Sample Size Estimation and Meta-AnalysisR.H. RiffenburghStatistics in Medicine (Third Edition)
Meta-analysis is a statistical method used to combine the results of multiple studies in order to obtain a larger sample size and draw more reliable conclusions. AI generated definition based on: Statistics in Medicine (Third Edition), 2012 ...
在Type of power analysis部分选择Post hoc: Compute achieved power-given α,samplesize,and effect size,Tail(s)部分选择Two,然后在Proportionp 1和Proportionp 2部分分别填入对应的阳性率,在αerr prob部分填入界值,一般默认是0.05,在Samplesize group 1和Samplesize group...
Meta分析(Meta-analysis)常译为汇总分析或荟萃分析,是系统评价(systematic review,SR)中经常用到的统计方法,是运用恰当的统计方法对若干个研究的结果数据进行合并,在医学上常常用于比较干预措施的有效性和安全性。 2、常规Meta分析的不足 常规的meta分析通常只能处理直接比较,比如下图之中的文献评价了虚拟现实(VR)技...
4. No prior knowledge of meta-analysis is assumed in the current article, though it is assumed that the reader is familiar with anova and regression-type statistical models. Key-words: effect size, meta-analysis, null hypothesis significance testing, power, P-values, sample size, statistics, ...
试验序贯分析(trialsequentialanalysis,TSA)用 于系统综述或Meta分析样本量估算,克服了经典的 系统综述或Meta分析的不足 [2,6] 。首先,当Meta分析 纳入的病例数没有达到足够的样本量时,应用TSA 则最大程度地减少因随机误差而产生的假阳性结 果。其次,Meta分析是回顾性研究,TSA得到的期望 ...
Meta-analysis 软件是一款免费的软件且可以进行单个率的Meta 分析,但是其为菜单操作,无法实现对原始率的转换。相比之下,R 软件是一种共享的免费统计软件,有专门的Meta 分析程序包,可以进行单个率的Meta 分析,而且提供了五种方法估算率, 研究者可以根据原始率的分布选择合适的方法。
Estimating the sample mean and standard deviation from the sample size, median, range and/or interquartile range. BMC Med Res Methodol, 2014, 14: 135. 4 Higgins JP, White IR, Anzures-Cabrera J. Meta-analysis of skewed data: combining results reported on log-transformed or raw scales. Stat...
35. This was followed by a meta-analysis with previously published summary statistics from four sub-Saharan African cohorts reaching a combined sample size of about 24,000. We then performed an in depth assessment of the replication of previously associated loci (using the summary statistics from ...
SystematicReviewandMeta-analysis 医学文献的系统评价与Meta分析 Systemat问题的提出对上述结果,是不是难以判断并选择?问题的提出对上述结果,有没有一套规范、科学的方法全面收集、认真选择、严格评价和科学分析相关研究资料,得出综合可靠的结论?目前有,且发展中…Meta分析系统评价有没有一套规范、科学的方法全面收集、认...