Figure 1From: The value of ultrasonography in predicting arthritis in auto-antibody positive arthralgia patients: a prospective cohort studyArthritis development of individual joints. During yearly follow-up visits, development of arthritis in any of 44 joints was independently confirmed by two investigators. The percentage of all arthritic joints in which arthritis developed in that particular joint is shown. Grey bars represent the right sided joints, black bars the left sided joints. AC, acromioclavicular; IP, interphalangeal; MCP, metacarpal phalangeal; MTP, metatarsophalangeal; PIP, proximal interphalangeal; SC, sternoclavicular.Back to article page