Software to Determinate the Sample Size in Clinical Trials

In clinical trials, the number of subjects to include is one of he most important aspects to define because of its ethics and economic consequences. The lack of a powerful software for such functions made us to program it in WINDOWS using Borland Delphi 2.0. With the software the user can determine the sample size of twenty research designs. Each design give the possibility of make the inverse calculations, information about the theoretical fundaments and bibliographic references. In addition the software have mathematical tools to make easier the calculations. 1