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Ohkusa, Y., Sugawara, T., Taiguchi, K., Okabe, N., Moriya, K., Yoshimura, A., Yamaguchi, K., Nagao, K., Suetsugu, M., Furukawa, T. and Hirako, T. (2013) Analysis about Age Distribution of Influenza Patients in Saga Prefecture. Kosei No Shihyo, 60, 25-29. (In Japanese)

has been cited by the following article:

• TITLE: Retrospective Evaluation for ORCA Surveillance Comparison with Prescription Surveillance

  AUTHORS: Tomoaki Ueno, Tamie Sugawara, Yasushi Ohkusa, Hirokazu Kawanohara, Miwako Kamei

  KEYWORDS: ORCA Surveillance, Prescription Surveillance, Influenza, Real-Time Daily Surveillance, Preciseness

  JOURNAL NAME: Journal of Biosciences and Medicines, Vol.7 No.12, December 2, 2019

  ABSTRACT: Background: “Online Receipt Computer Advantage” (ORCA) surveillance, an online medical claim service produced and provided freely to medical facilities by the Japan Medical Association, has been available for public use since 2010. However, its preciseness has not been evaluated. The object of the present study is comparison with ORCA surveillance and prescription surveillance (PS), which is the most reliable daily surveillance for influenza nationwide in Japan, and evaluating preciseness of ORCA surveillance. Method: We specifically examined influenza as a targeted disease. We regarded PS as the gold standard daily real-time monitoring system for influenza nationwide and for each prefecture. This study assesses correlation and discrepancies between ORCA and PS results for influenza nationwide and by prefecture. Results: Nationwide, the correlation coefficient of PS and ORCA was 0.9653; the discrepancy rate was 27%. Among prefectures, results show that Mie and Fukui prefectures had two quite similar epidemic curves. Conclusion: Results demonstrate that ORCA surveillance is comparable to PS nationwide. However, some prefectures exhibited comparable results whereas others did not. ORCA surveillance cannot break down to the municipal level.