Item #	Length	Source of Standard	Year Implemented	Version Implemented	Year Retired	Version Retired	Column #
81	2	NAACCR	2018	18			153 - 154

Description

Code for the state of the patient's residence at the time the tumor was diagnosed is a derived (geocoded) variable based on Census Boundary files from 1970, 1980, or 1990 Decennial Census.

Rationale

Populating the GeoLocationID 70/80/90 [351] correctly requires FIPS code for state and not the USPS abbreviations. Also, on rare occasions, the boundaries of states do change (North Carolina and South Carolina border, for example).

Instructions for Coding

This variable is generated through the process of geocoding either during abstracting or at the central registry level. For U.S. residents, this data item stores the county codes issued by the Federal Information Processing Standards (FIPS) publication Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas. The information in this publication is available in Appendix A.
It is recommended that geocoding be performed using the NAACCR geocoder.
It is recommended that all cases diagnosed through 1999 should have a State at DX Geocode 70/80/90 [81] based on 1990 Census.
At a minimum, all cases diagnosed through 1995-1999 should have a geocoded State at DX Geocode 1990 [81]. Some cases, such as those diagnosed in 1999, must have both State at DX Geocode 1990 [81] and State at DX Geocode 2000 [82] codes for proper assignment of the Census Tr Poverty Indicatr [145].
Do not update this item if the patient's residence changes. Store address update information in the affiliated current address data items. Only update based on improved information on the residential address at time of diagnosis.
PO Box address information should not be used to geocode this data item except in the infrequent case when no other address information is available.
If the patient has multiple tumors, the county codes may be different for each tumor.

Codes

01-95	Valid FIPS code
CD	Resident of Canada
US	Resident of United States, NOS (state/commonwealth/territory/possession unknown)
XX	Resident of country other than the United States (including its territories, commonwealths, or possessions) or Canada, and country is known
YY	Resident of country other than the United States (including its territories, commonwealths, or possessions) or Canada, and country is unknown
Blank	Residence unknown; geocoding unsuccessful

Note: For U.S. residents, historically, standard codes are those of the FIPS publication "Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas." These FIPS codes (FIPS 6-4) have been replaced by INCITS standard codes, however, there is no impact on this variable as the codes align with the system the Census used for each decennial census and will automatically be accounted for during geocoding.