Additional file 1 of Characteristics of patients who received helicopter emergency medical services in Japan from 2012 to 2019: a retrospective analysis of data from Tochigi Prefecture

Additional file 1. Table S1: Demographics and clinical characteristics of patients across different modes and types of transport. This data represents the 5163 patient cases treated by the Tochigi Helicopter Emergency Medical Services. In addition to Table 2 in the main text, the different characteristics of patients who were transported to the base hospital and to other hospitals are further described in this data. Table S2: Demographics and characteristics of patients (N = 2924) transported to the base hospital by the Tochigi helicopter emergency medical service. This is the data of 2924 cases of patients transported to the base hospital. In addition to Table 2 in the main text, short-term clinical outcomes are described in this data. Table S3: International variations of backgrounds and outcomes of helicopter emergency medical services. This data briefly summarizes international reports of the backgrounds and outcomes of helicopter emergency medical services.