Oral food challenge management in Japan: A retrospective analysis of health insurance claims data

system in Japan, the findings may not apply to other regions or dif-ferent healthcare systems. In conclusion, OFCs are conducted nationwide in general hospitals and clinics, not only in allergy- specialized facilities, as part of daily medical services in Japan. The proportion of anaphylaxis during OFC was relatively low, and there were no life- threatening events in both clinics and hospitals, as exemplified by the low number of adrenaline injections. There were also no life- threatening events during the procedure. However, we should still be very careful when performing OFC in patients with a history of anaphylaxis and wheezing.