Medical randomized trials testing treatments are a complex technology and they require regular attention to assure data quality prior to definitive analysis. Typically, only simple non-graphical methods (tables, proportions) help monitor trial progress, except one graph of cumulative accrual...

International experiences with students (high school, medical) and clinical investigators (courses, trials' meetings) demonstrate that Stata is highly visual, intuitive, and relatively straightforward. Stata helps the teacher communicate efficiently and effectively about methods and concepts...