目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022...目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022年1—12月于某院经常规胃镜检查发现胃黏膜呈现不典型病变的1325例患者的临床资料。根据所用胃镜电子染色技术的不同,将使用NBI技术的患者划分为NBI组,使用CBI技术的患者划分为CBI组,以1∶4比例进行PSM以调整基线特征的差异,最终纳入NBI组420例和CBI组105例。以病理诊断为金标准,计算2组诊断结果和病理诊断结果的符合率。采用敏感度、特异度、阴性预测值和阳性预测值对2组癌前状态的诊断准确性进行评估。使用R Studio软件进行统计学分析。结果:经过PSM后,2组数据的基线特征一致,且病理诊断结果占比差异无统计学意义(P>0.05)。对比浅表性胃炎、胃息肉和肿瘤,CBI组与NBI组的诊断符合率差异较小;CBI组对萎缩性胃炎的诊断符合率高于NBI组;CBI组对胃溃疡和异型增生的诊断符合率低于NBI组,差异较大。CBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为100.00%、52.08%、100.00%、67.14%,NBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为95.26%、64.29%、92.31%、75.10%。结论:运用CBI技术的国产胃镜对癌前状态的诊断效能与运用NBI技术的进口胃镜相近,在胃癌的早期筛查、诊断中可以优先考虑运用CBI技术的国产胃镜。展开更多
“银发”数字鸿沟是影响老年人生活幸福感的重要问题。本文聚焦于“数字之城”杭州市60岁及以上老年居民的数字鸿沟现状,通过实地调查、问卷和访谈等形式,基于回收的414份有效调查问卷,研究借助描述性分析构建数字反哺指数和数字鸿沟指...“银发”数字鸿沟是影响老年人生活幸福感的重要问题。本文聚焦于“数字之城”杭州市60岁及以上老年居民的数字鸿沟现状,通过实地调查、问卷和访谈等形式,基于回收的414份有效调查问卷,研究借助描述性分析构建数字反哺指数和数字鸿沟指数,以反映杭州市老年人的数字技能现状,采用倾向得分匹配(PSM)分析探究数字反哺对老年人数字鸿沟的弥合作用,最后利用分位数回归分析数字反哺在不同数字鸿沟水平下的异质性影响。研究结果显示,数字反哺对老年人数字鸿沟具有显著的负向影响。此外,数字反哺在提升老年人数字技能方面存在着“马太效应”。The “silver” digital divide is a critical issue affecting the well-being of elderly individuals. This study focuses on the current state of the digital divide among residents aged 60 and above in Hangzhou, a “digital city.” Through field investigations, questionnaires, and interviews, 414 valid survey responses were collected. Using descriptive analysis, a Digital Assistance Index and a Digital Divide Index were constructed to reflect the digital skills of the elderly in Hangzhou. The study employs Propensity Score Matching (PSM) analysis to examine the role of digital assistance in bridging the digital divide among the elderly. Additionally, quantile regression is used to analyze the heterogeneous effects of digital assistance at different levels of the digital divide. The results indicate that digital assistance has a significant negative impact on the digital divide among the elderly. Moreover, there is a “Matthew Effect” in the enhancement of digital skills through digital assistance.展开更多
文摘目的:采用倾向性得分匹配(propensity score matching,PSM)法评价某三甲医院运用分光染色成像(compound band imaging,CBI)技术的国产胃镜与运用窄带成像(narrow band imaging,NBI)技术的进口胃镜的诊断结果一致性。方法:回顾性收集2022年1—12月于某院经常规胃镜检查发现胃黏膜呈现不典型病变的1325例患者的临床资料。根据所用胃镜电子染色技术的不同,将使用NBI技术的患者划分为NBI组,使用CBI技术的患者划分为CBI组,以1∶4比例进行PSM以调整基线特征的差异,最终纳入NBI组420例和CBI组105例。以病理诊断为金标准,计算2组诊断结果和病理诊断结果的符合率。采用敏感度、特异度、阴性预测值和阳性预测值对2组癌前状态的诊断准确性进行评估。使用R Studio软件进行统计学分析。结果:经过PSM后,2组数据的基线特征一致,且病理诊断结果占比差异无统计学意义(P>0.05)。对比浅表性胃炎、胃息肉和肿瘤,CBI组与NBI组的诊断符合率差异较小;CBI组对萎缩性胃炎的诊断符合率高于NBI组;CBI组对胃溃疡和异型增生的诊断符合率低于NBI组,差异较大。CBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为100.00%、52.08%、100.00%、67.14%,NBI组诊断癌前状态的敏感度、特异度、阴性预测值、阳性预测值分别为95.26%、64.29%、92.31%、75.10%。结论:运用CBI技术的国产胃镜对癌前状态的诊断效能与运用NBI技术的进口胃镜相近,在胃癌的早期筛查、诊断中可以优先考虑运用CBI技术的国产胃镜。
文摘“银发”数字鸿沟是影响老年人生活幸福感的重要问题。本文聚焦于“数字之城”杭州市60岁及以上老年居民的数字鸿沟现状,通过实地调查、问卷和访谈等形式,基于回收的414份有效调查问卷,研究借助描述性分析构建数字反哺指数和数字鸿沟指数,以反映杭州市老年人的数字技能现状,采用倾向得分匹配(PSM)分析探究数字反哺对老年人数字鸿沟的弥合作用,最后利用分位数回归分析数字反哺在不同数字鸿沟水平下的异质性影响。研究结果显示,数字反哺对老年人数字鸿沟具有显著的负向影响。此外,数字反哺在提升老年人数字技能方面存在着“马太效应”。The “silver” digital divide is a critical issue affecting the well-being of elderly individuals. This study focuses on the current state of the digital divide among residents aged 60 and above in Hangzhou, a “digital city.” Through field investigations, questionnaires, and interviews, 414 valid survey responses were collected. Using descriptive analysis, a Digital Assistance Index and a Digital Divide Index were constructed to reflect the digital skills of the elderly in Hangzhou. The study employs Propensity Score Matching (PSM) analysis to examine the role of digital assistance in bridging the digital divide among the elderly. Additionally, quantile regression is used to analyze the heterogeneous effects of digital assistance at different levels of the digital divide. The results indicate that digital assistance has a significant negative impact on the digital divide among the elderly. Moreover, there is a “Matthew Effect” in the enhancement of digital skills through digital assistance.
