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在stata软件中实现Contour-enhanced meta-analysis funnel plots绘制 被引量:1
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作者 张天琛 潘发明 +7 位作者 葛锐 梅杨 沈蓓蓓 高静 段振华 曾臻 王笙 李桂兴 《中国卫生统计》 CSCD 北大核心 2012年第1期139-141,共3页
Contour-enhanced meta-analysis funnel plots产生的背景漏斗图是做meta分析时常会用到的一种方法。我们可以很直观的从图上看出散点图的分布是否对称,来评估meta分析结果的稳定性和真实性。这种方法虽然直观,简便,但却不能定量的评估... Contour-enhanced meta-analysis funnel plots产生的背景漏斗图是做meta分析时常会用到的一种方法。我们可以很直观的从图上看出散点图的分布是否对称,来评估meta分析结果的稳定性和真实性。这种方法虽然直观,简便,但却不能定量的评估出漏斗图的偏倚。 展开更多
关键词 meta-analysis STATA软件 meta分析 漏斗图 散点图 稳定性 评估
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基于Meta-analysis的循证检索探讨 被引量:2
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作者 孙思琴 吴晓萍 明红 《现代情报》 北大核心 2006年第4期162-163,169,共3页
目的:调查Meta-analysis的作者们报道检索策略效果证据的范畴。材料:对近10年EBSCO数据库MEDLINE全文子集标引“Meta-analysis”为出版物类型的论文,进行随机抽样调查(n=100)。方法:将这些论文分为三类。结论:最后分析的93篇论文样本中,... 目的:调查Meta-analysis的作者们报道检索策略效果证据的范畴。材料:对近10年EBSCO数据库MEDLINE全文子集标引“Meta-analysis”为出版物类型的论文,进行随机抽样调查(n=100)。方法:将这些论文分为三类。结论:最后分析的93篇论文样本中,A类占8.6%(8篇),B类占61.3%(57篇),C类占30.1%(28篇)。讨论:A类论文报道了先前有效的、公开发表了的或者基于专家意见的检索策略。专家评审标准一定要力争得到进一步发展,那就要求Meta-analysis的作者,对他们检索策略的效果证据要加以报道。 展开更多
关键词 meta-analysis 循证检索 MEDLINE
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Meta-analysis在临床流行病学中的应用 被引量:16
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作者 王天爵 赵树安 《中国卫生统计》 CSCD 北大核心 1993年第5期58-60,共3页
Meta-analysis(MA)是一种新型的研究方法,它把既往有关的各个研究结果进行评论性的复习与统计学的合并,从而得出一定性又定量的新结论,近年来,国外医学杂志已有较多MA文章的报道,多数是关于临床试验分析,现也开始逐渐应用于非实... Meta-analysis(MA)是一种新型的研究方法,它把既往有关的各个研究结果进行评论性的复习与统计学的合并,从而得出一定性又定量的新结论,近年来,国外医学杂志已有较多MA文章的报道,多数是关于临床试验分析,现也开始逐渐应用于非实验流行病学。 展开更多
关键词 meta-analysis 临床流行病学 MA 国外医学 临床试验 研究结果 实验 杂志 结论 复习
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Computed tomography versus transthoracic echocardiography in the detection of complex congenial heart diseases in china:a meta-analysis
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作者 畅智慧 LIN Kun +3 位作者 DU Xiao-li YIN Xiao-li LU Zhao 刘兆玉 《放射学实践》 2012年第11期1168-1173,共6页
Objective:To perform a meta-analysis to evaluate the diagnostic performance of computed tomography(CT) and transthoracic echocardiography(TTE) in complex congenital heart diseases(CHD) in China.Methods:MEDLINE,Cochran... Objective:To perform a meta-analysis to evaluate the diagnostic performance of computed tomography(CT) and transthoracic echocardiography(TTE) in complex congenital heart diseases(CHD) in China.Methods:MEDLINE,Cochrane library and China National Knowledge Infrastructure(CNKI) database from January 1966 to October 2010,were searched for initial studies in China.All the studies,published in English or Chinese,used TTE,CT,or both as diagnostic tests for CHD and reported the rate of true-positive,true-negative,false-positive and false-negative diagnoses of CHD from TTE and CT findings with the surgical results as the 'gold-standard'(15 studies,XX patients) were collected.The statistic software package,'Meta-Disc 1.4',was used to conduct data analysis.A covariate analysis was used