Changes in Hospital Admissions for Facial Fractures During and After Covid 19 Pandemic: National Multicentric Epidemiological Analysis on 2,938 Patients.

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Abstract
Purpose: the purpose of this study was to retrospectively analyze the clinical records of patients admitted for maxillo-facial fracture to 18 Italian center, evaluating the epidemiological differences between the different phases of the SARS-CoV-2 pandemic. Methods: This is a retrospective study on patients who underwent surgery for facial bone fractures in 18 maxillo-facial surgery deparments in Italy, from February 23, 2020 to February 23, 2022. According to the date of admission, all the data were stratified in four chronological periods encompassing the four different moments in terms of restriction in Italy: pre-pandemic, first wave, partial restrictions and post-pandemic groups. Differences in epidemiological data between the groups were analysed. Results: 2,938 patients were included. There was a statistically significant difference in the cause of hospitalization between pre-pandemic and first wave groups (p=0.005) and between pre-pandemic and partial restriction groups (p=0.002). The differences between the pre- and post-pandemic groups where instead not significant (p=0.106). Compared to the pre-pandemic period, the number of Black patients was significantly higher during the first wave and the post-pandemic period. Differences between the periods in terms of gender, age, type of fracture, treatment modality, and length of hospital stay were not found to be statistically significant. Conclusions: during the COVID-19 pandemic there have been profound changes in the epidemiology of fractures influenced by the restrictive measures implemented by the government. At the end of the pandemic, the epidemiology of fractures returned to being the same as in the pre-pandemic period.Purpose: the purpose of this study was to retrospectively analyze the clinical records of patients admitted for maxillo-facial fracture to 18 Italian center, evaluating the epidemiological differences between the different phases of the SARS-CoV-2 pandemic. Methods: This is a retrospective study on patients who underwent surgery for facial bone fractures in 18 maxillo-facial surgery deparments in Italy, from February 23, 2020 to February 23, 2022. According to the date of admission, all the data were stratified in four chronological periods encompassing the four different moments in terms of restriction in Italy: pre-pandemic, first wave, partial restrictions and post-pandemic groups. Differences in epidemiological data between the groups were analysed. Results: 2,938 patients were included. There was a statistically significant difference in the cause of hospitalization between pre-pandemic and first wave groups (p=0.005) and between pre-pandemic and partial restriction groups (p=0.002). The differences between the pre- and post-pandemic groups where instead not significant (p=0.106). Compared to the pre-pandemic period, the number of Black patients was significantly higher during the first wave and the post-pandemic period. Differences between the periods in terms of gender, age, type of fracture, treatment modality, and length of hospital stay were not found to be statistically significant. Conclusions: during the COVID-19 pandemic there have been profound changes in the epidemiology of fractures influenced by the restrictive measures implemented by the government. At the end of the pandemic, the epidemiology of fractures returned to being the same as in the pre-pandemic period.

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