In this study, the majority of patients with trauma admitted to the emergency room were young and middle-aged, and there were significantly more men than women (2.51:1), which was consistent with that of relevant literature reports [14–16]. The difference in sex composition among all age groups was statistically significant, indicating that acute trauma was closely related to the social division of labour and social occupations between men and women. Middle-aged and young men were the main force in social labour participation and also the main force engaged in jobs with higher risk coefficients; therefore, the risk of trauma was higher. In addition, road traffic accidents are a leading cause of injuries in developing countries [17, 18]. Shanghai, a relatively developed city in China, has a high population density, dense roads, and a huge demand for human flow and logistics, which also increases the potential risk of trauma. Regarding trauma prevention, we should first strengthen the publicity of enterprise labour and road safety and improve the safety awareness among citizens. Second, relevant departments should consider young and middle-aged men, especially workers, drivers, and construction operators, as the main groups for trauma prevention and treatment strategies. Additionally, these departments should improve the safety protection facilities in the industry to reduce the occurrence of traumatic events.
In this study, the occurrence of trauma varied with seasons and time periods, indicating that the occurrence of trauma is affected by factors such as lifestyle and production, seasons, and environmental temperature changes, which is consistent with the findings of studies from other countries [16, 19, 20]. In this study, the hospitalisation peak of patients with trauma in the emergency room occurred from July to October, which may be related to the following aspects: (1) the occurrence of trauma is highly correlated with meteorological elements, and the increase in temperature and sunshine duration increases the incidence of accidental trauma [20–22]; (2) when the relative humidity is 50–70%, the risk of trauma is highest [21]. Summer is the peak season for construction, and high humidity and busy construction in the south during summer are potential factors for an increase in trauma. (3) Summer vacation and National Day holidays increase travel and traffic, increasing the incidence of accidental trauma. Emergency admissions were more common between 11:00 and 21:00 every day, with the peak between 16:00 and 17:00, which differed from the findings of other studies [16, 23, 24]. This may be because Shanghai, an economically developed immigrant metropolis, has different working hours and social activity rules than other areas. The peak time of the above trauma occurred during the evening rush hour, with heavy traffic and people flow. In addition, residents in this area frequently went out at night; the phenomenon of working overtime at night was common, and the travel rate increased, all of which led to an increased incidence of trauma. Therefore, hospital management departments should rationally allocate emergency room medical resources according to trauma treatment laws to guarantee the quality and efficiency of trauma treatment.
Emergency detention time refers to the time between patients reaching the emergency room and being shifted out of the emergency room. Studies have shown that the duration of emergency stay is closely related to the prognosis of patients with trauma. As the duration of emergency stay is prolonged, the incidence of sepsis in patients with trauma increases [25], and the duration of hospital stay of patients is also prolonged [26]; the duration of emergency stay is positively correlated with increased mortality in patients with severe trauma [27, 28]. In this study, the detention time of patients with trauma in the emergency room of our hospital showed a prolonged trend from 2013 to 2021, which was consistent with relevant literature reports [29, 30]. In the United States, the average wait time for non-critical patients in emergency rooms increased by 33% between 2003 and 2006 and has not improved in recent years [31]. This indicates that, with the increase in emergency department visits, the prolonged detention time of patients in emergency rooms has gradually become a prominent problem worldwide, especially in China, a populous country. The clinical data of 13,313 patients with trauma in our hospital were retrospectively analysed, and 72.2% of the patients stayed in the emergency room for more than 3 hours. Additionally, the proportion of patients staying in the emergency room gradually increased with increasing age. Advanced age is an independent risk factor for a prolonged stay in the emergency room [13] because elderly patients have decreased physiological reserves, many underlying diseases, and are often complicated with multi-system severe diseases. Atypical clinical manifestations of disease in older adults can complicate assessment and management. This suggests that emergency medical staff should pay attention to the detention of patients with trauma, especially elderly patients, and suggest introducing clinical assistants or trauma coordination nurses into existing emergency services, which may be a good way to improve the efficiency of trauma treatment and reduce the detention of patients in emergency rooms [32, 33].
This study found that age was an independent risk factor for death in patients with trauma in the emergency room, and the risk of death was significantly increased in patients older than 60 years. This may be related to organ function decline in elderly patients, weakened resistance, increased individual brittleness, susceptibility to serious trauma after external impact, and high incidence of traumatic shock and coagulation disease [34, 35]. In this study, the risk of death in the emergency room of patients with somnolence, confusion, and coma was 3.814, 4.955, and 22.344 times that of patients with consciousness, respectively (P = 0.004, P < 0.001, P < 0.001). This suggests that consciousness on admission is a risk factor for death in the emergency rooms of patients with trauma, which is consistent with the findings of previous studies [36, 37]. As a coma score for initial injury, multiple studies have shown that the lower the Glasgow Coma Scale (GCS), the higher the fatality rate [36, 38], and GCS ≤ 12 on admission is an independent risk factor for death in hospitals for patients with traumatic brain injury (TBI) [39]. These results indicate that the consciousness state of patients on admission reflects the severity of patients’ injuries to some extent, and emergency medical staff can preliminarily judge the degree of risk of death of patients with trauma through consciousness and then take different intensities and individualised treatment measures.
Hypotension is a risk factor for increased mortality in patients with trauma, and while systolic blood pressure < 90 mmHg is considered the hypotension threshold, recent studies have suggested redefining hypotension at higher levels in patients with trauma [40]. Brown et al. [41] substituted a systolic blood pressure of < 110 mmHg for the current systolic blood pressure < 90 mmHg, which is beneficial for older patients and potentially valuable for all adult patients in field triage. In addition, studies have investigated the relationship between systolic blood pressure and mortality in patients with traumatic brain injury, showing that pre-hospital systolic blood pressure < 110 mmHg is significantly correlated with in-hospital mortality, and the optimal hypotension threshold for patients ≤ 60 years old and > 60 years old is 100 mmHg and 120 mmHg respectively [42, 43]. This study showed that the risk of death in the emergency room of patients with systolic blood pressure < 110 mmHg was significantly higher than that of patients with a systolic blood pressure of 110–169 mmHg (OR = 2.363, P < 0.001). Patients with diastolic blood pressure < 59 mmHg and those with diastolic blood pressure > 90 mmHg had 2.086 and 1.874 times greater risk of death, respectively, than those with normal diastolic blood pressure (P < 0.001). In conclusion, age > 60 years, unconsciousness upon admission, systolic blood pressure < 110 mmHg, diastolic blood pressure, and abnormal heart rate were independent risk factors for death in the emergency room, suggesting that emergency medical staff should focus on these factors when treating patients and evaluating the factors influencing prognosis.
Limitations
This was a single-centre retrospective study without long-term follow-up. The risk factors of death in patients with acute trauma are relatively complex, and the type of trauma, time from injury to admission, trauma severity score, and physiological indicators were not included in this study. Therefore, a multicentre, prospective study is needed to improve the data and obtain more convincing data to provide a reference for emergency treatment and prognostic evaluation of patients with trauma.