著者

Etsuji Okamoto

出版者

日本疫学会

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.24, no.1, pp.77-83, 2014-01-05 (Released:2014-01-05)

参考文献数

10

被引用文献数

4 18

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Background: Japan’s National Database (NDB) includes data on health checks and health insurance claims, is linkable using hash functions, and is available for research use. However, the linkage rate between health check and health insurance claims data has not been investigated.Methods: Linkage rate was evaluated by comparing observed medical and pharmaceutical charges among health check recipients in fiscal year (FY) 2009 (N = 21 588 883) with expected charges from the same population when record linkage was complete. Using the NDB, observed charges were estimated from the first published result of linking health check recipients in FY2009 and their health insurance claims in FY2010. Expected charges were estimated by combining 3 publicly available datasets, including data from the Medical Care Benefit Survey and an ad-hoc report by the Japan Health Insurance Association.Results: Only 14.9% of expected charges were linked by the NDB. The linkage rate was higher for women than for men (18.2% vs 12.4%) and for elderly adults as compared with younger adults (>25% vs <10%).Conclusions: The linkage rate in the NDB was so low that any research linking health check and health insurance claims will not be reliable. Causes for the low linkage rate include differences between health check and health insurance claims data in name format (eg, insertion of a space between family and given names) and date of birth (Japanese vs Gregorian calendar). Investigation of the causes for the low linkage rate and measures for improvement are urgently needed.

著者

Etsuji Okamoto Kiyotaka Kikuchi Ginji Endo

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.13-0067-BR, (Released:2013-09-10)

被引用文献数

2 7

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Objectives: The aim of this study was to assess the risk of developing bile duct cancer among workers in the printing industry in comparison with workers in all industries in general. Methods: Prevalence of bile duct cancer was compared between workers in the printing industry and age-standardized controls in all other industries using the claims database of the Japan Health Insurance Association, which insures workers of small-medium sized employers of all industries. Results: Young (aged 30-49) male workers in the printing industry showed an elevated but insignificant standardized prevalence rate ratio (SPRR) for bile duct cancer in comparison with workers in all other industries (SPRR, 1.78; 95%CI,0.63-5.00). The risk was higher for intrahepatic bile duct cancer but remained insignificant (SPRR,3.03; 95%CI,0.52-17.56). Conclusions: The sharply elevated risk of bile duct cancer observed among proof-printing workers of a printing factory in Osaka may not be generalizable to workers in the printing industry nationwide.