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Data Standards and Data Dictionary

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The NAACCR Standards Implementation Timeline provides deadlines to facilitate successful implementation of revisions to NAACCR Standards for Cancer Registries, Data Standards and Data Dictionary. Revisions to the standards include, but are not limited to, changes to existing data items and proposing new data items for implementation.

NAACCR Data Standards and Data Dictionary Version 24 Implementation Timeline
Activity MLTG Deadlines Comments
Proposed requests for new data items and revisions requiring field testing submitted to the Mid-Level Tactical Group (MLTG). Note: most new and some changed data items require field testing. July 1, 2022 Data items approved by MLTG will be sent to the Uniform Data Standards Work Group (UDS WG) for preliminary review
Field testing initiated.
Note: MLTG is currently evaluating the field testing process
October 1, 2022 NAACCR will facilitate field testing
Proposed requests for changes to existing data items that do not require field testing submitted to MLTG for final review. Other planned changes (e.g., staging, ICDO-3.2, SSDI schemas, etc.) reported to MLTG. October 1, 2022 MLTG may elect to require field test on changes*
MLTG informs the High-Level Strategic Group (HLSG) of all planned changes for 2024. January 1, 2023
MLTG transmits new proposed standards to UDS WG for final review and approval. January 1, 2023 UDS will review all information provided
Field test results reported to MLTG. March 1, 2023
HLSG reviews/approves changes to be implemented in 2024. April 1, 2023
HLSG/MLTG transmits new standards approved for implementation to UDS WG April 1, 2023 UDS updates NAACCR Data Standards and Data Dictionary
Standard setters provide their requirements for the Data Standards and Data Dictionary, Required Status Table Chapter 8) and the Reportability table (Chapter 3). May 1, 2023
UDS WG final review/approval June 1, 2023
UDS WG submits NAACCR Data Standards and Data Dictionary, Version 24 to the Standardization and Registry Development Steering Committee for review/approval June 15, 2023
NAACCR Data Standards and Data Dictionary, Version 24 Released July 1, 2023

*Changes to existing data items that result from experience in collecting the data, questions received from registrers or reliability studies generally will not require field testing. However, changes to codes made for other reasons may require field testing to ensure that the new codes and coding instructions can be accurately applied in registry settings. Change requests made in October that the MLTG determine need to be field tested may postpone the implementation year.

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