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).