Simulate group sequential cluster-randomized trial.

Usage

gsSimCRT(design, data, stat = c("Z_known", "Z_unknown", "t_unknown"))

design: Object of class gsDesignCRT specifying the group sequential cluster-randomized trial design.
data: Simulated outcomes. Should be an n x 4 matrix with the columns encoding the treatment arm, cluster, individual, and response.
stat: Type of test statistic to use. Options are "Z_known", "Z_unknown", and "t_unknown".

Object containing the following elements:

reject: Whether the null hypothesis was rejected in the simulated trial.
k_i: Interim analysis at which simulated trial was stopped.
m_i: Number of clusters per arm when the simulated trial was stopped.
n_i: Average number of individuals per cluster when the simulated trial was stopped.
total_i: Total number of individuals per arm when the simulated trial was stopped.
i_frac: Information fraction when the simulated trial was stopped.