Relationship between Outerbridge Scale and Chondropathy Femorotibial Joint in Relation to Gender and Age—The Use of 1.5T and 3.0T MRI Scanners

<i>Background and Objective</i>: Magnetic resonance imaging (MRI) enables the effective evaluation of chondromalacia of the knee joint. Cartilage disease is affected by many factors, including gender, age, and body mass index (BMI). The aim of this study was to check the relationship between the severity of chondromalacia of the femoro-tibial joint and age, gender, and BMI assessed with 1.5T and 3.0T MRI scanners. <i>Materials and Methods</i>: The cross-observational study included 324 patients—159 (49%) females and 165 (51%) males aged 8–87 (45.1 ± 20.9). The BMI of study group was between 14.3 and 47.3 (27.7 ± 5.02). 1.5T and 3.0T MRI scanners were used in the study. The articular cartilage of the knee joint was assessed using the Outerbridge scale. <i>Results</i>: The age of the patients showed a significant correlation with Outerbrige for each compartment of the femorotibial joint (Spearman’s rank correlation rho: 0.69–0.74, <i>p</i> < 0.0001). A higher correlation between BMI and Outerbridge was noted in the femur medial (rho = 0.45, <i>p</i> < 0.001) and the tibia medial (rho = 0.43, <i>p</i> < 0.001) than in the femur lateral (rho = 0.29, <i>p</i> < 0.001) and the tibia lateral compartment (rho = 0.34, <i>p</i> < 0.001). <i>Conclusions</i>: The severity of chondromalacia significantly depends on age and BMI level, regardless of gender.