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Download NCI Preferred Standard CDEs

The NCI Preferred Standard CDEs represent those that have been through the NCI's Content Owners Governance and have been determined to meet all the necessary criteria for standardization based on NCI Best Practices. When looking for NCI recommended CDEs, this is the place to start.  The attached files are for downloading, a web browser view for comparing or viewing details of these CDEs is available by visiting the CDE Browser and clicking on the "NCI Standards" Context, or by performing an Advanced Search, selecting Registration Status = "Preferred Standard".

Other reusable CDEs can be found by searching using the CDE Browser if you do not find CDEs in the Preferred Standard set that meet your needs.  The community standard CDEs have Registration Status = "Standard", and sort to the top of the search results by default, right after "Preferred Standard" For more information about Content development at NCI, see caDSR Content.


Community Released Downloads
Community Released Downloads
Download caDSR Community Released CDEs


REDCap CDE and CRF Transformation Utilities - REDx

  • These are XSLT files that transform caDSR CDEs and Forms in XML format to a REDCap Data Dictionary:
  • The transformation utility converts a single or multiple Form represented in XML to REDCap compatible csv format
    • for CDE XML, the file may contain multiple CDEs
    • for CRF XML, the file can contain one or more form per transform, please select the correct version of the utility below
  • REDxCDEv5

    • Transformation utility to convert caDSR CDE Browser 4.0.5 XML download format into REDCap Data Dictionary as of 2016/10/02
    • Version 5 - 2016-10-27: Change transform to pull Min/Max Value instead of Min/Max Length
    • Version 4 - 2016-10-02: Add CDE ID/Version as "Field Annotation". Export Valid Values in teh same format as exported for CRFs, ensuring that CDE values/choices will be consistent for the same CDE used across studies, whether as a CRFs, or imported as a list of CDEs.
    • Version 3 - 2015-08-05: Change field note to contain the CDE Question Text, the field does not need to be lower-case without spaces, that rule applies only to variable name
    • Version 2.1 - 2015-6-18: Add instruction for customizing Form name, Id and Version
    • Version 2.0 - 2015-6-10: Add a check for existing CDE PV Values. If already a numeric, use existing value. If not, generate a unique value based on the position in the value list.
  • REDxCRFV10