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If data cannot be collected using fields a field in this guide, then a custom collection field may be used. Naming conventions and other variable creation recommendations in this guide section are designed to allow collection of data irrespective of inclusion in tabulation datasets.

Prior to adding a custom field to a CRF, confirm that none of the data collection fields in this guide or in the CDASH fit the need. Once confirmed, a new data collection fields will fall ifield for a CRF will fell in one of the following

• Fields for Data Cleaning, 

New data collection fields (not already defined in the CDASH Model) will fall under 1 of following categories.

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