Introwhen building your CRF in edc2go, you can define any question (element) as a sub-question.
This means that the visibility of this question (or label) in a form depends on the data entry that is done for another question (the parent question) of that form.
1. Create the parent questionfor more information about adding elements to a form, check out this article.
2. Create sub-questionthis question will become visible in the CRF, depending on the answer that is given to the parent question:
Sub-questions and parent questions can only exist in the same form.
- Create the question, specify a question text (and code list options in case the question is checkbox/dropdown or multiple choice).
- Check the box in front of 'Convert to a sub-question', select the parent question from the dropdown (▼) and indicate for which answer the sub-question should become visible.
- In the CRF builder, a sub-question is indicated by a green 'Sub-question' label.
➙ If the parent question is a multiple choice or dropdown, you can only select one option from the codelist options (in this example, you can either choose yes or no, not both). ➙ If the parent question is a checkbox list, you can select more then one option from the codelist items (see example below).
3. Create multiple sub-questions with one parentIn the same way as outlined above, it is possible to create more then one sub-question with the same parent question.
It is also possible for a sub-question to be a parent question to another sub-question.
In this example, the parent question is already a sub-question:
- In case ‘treated with hypoglycemic’ and/or ‘treated with insulin’ is checked, a question ‘Please specify therapy’ should appear.
- In case ‘Other’ is checked, the question ‘Please specify other’ should become available
- In case ‘treated with diet' is ticked, a label should appear that mentions:"Please complete the details about your diet in the DIET form in this CRF".