Objective:To analyze the epidemiology of pre-hospital patients from 2015 to 2016in a first-tier city,in order to improve pre-hospital quality and make emergency resources to be optimized rationally.Method:A total of 106 304 calls received from the pre-hospital emergency center of the first-tier city were performed retrospectively from Jul-2015 to Jun-2016.Result:There were 106 304 valid cases included 58 641 males and 47 183 females,the ratio of male to female was 1.24∶1.Age groups of≥75and 25~44accounted f...