to evaluate the influence of patient or study-related factors on sensitivity.Results:Pooled sensitivity for diagnosis of CHD were 95% [95% confidence interval(CI):94%~96%] for CT studies and 87%(95% CI:85%~88%) for TTE studies.The difference between the pooled sensitivity of CT and that of TTE was statistically significant(P<0.001).TTE had higher sensitivity [0.96(95% CI:0.94~0.97)] for cardiac malformation but lower sensitivity [0.78(95% CI:0.76~0.81)] for extracardiac malformation than CT.Conclusion:CT can provide added diagnostic information compared with TTE in patients with CHD in China,especially for patients suspected of extracardiac malformation. 展开更多
关键词 ECHOCARDIOGRAPHY Tomography X-ray computed Heart Defects Congenital meta-analysis
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预防性护理对肺癌患者治疗后深静脉血栓形成率的临床效果:A meta-analysis 被引量:18
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作者 高苗 冯娜 +3 位作者 左秀萍 张美霞 张朋勃 徐梦 《海南医学院学报》 CAS 2020年第8期618-623,共6页
目的:研究预防性护理干预对肺癌治疗后深静脉血栓形成率,护理满意度和平均住院时间的临床效果。方法:检索中文数据库(万方,维普以及中国知网)和英文数据库(Pubmed,Cochrane以及Scopus),并阅读相关研究的参考文献。采用Review Manager 5.... 目的:研究预防性护理干预对肺癌治疗后深静脉血栓形成率,护理满意度和平均住院时间的临床效果。方法:检索中文数据库(万方,维普以及中国知网)和英文数据库(Pubmed,Cochrane以及Scopus),并阅读相关研究的参考文献。采用Review Manager 5.3进行统计分析,比值比(odds ratio,OR)和平均差(mean difference,MD)作为比较组的合并效应值。改变效应模型或排除权重比大的文献进行敏感性分析,观察漏斗图对称性进行发表偏倚检验。结果:共纳入14篇中文研究。与常规护理干预比较,预防性护理干预可以明显降低肺癌治疗后深静脉血栓形成率[OR=0.16(0.10,0.23)],提高护理满意度[OR=6.42(3.32,12.41)]和缩短平均住院时间[MD=-7.41(-8.16,-6.65)],结果均没有异质性存在。而且不管肺癌患者是行切除术还是化疗,预防性护理干预降低深静脉血栓形成率的效果均十分显著。结论:预防性护理干预可能对肺癌患者大有裨益,可以降低深静脉血栓的形成率,具有一定的临床借鉴意义。 展开更多
关键词 预防性护理 肺癌 深静脉血栓形成率 meta-analysis
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CTLA-4+49 A/G Polymorphism and the Risk of Lung Cancer:a Meta-analysis 被引量:1
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作者 Zhengliang WEI Shaoqin ZHANG Jian HU 《中国肺癌杂志》 CAS CSCD 北大核心 2021年第3期173-181,共9页
Background and objective:Lung cancer is one of the malignant tumors.Gene mutations associated with cellular immune function and regulating the activation and proliferation of immune cells.Several publications have exp... Background and objective:Lung cancer is one of the malignant tumors.Gene mutations associated with cellular immune function and regulating the activation and proliferation of immune cells.Several publications have explored the relationship between cytotoxic T lymphocyte antigen-4(CTLA-4)+49 adenine(A)/guanine(G)polymorphism and susceptibility of lung cancer,but the results remain controversial.Thus,we performed this meta-analysis to derive a more comprehensive estimation of the relationship.Methods:All articles addressed lung cancer and polymorphisms of CTLA-4 were searched from the Pub Med,EMBASE databases published up to June 29,2019.Odds ratios(ORs)with 95%confidence intervals(CIs)were used to assess the strength of association.Publication bias of relevant studies was examined via Begg’s test and funnel plots.Results:The meta-analysis included 8 case-control studies covering 4,430 lung cancer patients and 5,198 healthy