In the study, "Trends in Complications and Outcomes in Patients Aged 65 and Younger Undergoing Total Hip Arthroplasty: Data from the American Joint Replacement Registry," the team used the Registry's database to identify all THA procedures performed from 2012 through 2020 in patients aged 18 to 65. Exclusion criteria included patients with revision and oncologic THA cases, conversion from prior surgery and non-elective cases. The study measured primary outcomes including cumulative revision rate, 90-day readmission rate and reason for revision. In total, 5,153 patients were included in the analysis (51% female and 49% male) with an average age of 56.7 years ± 7.8 years. Mean follow up was 39.57 months.