Ultrasonography findings of 282 Achilles tendons
| No clinical Achilles enthesitis (n=194) | Clinical Achilles enthesitis (n=88) | p Value | |
| Inflammatory activity | 31 (16.0) | 15 (17.0) | 0.82 |
| Hypoechogenicity | 10 (5.2) | 7 (8.0) | 0.36 |
| Tendon thickening | 27 (13.9) | 10 (11.4) | 0.56 |
| Power Doppler activity | 2 (1.0) | 1 (1.1) | 1.00 |
| Structural damage | 100 (51.5) | 48 (54.5) | 0.64 |
| Calcifications | 77 (39.7) | 35 (39.8) | 0.99 |
| Enthesophytes | 51 (26.3) | 26 (29.5) | 0.57 |
| Erosions at tendon insertion | 4 (2.1) | 0 (0) | 0.31 |
| Inflammatory activity and/or structural damage | 112 (57.7) | 56 (63.6) | 0.35 |
According to X2 test or Fischer's exact test as appropriate. Data are displayed as n (%).