Correlation of lower limb alignment with medial mensical extrusion in knee osteoarthritis

Background This study aims to explore the relationship between Lower limb alignment parameters and the degree of Medial Meniscal Extrusion (MME) in patients with Knee Osteoarthritis (KOA), in hopes of providing new reference data for the prevention and treatment of KOA. Methods A retrospective study design was employed, analyzing 623 KOA patients treated at our hospital from 2022 to 2023, with 307 patients' information collected according to inclusion and exclusion criteria. Patients were divided into mild and severe groups based on the degree of MME, and differences in Lower limb alignment parameters between the two groups were compared. Univariate analysis, Pearson correlation analysis, and multivariate stepwise regression analysis were used, along with Receiver operating characteristic(ROC) curve assessment to evaluate the predictive value of Lower limb alignment parameters on the degree of MME. Results Univariate analysis showed significant correlations between Anatomic Mechanical Axis (AMA), Joint Line Convergence Angle (JLCA), mechanical Lateral Distal Femur Angle (mLDFA), Medial Proximal Tibia Angle (MPTA), and the degree of MME (P