| leverage_plot {rnmamod} | R Documentation |
Leverage plot
Description
Plots the leverage against the square root of the posterior mean of residual deviance of the trial-arms under the model of interest.
Usage
leverage_plot(net, drug_names, title)
Arguments
net |
An object of S3 class |
drug_names |
A vector of labels with the name of the interventions in
the order they appear in the argument |
title |
A title to indicate the model (consistency model, network meta-regression or unrelated mean effects model). |
Details
leverage_plot is integrated in the ume_plot
function to create the leverage plot for the consistency model and the
unrelated mean effects model. These plots appear side-by-side in the output
of ume_plot. Dias et al. (2010) used leverage plots to
investigate the fit of the consistency and inconsistency models–the
latter through the node-splitting approach.
Value
A scatterplot of the leverage against the square root of the
posterior mean of residual deviance of the trial-arms under the model of
interest. The green, yellow, and red curves correspond to the parabola
x^2 + y = k with k = 1, 2, and 3, respectively. The data points
correspond to trial-arms. Data points found outside the yellow parabola are
linked with a pair of numbers. The first number refers to the position
of the trial in the dataset, and the second number refers to the
corresponding trial-arm (see 'Arguments' and 'Value' in
data_preparation). These trial-arms contribute more than
1 to the deviance information criterion and, hence, the model's poor fit.
Author(s)
Loukia M. Spineli
References
Dias S, Welton NJ, Caldwell DM, Ades AE. Checking consistency in mixed treatment comparison meta-analysis. Stat Med 2010;29(7-8):932–44. doi: 10.1002/sim.3767
See Also
data_preparation, run_metareg,
run_model, run_ume, ume_plot