Riddle, D.L. and Dumenci, L. 2024. Letter to the Editor: Using KOOS-PS to validate dichotomous global ratings of improvement or worsening following total knee arthroplasty. Acta Orthopaedica. 95, (Dec. 2024), 746–747. DOI:https://doi.org/10.2340/17453674.2024.42632.