Codability of industry and occupation information from cancer registry records: Differences by patient demographics, casefinding source, payor, and cancer type

Author(s): Silver, SR; Tsai, RJ; Morris, CR; Boiano, JM; Ju, J; Scocozza, MS; Calvert, GM | Abstract: © 2018 Wiley Periodicals, Inc. Introduction: Industry and occupation (IaO) information collected by cancer registries is useful for assessing associations among jobs and malignancies. However, systematic differences in IaO availability can bias findings. Methods: Codability by patient demographics, payor, identifying (casefinding) source, and cancer site was assessed using IaO text from first primaries diagnosed 2011-2012 and reported to California Cancer Registry. IaO were coded to a U.S. Census code or classified as blank/inadequate/unknown, retired, or not working for pay. Results: Industry was codable for 37% of cases; 50% had “unknown” and 9% “retired” instead of usual industry. Cases initially reported by hospitals, covered by preferred providers, or with known occupational etiology had highest codable industry; cases from private pathology laboratories, with Medicaid, or diagnosed in outpatient settings had least. Occupation results were similar. Conclusions: Recording usual IaO for retirees and improving linkages for reporting entities without patient access would improve IaO codability and research validity.