# Reporting on forms with itemsets

For forms that contain a non-repeating section and an itemset, an association exists between the itemset and non-repeating section. You can create ad hoc reports to show the relationship between the data in a non-repeating section and its associated itemsets. The report output contains columns with data from the non-repeating section, and columns with data from each itemset.

For example, if an itemset exists on the Vital Signs form and the Demographics form, the itemset is associated with the non-repeating sections on each form.

- You can only create reports with data from a non-repeating section and itemsets that exist on the same form, and are therefore associated.
- You can create reports with data from a non-repeating section and itemsets that exist on non-repeating or repeating forms.
- For reports that contain a non-repeating section and multiple itemsets, there is no relationship between the itemsets.
- During study versioning:
  - If a non-repeating section with an associated itemset is deleted, the association between the non-repeating section and the itemset remains for subjects with data in the non-repeating section. You can still generate reports using the existing data from the deleted section for those subjects. For subjects that do not have data in the non-repeating section, the columns in the report are empty.
  - If an itemset with an associated non-repeating section is deleted, the association between the itemset and the non-repeating section remains for subjects with data in the itemset. You can still generate reports using the existing data from the deleted itemset for those subjects. For subjects that do not have data in the itemset, the columns in the report are empty.
  - An association is created between a non-repeating section and an itemset when:
    - A non-repeating section is added to a form that contains an itemset
    - An itemset is added to a form that contains a non-repeating section.

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