controls from September 2008 to April 2020.The overall eligible data indicated that CTLA-4+49 A/G polymorphisms did not correlate with the elevated lung cancer risk in all genetic comparison models(dominant model:OR=1.037,95%CI:0.925-1.161;recessive model:OR=0.968,95%CI:0.888-1.055;allele model:OR=0.992,95%CI:0.933-1.054;homozygous model:OR=0.980,95%CI:0.857-1.121;heterozygous model:OR=1.023,95%CI:0.906-1.154).In further stratified analyses,CTLA-4+49 A/G polymorphism was found to be significantly associated with susceptibility to NSCLC in these models(dominant model:OR=1.404,95%CI:1.074-1.836;allele model:OR=1.273,95%CI:1.034-1.565;homozygous model:OR=1.553,95%CI:1.044-2.310;heterozygous model:OR=1.308,95%CI:1.062-1.611).Conclusion:CTLA-4+49 A/G polymorphism were not associated with the risk of lung cancer but might be a risk factor only in NSCLC. 展开更多
关键词 CTLA-4 POLYMORPHISM Lung neoplasms meta-analysis
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Efficacy of acupuncture on acute tonsillitis:a systematic review and meta-analysis 被引量:1
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作者 ZHANG Shuo CUI Yang +2 位作者 ZHOU Xinyu CAO Yu YIN Hongna 《中国药理学与毒理学杂志》 CAS 北大核心 2023年第S01期75-76,共2页
OBJECTIVE To systematically assess the efficacy and safety of acupuncture in treating acute tonsillitis,providing a reference for clinical decision-making.METHODS We searched PubMed,CENTRAL,Embase,Web of Science,China... OBJECTIVE To systematically assess the efficacy and safety of acupuncture in treating acute tonsillitis,providing a reference for clinical decision-making.METHODS We searched PubMed,CENTRAL,Embase,Web of Science,China National Knowledge Infrastruc⁃ture,China Biomedical,clinical research registra⁃tion platforms,grey literature,and the reference lists of the selected studies from inception to Oct.30,2022.The risk of bias assessment used Rev⁃Man.Meta-analysis was performed using STATA with Hedges′g value.In addition,we performed subgroup analysis,meta-regression,and publica⁃tion bias detection with Harbord′s and Egger′s tests.RESULTS We included 19 randomized controlled trials comprising 1701 patients,of which 1 study was assessed high risk of bias.The primary outcome,the response rate,revealed that acupuncture was more effective than antibi⁃otics.The secondary outcomes showed that the difference in the reduction of the VAS scores,sore throat time,and white blood cell counts was statistically significant with acupuncture compared to antibiotics.However,the difference in modulat⁃ing neutrophil percentage and C-reactive protein was not statistically significant.Besides,acupuncture treatments showed a lower incidence of adverse events than antibiotics.CONCLUSION Acupuncture therapy on acute tonsillitis is safe,and the response rate is superior to antibiotics.For alleviating sore throat symptoms,shortening sore throat time,and improving immune in fl am mation index,acupuncture has positive signi fi cance.Nevertheless,because of the limitations of this study,our conclusions should be inter⁃preted with caution.Future efforts still need more high-quality trials to improve the methodology and reporting quality. 展开更多
