## 4 Discussion  
The results of our study demonstrate that patients who suffered a pelvic ring injury with concomitant injuries had significantly greater amounts of blood units transferred, and the length of their hospital stay was also longer compared to the mean results. Both of the provided outcomes were found to be statistically significant. Moreover, the study showed that BMI has an impact on pelvic ring fracture morphology. Figure 5: **(A)** Comparison of BMI in pelvic fractures with or without polytrauma. (B) Comparison of length of hospital stay in pelvic fractures with or without polytrauma. (C) Comparison of blood transfusion in pelvic fractures with or without polytrauma. (D) Comparison of surgery duration in pelvic fractures with or without polytrauma. \({}^{*}\)\(p\)-value \(<\) 0.005. In our study, we showed that 70% of patients who suffered from pelvic injury were male and 30% were female; these results were in line with many current studies concerning traumatic pelvic injuries. [PERSON] et al. showed that 76.5% of the studied population that suffered from traumatic pelvic injury were males [21]. [PERSON] et al., in their 2020 study on pelvic ring injuries and their association with the Young-Burgess classification, also presented similar conclusions as far as the sex of the patients was concerned. In total, 61% percent of the studied population were male [22]. Another study with a male sample dominance was [PERSON] et al. 's 2016 study, where 60% of patients who suffered from pelvic fractures were male. [PERSON] et al. and [PERSON] et al. provided similar results concerning the prevalence of pelvic fractures with regard to sex. Males accounted for 75% and 72% of the studied population with pelvic fractures, respectively [23; 24]. Regarding blood transfusions, [PERSON] et al. statistically proved, in their study, that patients who suffered from pelvic ring fractures required the highest amount of blood compared to other pelvic fractures [25]. Surprisingly, comparing our results to [PERSON] et al., the mean value of blood units transferred was 1.0 in our facility, whereas in [PERSON] et al., the value was 5.03 [25]. The difference is large, undoubtedly. However, we suspect this may be connected to the regional requirements and standards in blood transfusions. In [PERSON] et al. 's study, there is no description of transfusion criteria. In our study, patients with a hemoglobin level \(<\) 7.0 mg/dL or with anemia symptoms qualified to receive a blood transfusion. Another finding concerning our study is that APC III fractures were found to have a 23% higher amount of blood units transferred compared to APC II-type fractures (0.8 units vs. 1.1 units). Additionally, LC III fractures were shown to require over 105% of blood units transferred (0.7 units vs. 1.5 units) compared to LC II fractures. [PERSON] et al. presented, in their study, that the level of free blood volume found during the CT scan increases with the level of instability of the pelvic ring fracture in the AO/OTA C-types [26]. Not only does this support our findings, but it also indicates the importance of a thorough initial examination in order to establish the injury and associated injuries. Having said that, it is essential to acknowledge that the greater the displacement of the pelvic ring fracture, the higher the chance of severe bleeding and associated abdominal injuries [22; 27]. The severity of the bleeding increasing with the instability of the pelvis is believed to be associated with the disruption of the sacral venous plexus and arterial branches of iliac vessels and the high amount of cancellous bone [26; 27]. The presented results are in line with current knowledge that pelvic ring fractures can be mortal injuries that may require rapid intervention [14; 28; 29; 30]. The findings regarding the Young and Burgess classification and its correlation to BMI are as follows: patients who suffered from an APC III injury had a higher mean BMI than the APC II injury patients (28.9 vs. 29.3). This finding correlates with [PERSON] et al.