How can I map each drop-out reason to a separate CDD column?

If you are implementing a Customer-defined Database (CDD), and, for example, want to map each drop-out reason to a separate CDD column, we recommend that you consider using one of the following designs:

Create a compound item—Create a compound item in which the No response to the study completion status question has multiple-selection child items for each drop-out reason. The compound item and its child items do not have a value for the Special Fields custom property.
Create a hidden Yes No item—Create a hidden item with a codelist that has Yes and No codelist items.
Custom properties:
- Item—Special Fields property value is Completion status (Study Completion).
- Yes codelist item—Study Completion Status Items value is Complete Study (Study Completion).
- No codelist item—Study Completion Status Items value is Incomplete Study (Study Completion).
Create a hidden item—Create a hidden item with a codelist in which each codelist item corresponds to a child item in No response of the visible compound item.
Custom property:
- Item—Special Fields property value is Drop out reason (Study Completion).
Create calculation rules—Create calculation rules that map:
- The Yes response in the compound item to the Yes codelist item in the hidden Yes No item.
- The No response in the compound item to the No codelist item in the hidden Yes No item.
- The selected child item in the No response of the compound item to the corresponding codelist item in the hidden Reason for noncompletion item.
Note: Because the compound item allows multiple selections, and the hidden item requires a single selection, the rule must contain logic that prioritizes the noncompletion reason to select in the hidden item if multiple reasons are selected in the compound item.
Create a CDD mapping—In a CDD mapping, map each child item in the compound item to a different data series. Each data series maps to a separate CDD column.