California Cancer Reporting System Standards Volume I: Abstracting and Coding Procedures
The usual (longest-held) occupation and industry of workers can reveal the national cancer burden by industry and occupation. Such information can also be used to help discover jobs that may have a high risk for cancer or other diseases and for which prevention efforts can be concentrated (or targeted).
Enter any available information about the kind of work performed (e.g., television repairman, chemistry teacher, bookkeeper, construction worker) associated with the longest held occupation. This field may contain up to 100 characters.
Avoid the use of abbreviations where possible.
If the patient is not employed, try to determine the longest held occupation.
Do not enter a term such as "homemaker", "student", "retired", "unemployed", or "disabled" unless no other information can be obtained.
If no information is available, enter "NR" (not recorded). Do not leave this field blank.
Please refer to http://www.cdc.gov/niosh/docs/2011-173/