Patient ID, essential variables, and other factors are gathered from the Field and Hospital, carefully validated, and then loaded in a computer registry.
The simple and safe way is to make the registry in Excel spread sheats.
From Excel the data can later be imported to any statistics soft-ware for analysis. Find enclosed an Excel registry template you can adapt to your setting. Other options are to build a relations data base can be made (Microsoft Access etc.), or to load the data directly in a program for medical statistics (i.e. JMP).