关键词 ACUPUNCTURE acupuncture analgesia acute pharynx infections systematic review meta-analysis
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Analgesic effects of different acupuncture therapies on postherpetic neuralgia:a Bayes⁃ian network meta-analysis 被引量:1
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作者 CUI Yang SUN Zhongren +2 位作者 ZHOU Xinyu ZHANG Shuo YIN Hongna 《中国药理学与毒理学杂志》 CAS 北大核心 2023年第S01期72-72,共1页
OBJECTIVE To assess the effi⁃cacy and safety of acupuncture-related treat⁃ments for postherpetic neuralgia(PHN),identify the most effective acupuncture and related treat⁃ments.METHODS PubMed,Cochrane Central Register ... OBJECTIVE To assess the effi⁃cacy and safety of acupuncture-related treat⁃ments for postherpetic neuralgia(PHN),identify the most effective acupuncture and related treat⁃ments.METHODS PubMed,Cochrane Central Register of Controlled Trials,Embase,Web of Science,and four Chinese databases,a clinical research registration platform,and grey literature were searched.We evaluated the risk of bias and quality in the included studies and per⁃formed a Bayesian multiple network meta-analysis.RESULTS We included 29 randomized controlled trials comprising 1973 patients,of which approximately 17.24%showed a high risk of bias.According to the Jadad scale,2,16,and 11 studies were high,medium,and low quality,respectively.The pairwise meta-analysis results revealed that the efficacy of all acupuncture-related treatments for pain relief related to PHN showed the difference was statistically significant com⁃pared with that of antiepileptics.The network meta-analysis results showed that pricking and cupping plus antiepileptics were the most effective,followed by electroacupuncture(EA)plus antiepileptics for pain relief in patients with PHN.EA plus antiepileptics ranked the best regarding reduced Pittsburgh Sleep Quality Index and Self-Rating Depression Scale scores in patients with PHN.No results were found regarding total response rate or quality of life among this study.Acupuncture-related treatments showed a lower incidence of adverse events than that of antiepi⁃leptics-related treatments.CONCLUSION Acu⁃puncture-related therapies may be potential treat⁃ment options for PHN and are relatively safe.Pricking and cupping plus antiepileptics are the most effective techniques for pain relief.EA plus antiepileptics is the best approach for improving insomnia and depression symptoms of PHN. 展开更多
关键词 ACUPUNCTURE acupuncture analge⁃sia postherpetic neuralgia systematic review network meta-analysis
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Meta-analysis of relationship between CYP2E1 and ALDH2 polymorphisms and hepatocellular carcinoma risk
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《中国药理学通报》 CAS CSCD 北大核心 2015年第B11期38-38,共1页
