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Freezing and locking data
You can freeze or unfreeze data on the subject, visit, and form levels. Freezing prevents changes in data—either temporarily during a study, or permanently at the end of a study.
- Freezing a subject freezes all visits, forms, and items for that subject.
- Freezing a visit freezes all forms and items within the visit.
After a subject, visit, or form is frozen, you cannot update the data, but you can issue manual queries for items. If a repeating form is frozen, no new instances of the repeating form can be added to a visit.
Note: If an update is made to a frozen item when someone responds to a manual query, the item maintains its frozen status to prevent additional updates to the item aside from query generation.
To prevent any further modification to data, you can also lock a subject, visit, or form.
