All forms are identified by their name (e.g. Adverse Event form, Follow-up Form, etc) and code (number or letter combination). On each form, data are to be completed in a 'numbered box system'. Each box can be identified (and queried) by its box number, listed to the left of the question. Text fields have the same numbering system.

The VISTA-RDC screens have an identical set-up for all forms. The VISTA-RDC screens are divided into 4 areas (see example below):

• (1) Action buttons that help you manage the VISTA-RDC form i.e. Save & close, Save, Cancel, Delete.
• (2) Identification of the current user (username), the EORTC study number (study), patient SeqID and form.
• (3) A series of Boxes to report the requested data.
• (4) A drop down menu next to each box.

Drop down menu to report the requested data

• Date: contains only the ‘force value’ option and the ‘unknown’ option. If it concerns a classification date, you will not be able to put the date as ‘unknown’.
• Question with predefined answers (labeled question: e.g. a no/yes question): contains the predefined answers, the ‘force value’ option and the ‘unknown’ option.
• Numeric question (e.g. value of WBC): contains only the ‘force value’ option and the ‘unknown’ option.
• Text field: contains only the ‘force value’ option and the ‘unknown’ option.

More details on how to complete data on a form can be found on the pages Edit a form (studies with paper queries) and Special issues for entering data (studies with paper queries).