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, several fields appear. Each field is identified (and queried) by its field number, listed to the left of the question.

The VISTA-RDC screens have an identical set-up for all forms. The VISTA-RDC screens are divided into 3 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) Fields to report the requested data.

Fields to report the requested data

• Date: should be reported in dd mmm yyyy format e.g. 12 Feb 2014 (day, month and year are a seperate box and a dropdown list appears when you type in the field). If the date is not available, tick the checkbox 'unknown'.
• Question with predefined answers (labeled question: e.g. a no/yes question): radiobuttons allow to select the appropriate answer. By default the answer will be empty. If the answer is not available, select 'Unknown'.
• Numeric question (e.g. value of irradiated dose): unit and format (number of integers and decimals) is displayed next to the field.
• Text field: enter text in this field or tick the checkbox 'unknown' if the answer is not known.