# What is a forest plot in R?

## What is a forest plot in R?

A forest plot (sometimes called a “blobbogram”) is used in a meta-analysis to visualize the results of several studies in one plot. The x-axis displays the value of interest in the studies (often an odds ratio, effect size, or mean difference) and the y-axis displays the results from each individual study.

How do you create a forest plot?

How to create a forest plot in Excel

1. Create a clustered bar. First, highlight the first two columns containing the study name and the effect size.
2. Add in the row positions.
4. Remove the clustered bar graph.
5. Add error bars (whiskers) to the scatter points.
6. Format the forest plot.

What is a forest plot graph?

A blobbogram (sometimes called a forest plot) is a graph that compares several clinical or scientific studies studying the same thing. Originally developed for meta-analysis of randomized controlled trials, the forest plot is now also used for a variety of observational studies.

### Is funnel plot same as forest plot?

A funnel plot is a simple scatter plot of the intervention effect estimates from individual studies against some measure of each study’s size or precision. In common with forest plots, it is most common to plot the effect estimates on the horizontal scale, and thus the measure of study size on the vertical axis.

What data is needed for a forest plot?

Additional data to the forest plot are (1) n, (2) mean and standard deviation, (3) P of each primary study, (4) meta-analysis overall 95% confidence interval, and (5) heterogeneity test result (with statistical significance level).

How many studies are needed for a forest plot?

Each horizontal line put onto a forest plot represents a separate study being analysed. In Figure 3, three studies are represented. Each study ‘result’ has two components to it: A point estimate of the study result represented by a black box.

#### What data is needed for forest plot?

Why are forest plots useful?

Forest plots are easy and straightforward to understand because they provide tabular and graphical information about estimates of comparisons or associations, corresponding precision, and statistical significance. This visual representation also makes it easier to see variations between individual study results.

Why use a forest plot?

## When should I use a forest plot?

Is forest plot only for meta-analysis?

Graphical Depictions of Toxicological Data The forest plot is not necessarily a meta-analytic technique but may be used to display the results of a meta-analysis or as a tool to indicate where a more formal meta-analytic evaluation may be useful. An example of a forest plot is shown in Figure 4.