Objective To analyze influencing factors of patients' stay in emergency rescue room (ERR) of a tertiary A hospital in Shanghai and provide reference suggestions for

further optimizing administration and making policies. Methods Data of ERR of a tertiary A hospital in Shanghai from Jan. 2013 to Jun. 2014 were collected and retrospectively analyzed. Univariate and multivariate analyses were adopted to identify major influencing factors of patients' stay in ERR. Results A total of 8 746 patients were enrolled. The mean time of stay in ERR was 17.04 h and the median time of stay in ERR was 5 h. The results of analyses showed that major influencing factors of stay in ERR were age, gender, time of patients being sent in and out of ERR, consciousness of patients being sent in ERR, visit quarter, destination of transfer, and administrative measures. Conclusion The patients' stay in ERR is gradually improved and administrative measures are somewhat

effective. It is necessary to explore more effective measures according to relevant influencing factors.