Variable & Recode Definitions

The following resources provide variable definitions and other documentation related to reporting and using SEER and related datasets.

• Behavior Recode for Analysis - definition of the variable and how it was created for each data release.
• Cancer Stage Variables - stage variables based on AJCC and changes to SEER staging definitions over time.
• Cancer Type-Specific Recodes - includes site-specific data item recodes.
• Cause of Death Recode - site groupings based on the International Classification of Diseases.
• Cause-specific Death Classification - for use in cause-specific survival calculations.
• Incidence Site Recode Variables
  • AYA Site Recode - adapted classification scheme for tumors of adolescents and young adults (AYA).
  • Brain/CNS Recode - based on the 2016 World Health Organization Classification of Tumors of the Central Nervous System (CNS).
  • International Classification of Childhood Cancer (ICCC) - definitions based on site and morphology coded according to ICD-O-2 or ICD-O-3.
  • Lymphoma Subtype Recode - based on a classification scheme of lymphoid neoplasms.
  • Rare Cancer Classification - table of recodes for rare cancer sites.
  • Site Recode - major cancer sites based on the primary site and histology.

  SEER Coding & Staging Manuals - codes and coding instructions for SEER data and extent of disease.

  

  SEER is supported by the Surveillance Research Program (SRP) in NCI's Division of Cancer Control and Population Sciences (DCCPS). SRP provides national leadership in the science of cancer surveillance as well as analytical tools and methodological expertise in collecting, analyzing, interpreting, and disseminating reliable population-based statistics.