Goh GSH, et al. - In this study, the functional outcomes, quality of life and satisfaction rates were compared between octogenarians and age-appropriate controls undergoing primary total knee arthroplasty (TKA) with a minimum follow-up of 2 years. Researchers included a total of 594 individuals aged ≥ 80 years (n = 594) and a propensity score-matched cohort of 594 patients aged 65-74 years who underwent primary TKA at a single institution. This study investigated the range of motion, clinical outcome scores and satisfaction rates at 6 months and 2 years. They further recorded revision rates. Compared with younger controls, octogenarians undergoing TKA had a relatively lower rate of satisfaction and clinically meaningful recovery. Although, elderly individuals still experienced a successful result after surgery. It is indicated that the clinical trajectory outlined may help clinicians give valuable prognostic information to elderly individuals and guide preoperative counselling.