The cytochrome P450 2El ( CYP2E1 ) and aldehyde dehydrogenase 2 (ALDH2) have been demonstrated that they were related to the development of hepatocellular carcinoma (HCC). However, the associations have not been... The cytochrome P450 2El ( CYP2E1 ) and aldehyde dehydrogenase 2 (ALDH2) have been demonstrated that they were related to the development of hepatocellular carcinoma (HCC). However, the associations have not been explained conclusively, and the combined analysis with the CYP2E1 Rsa I polymorphism and the ALDH2 pol- ymorphism have not been clarifed. In this study, we performed a meta-analysis to interpret the association between CYP2E1 and ALDH2 polymorphisms and HCC risk. Published literatures were retrieved from PubMed and Embase up to July, 2014. The pooled odds ratio (OR) with 95% confidence interval (CI) was calculated by using fixed- effects or random-effects model. A total of twelve case-controlled studies with 1 077 cancer cases and 2 000 controls concerning the CYP2E1 polymorphism were selected for this meta-analysis. The results indicated that there was no significantly associations between CYP2E1 polymorphism and risk of HCC (cl/c2 vs el/el : OR - 1.11, 95% CI: 0.88-=1.39, P-0.38; c2/c2 vs el/el. OR -0.90, 95% CI. 0.54-=1.50, P-0.69; cl/c2 + c2/c2 vs el/ el : OR - 1.07, 95% CI: 0.89 -~ 1.30, P -0.47). Further analysis of subgroup based on the ethnicity also showed no statistically significant associated with risk of HCC between the East Asians and the Europeans. In addi- tion, eight studies including 911 cases and 1 903 controls were included in this meta-analysis about the association between ALDH2 polymorphism and HCC risk. Results Based on our study also showed no significant association between ALDH2 polymorphism and the risk of HCC risk ( * 1/* 2 vs * 1/* 1: OR -0. 92, 95% CI: 0.65 -* 1.32, P-0.66; ,2/,2 vs * 1/* 1. OR -0.82, 95% CI. 0.57-=1.18, P-0.28, * 1/,2 + ,2/,2 vs * 1/* 1 : OR -0.90, 95% CI. 0. 63 -- 1.29, P -0. 57). The present meta-analysis indicated that there was no sig- nificant association between CYP2E1 polymorphism or ALDH2 polymorphism and HCC risk in the East Asians and the Europeans. 展开更多
关键词 CYP2E1 ALDH2 Polymorphism HEPATOCELLULAR carcinoma cancer RISK meta-analysis
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Optimization ratio between Coptis chinensis and cinnamo of Jiaotai pill plus benzodiazepines for insomnia in China:a network meta-analysis
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作者 SUN Shi-guang WANG Qun CHEN Li-jing 《中国药理学与毒理学杂志》 CAS 北大核心 2021年第10期737-737,共1页
OBJECTIVE To explore the efficacy of Jiaotai pill(JTW)and JTW modified prescriptions(JTW^(+))plus benzodiazepines(BDZ)for insomnia in China by systematic review and network meta-analysis,especially optimization ratio(... OBJECTIVE To explore the efficacy of Jiaotai pill(JTW)and JTW modified prescriptions(JTW^(+))plus benzodiazepines(BDZ)for insomnia in China by systematic review and network meta-analysis,especially optimization ratio(_(m:n))between Coptis chinensis and Cinnamo.METHODS Randomized controlled trials(RCTs)regarding JTW and JTW^(+)+BDZ for insomina were comprehensively searched