# Implications of clearing data

Implications of clearing data

Affected area | What happens when you clear an item
--- | ---
Queries on a cleared item | In a regular CRF with no itemsets, the following status changes occur: An Automatic query is changed to Closed. For manual queries: An Opened query is changed to Answered. A Candidate query is purged. Other queries are unchanged. In a CRF with itemsets, queries on an itemset are treated as if the itemset were one item, and the same status changes occur as they would for an item.
Itemsets | If an itemset is deleted, the deleted data is cleared. The audit trail records two entries indicating that the data was deleted and then cleared.
Calculated control | The value of the calculated control is cleared if the calculated control depends on the cleared item.
CDD (customer-defined database) mapping for a cleared item | The value mapped to the CDD is cleared along with the value of the cleared item.
Subject number | After you enter a Subject Number, you cannot clear it.
Randomization number | After you calculate a Randomization Number, you cannot clear it.

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