Sherman AE, et al. - This study presented the results of elective total hip arthroplasty (THA) in nonagenarians and centenarians. Applying the 2008-2017 American college of surgeons-national quality improvement program, researchers designed a retrospective cohort of patients undergoing primary THA. They applied propensity scores to test 858 individuals aged 90 or older to 858 individuals aged 65 to 89, controlling for demographic factors and comorbidities. Using multiple regression modeling, they compared thirty-day results between matched age cohorts. While nonagenarians and centenarians were significantly more likely to experience urinary tract infection, this study observed statistically equivalent 30-day rates of surgical infection, pneumonia, deep venous thrombosis/thrombophlebitis, pulmonary embolism, stroke, myocardial infarction, cardiac arrest, and sepsis between matched age cohorts. Total hip arthroplasty was found to be a safe and viable treatment modality beyond the ninth decade of life. It was considered that patient comorbidity profiles, rather than age, should principally guide shared clinical decision making.