Abstract text (incl. references and figure legends)
Introduction：
As aging society is progressing, the opportunity of treating acetabular fractures in the elderly is increasing. Besides, healthy life expectancy is getting longer. The purpose of this study is to compare the characteristics of fracture patterns and the complication rate of open reduction and internal fixation in early and late elderly patients
Material and Methods：
Out of 94 cases of operatively treated acetabular fractures from November 2011 to September 2022, 38 cases of the elderly older than 65 years were investigated. The early elderly group (E) was defined as ranging from 65 to 74, and the late elderly group (L) was defined as older than 75 years. The sex, the number of comorbidity, waiting durations for surgeries, fracture pattern (Judet Letournel classification), and the final physical status were investigated. The t-test and Mann-Whitney test were used to compare both groups statistically.
Results:
The number of cases was 22 cases in group E and sixteen cases in group L. The average age was 69 in E and 83.7 in L (p<0.05), and the number of comorbidities was 0.72 in E and 1.3 in E (p<0.05). The waiting period for surgery was 11.6 days in E and 10.6 in L (p>0.05). In fracture morphology, anterior column with posterior hemi transverse fracture that is reportedly frequent in the elderly was 36.3% (8/22) in E and 50% (8/16) (p>0.05). The fracture with impaction around the joint surface was observed in 45.4% (10/22) in E and 81.2% (13/16) in L(p<0.05). The complication occurred in 6 cases in E (infection, abdominal hernia, and DVT with 2cases each) and one case in L (traumatic osteoarthritis). The patients with walking ability were 50% (11/22) in E and 19%(3/16) in L (p<0.05).
Conclusion:
Compared with the early elderly, late elderly patients had more comorbidities and impaction around the joint. The physical status after surgeries in the late elderly was inferior to the early elderly.
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