in CNKI,VIP,Wanfang,and PubMed,Cochrane Library,OVID,Embase databases from their inception to December 2017.The risk of bias was assessed by the Cochrane collaboration′s tool and Jadad scale.Systematic review and network meta-analysis were performed to evaluate the relative risk(RR)plus 95%confidence interval(95%CI)or prediction interval(95%PrI),and draw surface under the cumulative ranking curves(SUCRA)by Stata 14.0 and RevMan 5.0 software.RESULTS A total of 13 RCTs(1 RCT was omitted by sensitivity analysis)with 1040 patients were included.Overall heterogeneity was acceptable,except publication bias.Based on classical meta-analysis,JTW and JTW_(m:n)^(+)+BDZ,such as JTW_(2:1)^(+)+BDZ,JTW_(5:1)^(+)+BDZ,JTW_(6:1)^(+)+BDZ,JTW_(10:1)^(+)+BDZ,had more efficacy than BDZ.Based on network meta-analysis,JTW and JTW_(m:n)^(+)+BDZ,such as JTW_(2:1)^(+)+BDZ,JTW_(6:1)^(+)+BDZ,JTW_(10:1)^(+)+BDZ,had more efficacy than BDZ;meanwhile,SUCRA showed the best rank of JTW/JTW+(BDZ<JTW_(m:n)^(+)+BDZ<JTW)for insomina,as same as that of JTW_(m:n)+(BDZ<JTW_(5:1)^(+)+BDZ<JTW_(10:1)^(+)+BDZ<JTW_(2:1)^(+)+BDZ<JTW_(6:1)^(+)+BDZ).CONCLUSION Based on the existing clinical evidence,JTW has efficacy for insomnia,but the optimization ratio between Coptis chinensis and cinnamo of JTW_(m:n)^(+)+BDZ for insomnia needs more supports. 展开更多
关键词 Jiaotai pill Coptis chinensis cinnamo RATIO INSOMNIA randomized controlled trial systematic review network meta-analysis
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Exercise-based rehabilitation programmes for pulmonary hypertension:a systematic review and meta-analysis of randomized controlled trails
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作者 Lu Yan Qingyun Yan Zhihong Liu 《中国循环杂志》 CSCD 北大核心 2018年第S01期167-168,共2页
Objective Individuals with pulmonary hypertension(PH)have reduced exercise capacity and quality of life.Exercise-based rehabilitation may have beneficial effects to improve the exercise capacity and quality of life in... Objective Individuals with pulmonary hypertension(PH)have reduced exercise capacity and quality of life.Exercise-based rehabilitation may have beneficial effects to improve the exercise capacity and quality of life in patients with PH.We aim to assess the efficacy and safety of exercised-based rehabilitation for people eith PH by performing a randomized controlled trails(RCTs)meta-analysis of exercised-based rehabilitation for people with PH by performing a randomized controlled trails meta-analysis. 展开更多
关键词 PULMONARY hypertension RANDOMIZED CONTROLLED TRAILS TRAILS meta-analysis
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新疆农田施磷量、磷肥效率及磷肥品种长期演变 被引量:25
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作者 陈家杰 关钰 +1 位作者 王静 褚贵新 《新疆农业科学》 CAS CSCD 北大核心 2016年第10期1858-1866,共9页
