Table 2: Definition of the modified x-ray signs investigated in this study.
| Kager's sign (K) | As described in Table 1. |
| Disruption (D) | Disruption to the appearance of the Achilles tendon. |
| Loss of parallelism (P) | Loss of parallelism between the tendon and skin. |
| Fusiform (F) | An appearance of a fusiform swelling of the tendon (thickening of the tendon). |