How the funnel plot is presented, such as which metric is used for the vertical axis, can substantially change the appearance and hence the interpretation of the plot. Other research has shown that funnel plots are often interpreted inconsistently and that researchers are generally poor at ...
Using funnel plots has several advantages, including clearly visualized precision, detection of volume-effects, discouragement of ranking hospitals and easy interpretation of results. However, without sufficient knowledge of underlying methods, it is easy to stumble into pitfalls, such as overinterpretation...
The use and appropriate interpretation of funnel plots and tests for funnel plot asymmetry have been controversial because of questions about statistical validity,4 disputes over appropriate interpretation,3 5 6 and low power of the tests.2 This article recommends how to examine and interpret funnel ...
The funnel plot is widely used in meta-analysis to detect small study effects, especially publication bias. However, it has been repeatedly shown that the interpretation of funnel plots is highly subjective and often leads to false conclusions regarding t...
The interpretation of such plots may be enhanced by using standard meta-analysis methods. Hazard ratio comparisons may now be added to the repertoire of techniques used by Cancer Registries, Primary Care Trusts, and other commissioners of healthcare. 展开 ...
suchastheinverseofthestandarderrorandthestatisticalpower[1,6,10,11].Acommonlyheldinterpretation is that the points will be symmetrically distributed around the overall effect in the shape of an inverted funnel; when selec- tion bias is present, the plot will become asymmetrical and the overall ...
lines indicating conventional milestones in levels of statistical significance (e.g., ResultsThis contour overlay aids the interpretation of the funnel plot. ... JL Peters,AJ Sutton,DR Jones,... - 《Journal of Clinical Epidemiology》 被引量: 1034发表: 2008年 ...
The Upsetplot shows the total number of uniquely individual venom components present in all replicates (bottom left: set size). A1 represents the baseline venom sample taken one week after the spider was collected. The order of the replicates is shown by the letter T (A1T1, A1T2, A1T3)....
Funnel plots have been proposed as a useful tool for assessing and visualizing surveillance data, but their full utility has not been appreciated (for example, in the incorporation and interpretation of risk factors). Methods We investigate a way to simultaneously focus funnel plot analyses on ...
Summary This chapter contains sections titled: Definition and Rationale History of Funnel Plots Guidelines on Choice of Axis for Funnel Plots Funnel Plots for Studies with Binary Outcomes Funnel Plots for Studies with Numerical Outcomes Interpretation – Sources of Funnel Plot Asymmetry How Many Studies...