden on women will increase and surpass that on men,and the elderly in high-SDI countries will bear the heaviest burden.High systolic blood pressure has become the primary risk factor for IE-related death.Conclusions This study provides comprehensive analyses of the disease burden and risk factors of IE worldwide over the next decade.The IE-associated incidence will increase in the future and the death and heart failure burden will not be appropriately controlled.Gender,age,regional,and country heterogeneity should be taken seriously to facilitate in making effective strategies for lowering the IE disease burden. 展开更多
关键词 infective endocarditis disease burden risk factors Bayesian age-period-cohort model PROJECTION
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