Figure 1

Joints and entheses included in ultrasound composite scores. Illustration depicts joints (circles) and entheses (arrows) included in the 68-joint/14-entheses score, and the bilateral 22-joint/4-entheses (PsASon22) and the unilateral 13-joint/2-entheses composite scores (PsASon13). For the unilateral score the dominant site is investigated (for example, the right site as shown in the figure). Solid circles indicate that both, palmar and dorsal sites (suprapatellar, medial and lateral scans for the knee) are assessed, whereas striped circles mark sites investigated by dorsal scans only.