# BCEA

## BCEA: An R package to perform Bayesian Cost-Effectiveness Analysis

BCEA is a R library specifically designed to post-process the result of a Bayesian health economic evaluation. Typically, this consists in the estimation of a set of relevant parameters that can be combined to produce an estimation of suitable measures of cost ($$c$$) and clinical benefits ($$e$$) associated with an intervention. Within the Bayesian framework, this amounts to estimating a posterior distribution for the pair $$(e,c)$$. Health economic evaluations then proceed by computing some relevant summaries of the resulting decision process: is the innovative intervention $$t=1$$ more “cost-effective” than the standard intervention $$t=0$$?

## Cost-effectiveness acceptability curve plots

Introduction The intention of this vignette is to show how to plot different styles of cost-effectiveness acceptability curves using the BCEA package. Two interventions only This is the simplest case, usually an alternative intervention ($$i=1$$) versus status-quo ($$i=0$$). The plot show the probability that the alternative intervention is cost-effective for each willingness to pay, $$k$$, $p(NB_1 \geq NB_0 | k) \mbox{ where } NB_i = ke - c$

## Set bcea() Parameters: Constructor and Setters

There are several arguments passed to bcea() to specify the form of the analysis. These are bcea(e, c, ref = 1, interventions = NULL, .comparison = NULL, Kmax = 50000, wtp = NULL, plot = FALSE) Those of interest here are: ref is the reference intervention group to compare against the other groups. .comparisons are the groups to compare against ref. The default is all of the non-ref groups.

## Bayesian Cost-Effectiveness Analysis with the R package BCEA

Check out our book on the BCEA R package published by Springer in the UseR! series. This book is co-authored by myself, Andrea Berardi and Anna Heath. Table of contents Preface Get a promotional code - save 20% when ordering online from Springer website Read a sample for free BCEA - an R package to run Bayesian health economic evaluations (used throughout the book and specifically in the examples) Journal editors, journalists or bloggers can request a free Online Review Copy of the book.

## BCEAweb: A web-application to front-end the R package BCEA

BCEAweb is a front-end that can be used to access many of the functionalities of the R package BCEA. It can be accessed here.