Transition

Characterise Transitions in Test Result Status in Longitudinal Studies

Analyse data from longitudinal studies to characterise changes in values of semi-quantitative outcome variables within individual subjects, using high performance C++ code to enable rapid processing of large datasets. A flexible methodology is available for codifying these state transitions.

Installation

You can install the currently-released version from CRAN with this R command:

install.packages("Transition")

Alternatively, you can install the latest development version of Transition from GitHub with:

# install.packages("devtools")
devtools::install_github("Mark-Eis/Transition")

Authors: Mark C. Eisler and Ana V. Rabaza

eMail: Mark.Eisler@bristol.ac.uk, arabaza@pasteur.edu.uy

ORCID = 0000-0001-6843-3345, 0000-0002-9713-0797

Transition Package Overview: –

• Identify temporal transitions in test results for individual subjects in a longitudinal study with get_transitions().

• Interpolate these transitions into a data frame for further analysis with add_transitions().

• Identify the previous test result for individual subjects and timepoints in a longitudinal study with get_prev_result().

• Interpolate these previous test results into a data frame for further analysis with add_prev_result().

• Identify the previous test date for individual subjects and timepoints in a longitudinal study get_prev_date().

• Interpolate these previous test dates into a data frame for further analysis with add_prev_date().

• Identify unique values for subjects, timepoints and test results in longitudinal study data with uniques().

Methodology

Transition uses high performance C++ code seamlessly integrated into R using Rcpp to enable rapid processing of large longitudinal study datasets.

Disclaimer

While every effort is made to ensure this package functions as expected, the authors accept no responsibility for the consequences of errors.