The RSMTREG procedure analyzes time-to-event data by performing a regression analysis on the restricted mean survival time (RMST), which is the expected value of the time-to-event variable up to a prespecified time point. The regression model is a generalized linear model that models the RMST directly and supports classification and interaction effects, along with the linear and log link functions. Models are fitted by using methods based on the estimating equations, particularly the pseudovalue (PV) method (Andersen, Hansen, and Klein 2004) and the inverse probability censoring weighting (IPCW) method (Tian, Zhao, and Wei 2014).