Ultrasound imaging in patients with hip pain and suspected hip osteoarthritis: an inter-rater and intra-rater reliability study.

This study demonstrated substantial to almost perfect reliability on the most common ultrasound findings related to hip osteoarthritis and osteoarthritis grading. Agreement on the grade of osteoarthritis between ultrasound and X-ray was moderate. Overall, these results support ultrasound imaging as a reliable tool in the assessment of hip osteoarthritis.