California Cancer Reporting System Standards, Volume III

Census Tract 2000

IDENTIFIERS

DESCRIPTION

Census tract of address when this tumor was first diagnosed, using the boundaries defined by the U.S. Census Bureau for the Year 2000 Census.

Census tract codes allow central registries to calculate incidence rates for geographical areas having population estimates.  This field allows a central registry to add Year 2000 Census tracts to tumors diagnosed in previous years, without losing the codes in data item 110.

Census tract codes are provided by a vendor that is under contract with the CCR to geocode patient addresses.  If an address and its assigned census tract goes to IPAQ after being returned from the geocoding vendor, the census tract can be changed by an authorized user.  The authorized user should first check with the CCR-approved publicly available address locator, American FactFinder.

LEVELS

Tumors

LENGTH

6

ALLOWABLE VALUES

er212 Census Tract 2000

Census tract codes have a 4-digit basic number and may have a 2-digit suffix.  For example:  Census tract 0145.05 is coded as 014505.

SOURCE

No Census Tract 2000 variable at admission.  Variable created at tumor level.

Computer generate:

UPDATE

1. As census tracts are determined via the geocoding process add to the database, either manually or by computer.

2. Reset Census Tract 2000 to 999993, 999994, 999996 or 999999 (see Source), if TU Addr at DX--No & Street, TU Addr at DX--City, TU Addr at DX--State, TU Addr at DX--Postal Code, or TU County at DX is changed. (Don't reset if only TU_County at DX was changed as a result of geocoding). Allow user to specify that the code should not be reset while manually changing one or more of the preceding fields.

3. If tumors are being relinked and the addresses are identical but one case is tracted and the other is not, the tracted census values should be used.

4. If geocoded values from geocoding vendor are being linked with tumor and the census tract 2000 certainty value returned from the vendor is ‘9’ (census tract not assigned, geocoding attempted), the system will update, upon being linked, a census tract value of ‘999996’ to ‘999997’ or census tract value of  ‘999997’ to ‘999998’.

5. When the variable is created at the tumor level and an address receives a value of  ‘999993’, it is not sent for geocoding at the vendor.  It will be reviewed so as to get better address information that may allow it to be geocoded.

CONSOLIDATED DATA EXTRACT

Yes

INTERFIELD EDITS

IF352 Addr at DX--State, Census Tract

IF433 Census Tract 2000, Census Block 2000

IF435 Census Tract 2000, Census Source

IF436 Census Tract 2000, Census Tr Certainty 2000 (Eureka)

IF442 Census Tract 2000, Census Place

IF1049 Census Tract 2000, State, County at DX

IF1125 Census Tract 2000, State, County, 2000-2009 - RETIRED

HISTORICAL CHANGES