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Questions tagged [funnel-plot]

Used in meta-analysis to display the relationship between effect size and study precision

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1answer
438 views

Trim and fill funnel plot on a single proportion meta analysis [closed]

I have performed a single proportion meta analysis with R. The package I used can perform a trim and fill analysis, but can't actually plot the trim and fill funnel plot. The packages that can do so, ...
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0answers
121 views

Funnel plot limits for indirectly standardized costs and length of stay

This paper: Spiegelhalter, David J. "Funnel plots for comparing institutional performance." Statistics in medicine 24.8 (2005): 1185-1202. describes funnel plot limits for indirectly standardized ...
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1answer
505 views

Publication bias: Egger's Test significant depending on subset. Why doesTrim and Fill not add studies?

For my final thesis I performed a meta-analysis with different subsets (subgroup analysis). Although I systematically searched the literature (I was brutally sophisticated), depending which subset I ...
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139 views

Do I Need to Normalize Data and Compensate for Apparent Overdispersion in Funnel Plots Generated from a 1.2 Million Record Dataset?

I have an anonymized dataset with 1.2 million dog and cat surgical sterilization records from 81 clinics. I would like to measure inter-clinic variation in mortality rate as part of a preliminary ...
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2answers
1k views

Minimal requirements for funnel plots?

Are there basic minimum requirements for funnel plots to be valid or having a sufficient quality to assess publication bias? For example in regard to: Numbers of included studies? Size of included ...
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3answers
172 views

Funnel Plot Question

Hopefully someone can assist a bit, I just came across a funnel plot that I can not interpret. I have a feeling it is due to the high heterogeneity in the Meta-analysis. (I2= 92%) Basically, this was ...
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336 views

Problem using funnel plot to detect outliers

I am trying to detect outliers from a list of genes. Each gene has x number of SNPs, plotted on the X axis, and a score derived from the mean score of each SNP in a test, plotted on the y axis. My ...
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1answer
88 views

How to compare institutions based on the difference between their predicted and observed values?

I have predicted values from an OLS model. I am trying to identify if the predicted value is significantly different to the actual value for an observation. The actual value is a rate (not mean) ...
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1answer
184 views

Interpreting stripe like shapes on funnel plot from meta-analysis

I have a set of 130 measurements from about 30 different studies. I have made a random effects meta-analysis of SMD (standardised mean difference) and ROM (ratio of means). I used the DL (DerSimonian-...
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1answer
387 views

How to standardize proportions from US Census data

In seeing this New York Times graphic on Where Same Sex Couples Live, it appears that the low population counties have the most variation (comparing North Dakota and Ohio, for instance). Presumably ...
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1answer
2k views

Metafor package: bias and sensitivity diagnostics

I am conducting a multi-level meta-analysis that includes some articles with multiple outcomes. Therefore I am using the rma.mv() function. Example code: ...
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2answers
2k views

How would you visualize a segmented funnel? (and could you do it with Python?)

I saw this post on Moz which presented a segmented marketing funnel: This kind of thing would have quite a bit of value in my job. What I have no idea is how to visualize raw data to show a ...
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0answers
712 views

How to calculate SE for the ratio of two proportions?

I have evaluated the prevalence (proportion) of a disease in men and women, in different studies available in the literature. So I have sample sizes for men and women (in different studies) and also ...
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1k views

How to draw a funnel plot for an observational meta-analysis which concerns only with prevalence rates (no odds ratios or standard errors etc.)?

I need to draw a funnel plot for my meta-analysis, which is observational and aggregates prevalence rates of a certain medical condition. As far as I know, a funnel plot is a scatter plot of effect ...
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2answers
897 views

Calculating standard error for funnel plots

I'm a programmer, with a decent but not-expert knowledge of stats, and I'm working through these instructions for how to create funnel plots. I know that there are better ready-made tools (e.g. R) ...
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1answer
918 views

Funnel plot with asymmetrical point sizes

Lets say I want to take the usual funnel plot for meta-analysis, and add another dimension to it, visually changing the points used for each study by a covariate. While it might be easier to change ...
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1answer
761 views

Easy resources for funnel plot

I'm just facing an issue of finding an easy tutorial or guide to the funnel plot. Are there simple resources you recommend for this? Thanks.
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1answer
517 views

Alternative Egger's test, without using standard error

A simplified regression equation $ES=\frac{a+b}{n_1+n_2}$ has been suggested as an alternative to Egger's regression equation $\frac{ES}{SE}=\frac{a+b}{SE}$, where ES=Effect Size, $n_1$=sample size of ...
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1answer
1k views

Alternative funnel plot, without using standard error (SE)

Before submission of my meta-analysis I want to make a funnel plot to test for heterogeneity and publication bias. I have the pooled effect size and the effect sizes from each study, that take values ...
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2answers
7k views

Egger's test in SPSS

How can I conduct an Egger's test using SPSS17? For each study included in the meta-analysis I know effect size and sample size of patients and controls groups.
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2answers
12k views

Egger’s linear regression method intercept in meta analysis

In Meta analysis, how to interpret the Egger’s linear regression method intercept (B0) 10.34631, 95% confidence interval (1.05905, 19.63357), with t=3.54535, df=3. The 1-tailed p-value (recommended) ...
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4answers
13k views

How to draw funnel plot using ggplot2 in R?

As title, I need to draw something like this: Can ggplot, or other packages if ggplot is not capable, be used to draw something like this?
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3answers
1k views

Libraries for forest and funnel plots

Can anyone recommend me an open source graphic library to create forest and funnel plots? I was aiming at using it on a Java desktop application.