A population- based epidemiological and health economic analysis of fracture-related infection

Aims The aim of this study was to perform the first population - based description of the epidemiological and health economic burden of fracturerelated infection (FRI). Methods This is a retrospective cohort study of operatively managed orthopaedic trauma patients from 1 January 2007 to 31 December 2016, performed in Queensland, Australia. Record linkage was used to develop a person- centric, population - based dataset incorporating routinely collected administrative, clinical, and health economic information. The FRI group consisted of patients with International Classification of Disease 10th Revision diagnosis codes for deep infection associated with an implanted device within two years following surgery, while all others were deemed not infected. Demographic and clinical variables, as well as healthcare utilization costs, were compared. Results There were 111,402 patients operatively managed for orthopaedic trauma, with 2,775 of these (2.5%) complicated by FRI. The development of FRI had a statistically significant association with older age, male sex, residing in rural/remote areas, Aboriginal or Torres Strait Islander background, lower socioeconomic status, road traffic accident, work- related injuries, open fractures, anatomical region (lower limb, spine, pelvis), high injury severity, requiring soft- tissue coverage, and medical comorbidities (univariate analysis). Patients with FRI had an eight - times longer median inpatient length of stay (24 days vs 3 days), and a 2.8 - times higher mean estimated inpatient hospitalization cost (AU$56,565 vs AU$19,773) compared with uninfected patients. The total estimated inpatient cost of the FRI cohort to the healthcare system was AU$156.9 million over the ten - year period. Conclusion The results of this study advocate for improvements in trauma care and infection management, address social determinants of health, and highlight the upside potential to improve prevention and treatment strategies.