【目的】研究新疆农田磷肥施用量与新疆主要农作物磷肥利用率的长期演变,为新疆农田合理施用磷肥与磷素养分高效利用提供理论依据。【方法】收集1949-2012年新疆统计年鉴及CNKI文献中,有关新疆农田作物产量、施磷量、磷肥利用率及磷肥... 【目的】研究新疆农田磷肥施用量与新疆主要农作物磷肥利用率的长期演变,为新疆农田合理施用磷肥与磷素养分高效利用提供理论依据。【方法】收集1949-2012年新疆统计年鉴及CNKI文献中,有关新疆农田作物产量、施磷量、磷肥利用率及磷肥品种的数据资料,对其随年代演变进行统计分析,并对磷肥利用率的数据进行Meta分析。【结果】新疆小麦、玉米和棉花的单位面积产量均随年代推移而增加,且明显表现为稳步上升(1949-1980)、快速上升(1981-1997)和缓慢上升(1998-2012)三个阶段。化肥和磷肥的施用量均随施肥年代推移而逐步增加,化肥(N+P2O5+K2O)和磷肥(P2O5)施用量分别从1979年的35.4和8.3 kg/hm2增加到2012年的376.1和95.5 kg/hm2,年递增率则分别为7.4%及7.7%。小麦、玉米和棉花的化肥和磷肥的偏生产力均随着年代推移而逐渐降低,化肥偏生产力从1979年的44.2 kg/kg(小麦)、61.2 kg/kg(玉米)和9.3 kg/kg(棉花),分别降低到2012年的14.2、18.4和5.5 kg/kg。3种作物的磷肥偏生产力从1979年的189.1、262.0和39.8 kg/kg分别降低到2012年的72.5、55.9和21.5 kg/kg。Meta分析表明磷肥利用率随年代呈现微弱递增趋势,32年(1981-2012)磷肥利用率的平均值是18.2%(n=334)。【结论】新疆磷肥施用量随施磷年代明显增加,但磷肥增产效益却随年代推移而下降。磷肥利用率随着年代推移呈现微弱递增趋势,磷肥占施肥总量的比例随着年代推移而增加。同时施用磷肥品种随着年代推移呈现由低浓度向高浓度演替,施用方法表现为由以基肥为主逐渐转变为基肥与追肥相结合的施磷方式。 展开更多
关键词 长期施肥 单产 磷肥利用率 meta-analysis 磷肥品种
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中国脑梗死患者静脉溶栓后出血转化危险因素的系统评价及Meta分析 被引量:8
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作者 YIJIA GUO YAQIONG YANG +1 位作者 MUKE ZHOU 何俐 《中国卒中杂志》 2018年第11期1202-1204,共3页
Stroke&Vascular Neurology(SVN)新近上线的文章“Risk factors of haemorrhagic transformation for acute ischemic stroke in Chinese patients receiving intravenous recombinant tissue plasminogen activator:a systematic r... Stroke&Vascular Neurology(SVN)新近上线的文章“Risk factors of haemorrhagic transformation for acute ischemic stroke in Chinese patients receiving intravenous recombinant tissue plasminogen activator:a systematic review and meta-analysis”,由四川大学华西医院神经内科何俐教授团队共同完成。 展开更多
关键词 META分析 脑梗死患者 meta-analysis 危险因素 出血转化 PLASMINOGEN systematic 溶栓后
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保护性措施对中低肥力黑土区有机质变化的影响 被引量:2
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作者 李贝 丁广歌 +4 位作者 赵鹏飞 周丹 赵闯 米国华 张卫峰 《农业环境科学学报》 CAS CSCD 北大核心 2020年第4期891-900,共10页
为探索农户采用保护性措施对东北黑土区土壤有机质(SOM)变化的影响,通过跟踪2008年至2015年间梨树县19个乡镇341块农田SOM的变化,分析了免耕、秸秆还田和有机肥施用三项保护性措施采用情况对SOM变化的影响。2015年梨树县SOM平均为18.8 g... 为探索农户采用保护性措施对东北黑土区土壤有机质(SOM)变化的影响,通过跟踪2008年至2015年间梨树县19个乡镇341块农田SOM的变化,分析了免耕、秸秆还田和有机肥施用三项保护性措施采用情况对SOM变化的影响。2015年梨树县SOM平均为18.8 g·kg^-1,较8年前下降了10.5%(P<0.05)。土壤初始SOM含量越高,其SOM下降越明显。在初始SOM>20 g·kg^-1的区域,SOM显著降低,但在初始SOM≤20 g·kg^-1的区域,SOM含量较2008年提升了4.5%(15.3 g·kg^-1)。主要是因为SOM≤20 g·kg^-1区域采用过保护性措施的农户比例高达63.2%,而SOM>20 g·kg^-1区域农户采用比例为49.3%。同时发现在初始SOM较低的土壤,采用单项保护性措施可以维持甚至提高SOM,同时采用三项措施显著提升了SOM。但在初始SOM较高的土壤,两项措施结合才可维持SOM不下降。目前梨树黑土区保护性措施的采用可以维持甚至提高SOM,但在应用时需要加强应用时间的连续和技术间的集成。 展开更多
关键词 免耕 秸秆还田 有机肥 meta-analysis
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草地生态管理下内蒙古草地土壤有机碳库动态研究 被引量:8
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作者 罗文蓉 胡国铮 高清竹 《生态与农村环境学报》 CAS CSCD 北大核心 2020年第12期1588-1597,共10页
为探究草地生态管理措施下土壤有机碳库的动态变化,科学评估草地生态建设成效及草地碳循环,以内蒙古草原为研究区,基于IPCC Tier 2碳收支清单方法,分析2001—2015年内蒙古各管理草地面积变化动态,并估算不同管理措施(禁牧、休牧、轮牧... 为探究草地生态管理措施下土壤有机碳库的动态变化,科学评估草地生态建设成效及草地碳循环,以内蒙古草原为研究区,基于IPCC Tier 2碳收支清单方法,分析2001—2015年内蒙古各管理草地面积变化动态,并估算不同管理措施(禁牧、休牧、轮牧、围栏、改良和人工种草)下内蒙古不同类型草地(温带草甸草原、温带典型草原和温带荒漠草原)表层土壤有机碳储量。结果表明:(1)2001—2015年内蒙古各管理草地面积变化不一致,活动面积整体随时间呈显著增加趋势(P<0.01);(2)不同草地管理措施下土壤固碳速率变化不同。禁牧和休牧措施下的土壤固碳速率呈显著上升趋势(P<0.05),草地管理措施促进土壤固碳;(3)2001—2015年内蒙古草地总体表现为碳汇,采用整合分析(Meta-analysis)得到不同草地管理措施下土壤有机碳的确定区间,土壤有机碳变化速率平均为(473.70±53.93)万t·a-1(以C计);不同类型草地土壤固碳速率均增加,其中典型草原的年变化量最大,平均为(174.22±74.70)万t·a-1(以C计)。内蒙古草地生态系统具有较大的碳汇潜力,在未来全球碳平衡中将发挥更大的作用;草地生态管理提升了土壤有机碳汇速率,不仅有利于北方草地的生态保护,也为我国生态、经济和社会效益提供了保障。 展开更多
