Fig. 1From: Effects of the establishment of trauma centres on the mortality rate among seriously injured patients: a propensity score matching retrospective studyFlow diagram of our study. A total of 431 patients were enrolled and divided into either the “before trauma centre” group (n = 172, admitted from January 2016 to December 2018) or the “after trauma centre” group (n = 259, admitted from January 2019 to December 2021)Back to article page