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R package for creating accrual plots

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accrualPlot

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Accrual plots are an important tool when monitoring clinical trials. Some trials are terminated early due to low accrual, which is a waste of resources (including time). Assessing accrual rates can also be useful for planning analyses and estimating how long a trial needs to continue recruiting participants. accrualPlot provides tools for such plots

Installation

accrualPlot can be installed from CRAN in the usual manner:

install.packages('accrualPlot')

The development version of the package can be installed from the CTU Bern universe via

install.packages('accrualPlot', repos = 'https://ctu-bern.r-universe.dev')

accrualPlot can be installed directly from from github with:

# install.packages("remotes")
remotes::install_github("CTU-Bern/accrualPlot")

Note that remotes treats any warnings (e.g. that a certain package was built under a different version of R) as errors. If you see such an error, run the following line and try again:

Sys.setenv(R_REMOTES_NO_ERRORS_FROM_WARNINGS = "true")

Overview

The first step to using accrualPlot is to create an accrual dataframe. This is simply a dataframe with a counts of participants included per day.

# load package
library(accrualPlot)
#> Loading required package: lubridate
#> 
#> Attaching package: 'lubridate'
#> The following objects are masked from 'package:base':
#> 
#>     date, intersect, setdiff, union

# demonstration data
data(accrualdemo)

df <- accrual_create_df(accrualdemo$date)

Cumulative and absolute recruitment plots , as well as a method to predict the time point of study completion, are included.

par(mfrow = c(1,3))
plot(df, which = "cum")
plot(df, which = "abs")
plot(df, which = "pred", target = 300)

Acknowledgements

The package logo was created with ggplot2 and hexSticker with icons from Font Awesome (via the emojifont package).

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R package for creating accrual plots

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