  Platform trials evaluate the efficacy of multiple treatments, allowing for
late entry of the experimental arms and enabling efficiency gains by sharing
controls. The power of individual treatment-control comparisons in such trials
can be improved by utilizing non-concurrent controls (NCC) in the analysis. We
present the R-package NCC for the design and analysis of platform trials using
non-concurrent controls. NCC allows for simulating platform trials and
evaluating the properties of analysis methods that make use of non-concurrent
controls in a variety of settings. We describe the main NCC functions and show
how to use the package to simulate and analyse platform trials by means of
specific examples.
