Thinner knee cartilage (73.9%), average knee cartilage is 2.20 ± 0.41 mm, joint effusion detected on ultrasound: 58.3%, X-ray: 7.2%, clinical: 14.4%, average number of translations on ultrasound has 8.06 ± 3.67 mm, the rate of detecting joint effusion on ultrasound is higher than in clinical and X ray significance with p < 0.01.