Statistical Analysis of Zygomatic Fracture Focusing on the Causes of Injury

Abstract

　　Zygomatic fracture is one of the major types of facial fracture. Its causes include traffic accidents, reported to be the most frequent cause in previous studies, falls, and sports. However, the causes depend on social background and change over time. We retrospectively reviewed recent cases of zygomatic fracture (375 cases) at our institution between 2013 and 2019 focusing on the causes of injury. We also compared our results with previous reports using residual analysis. The most frequent cause was falls (144 cases, 38.4%) , followed by traffic accidents (110 cases, 29.3%) and sports (55 cases, 14.7%) . The rate of sports was high among younger patients, whereas that of falls was high among elderly patients. Compared with previous reports, the rate of traffic accidents decreased and the rate of falls increased, reflecting the social changes in our country such as the aging society and improved safety of automobiles.