U.S. and Puerto Rico Data Variable Definition and Frequency

U.S. Cancer Statistics Public Use Database

The following variables are available in the U.S. Cancer Statistics Public Use Database, U.S. and Puerto Rico data (2005–2018). They are listed by SEER*Stat category. Click on the variable name for more information, including the source, description, and considerations for use.

Please note that the frequencies were created with Malignant Behavior unselected on the SEER*Stat Selection tab.

Age at Diagnosis

Sex, Year of Diagnosis, and Registry

Site and Morphology

Stage – Local, Regional, Distant (LRD) [Summary and Historic]


Extent of Disease – Collaborative Stage (CS)

Multiple Primary Fields


Merged System-Supplied