Heterogeneity of Quadriceps Muscle Volume in Knee Osteoarthritis: A Latent Profile Analysis and Its Clinical Implications for Arthroplasty Outcomes.
BACKGROUND Knee osteoarthritis (KOA) is characterized by complex structural and muscular alterations. Quadriceps muscle atrophy is a critical, but heterogeneous feature influencing pain, function, and postoperative recovery. Understanding muscle phenotypes may provide novel insight into disease heterogeneity and guide...