关键词 管理措施 内蒙古草地 有机碳储量 整合分析(meta-analysis)
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有机肥配施对中国农田土壤容重影响的整合分析 被引量:30
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作者 刘丽媛 徐艳 +2 位作者 朱书豪 高艺 郑向群 《农业资源与环境学报》 CAS CSCD 北大核心 2021年第5期867-873,共7页
有机肥配施是我国化肥减施的重要手段之一,探究化学氮肥减施并配施有机肥对不同土壤利用类型、土壤质地及有机肥类型下土壤容重的影响程度,对于深刻认识农田土壤物理状况具有重要意义。本研究通过整合2000年1月1日至2020年5月31日期间... 有机肥配施是我国化肥减施的重要手段之一,探究化学氮肥减施并配施有机肥对不同土壤利用类型、土壤质地及有机肥类型下土壤容重的影响程度,对于深刻认识农田土壤物理状况具有重要意义。本研究通过整合2000年1月1日至2020年5月31日期间已公开发表的文献数据,建立了包含320组相对独立数据的数据库。利用Meta-analysis定量分析不同土壤利用类型、土壤质地、有机肥类型、有机肥施用量、施用频次和施用年限等分类条件下化学氮肥减施并配施有机肥对土壤容重的影响。结果表明,与常规化学氮肥施用相比,配施有机肥显著降低了土壤容重,平均降幅为4.53%。不同土壤利用类型下,有机肥配施显著降低了果园土壤容重,降幅为9.06%,显著高于水田(3.72%)和旱地(5.25%)土壤容重的降幅。不同土壤质地下,有机肥配施使砂土土壤容重下降6.96%,显著高于壤土和黏土容重的降幅。不同有机肥类型之间,生物肥料对土壤容重的影响最大,土壤容重降幅为5.70%,生物炭的影响次之,其土壤容重的降幅为5.21%,二者对土壤容重的影响显著大于动物粪肥和作物秸秆(土壤容重降幅分别为3.67%和2.30%)。此外,土壤容重的下降幅度随有机肥施用量和施用年限、施用频次的增加而呈现增大趋势。本研究为评估我国化学氮肥减施对土壤容重的影响提供了数据基础。 展开更多
关键词 化学氮肥 有机肥 土壤容重 meta-analysis
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绿地与居民超重肥胖之间关系的Meta分析 被引量:5
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作者 杨文越 杨如玉 李晖 《生态学报》 CAS CSCD 北大核心 2022年第10期4284-4299,共16页
已有研究表明,绿地与周边人群超重和肥胖风险存在潜在关联,然而其具体效应有待测定。采用Meta分析(meta-analysis)方法对69篇绿地与居民超重肥胖关系的研究结果进行统计分析,并探究了不同研究设计、绿地指标、样本年龄和不同尺度地理分... 已有研究表明,绿地与周边人群超重和肥胖风险存在潜在关联,然而其具体效应有待测定。采用Meta分析(meta-analysis)方法对69篇绿地与居民超重肥胖关系的研究结果进行统计分析,并探究了不同研究设计、绿地指标、样本年龄和不同尺度地理分析单元等亚组的研究结果差异,发现:(1)总体上,绿地与居民超重或肥胖风险、身体质量指数(body mass index, BMI)和腰围呈负相关关系,但不同研究设计类型(横截面研究和队列研究)之间的研究结果具有较大差异。(2)对于不同的绿地指标,其与居民超重肥胖的关系也存在一定差异。(3)相较于儿童和青少年,绿地与成年人超重肥胖的关联性更显著。(4)两者之间的关系具有明显的尺度效应。Meta分析结果显示,绿地与居民超重肥胖关系在各亚组中存在混杂,意味着它们的关系可能更加复杂,这对未来研究起到一定启示作用:应增加纵向研究以更深入探讨两者之间的因果关系和作用机理;构建完善的绿地测度指标体系,考虑多尺度地理分析单元的影响差异;同时,不应忽视来自样本多方面混杂因素的影响,从而使未来相关领域研究得出更明晰的结论,为城市绿地系统规划及相关政策制定提供科学依据。 展开更多
关键词 绿地 超重 肥胖 身体质量指数(BMI) Meta分析(meta-analysis) 亚组分析
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王福俤教授团队和闵军霞教授团队合作研究发现补锌可以有效防治糖尿病
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《浙江大学学报(医学版)》 CAS CSCD 北大核心 2019年第4期372-372,共1页
2019年6月4日,《美国临床营养学杂志》( The American Journal of Clinical Nutrition )在线发表王福俤教授团队和闵军霞教授团队最新研究成果论文“Zinc supplementation improves glycemic control for diabetes prevention and manag... 2019年6月4日,《美国临床营养学杂志》( The American Journal of Clinical Nutrition )在线发表王福俤教授团队和闵军霞教授团队最新研究成果论文“Zinc supplementation improves glycemic control for diabetes prevention and management: a systematic review and meta-analysis of randomized controlled trials”(https://doi.org/10.1093/ajcn/nqz041),肯定补锌可用于2型糖尿病和妊娠期糖尿病预防及治疗,为糖尿病防控提供了新的视角和策略。 展开更多
关键词 妊娠期糖尿病 meta-analysis 团队合作 补锌 PREVENTION systematic 防治 临床营养学
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英汉骨质疏松学词汇(续)
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作者 徐健 杨定焯 刘忠厚 《中国骨质疏松杂志》 CAS CSCD 2009年第9期706-706,共1页
Marching 配对Measurementbias 测量性偏倚Medium 培养基Meta-analysis 荟萃分析Mevalonate pathway
关键词 meta-analysis 骨质疏松 词汇 荟萃分析 培养基 戊酸盐
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