Correlation of knee ultrasonography and Western Ontario and McMaster University (WOMAC) osteoarthritis index in primary knee osteoarthritis

Background Knee osteoarthritis (KOA) is the most common cause of a painful joint, and it is associated with significant health economic consequences. About literature, KOA is usually diagnosed according to changes seen on conventional radiography, but the radiographic features of OA do not correlate with its symptoms. Nowadays, ultrasonography is becoming a non-invasive imaging tool for OA in the clinical setting. Thus, the purpose of this study was to evaluate the correlation between musculoskeletal ultrasound (MSK US) and the Western Ontario and McMaster University (WOMAC) osteoarthritis index findings in patients with primary knee osteoarthritis (KOA).