Table 4.

Paired sample t-test.

Groups		Mean	SD	p value
Checkpoint 1	Clinical position/width of Achilles tendon-actual position/width of Achilles tendon	0.54195	0.08251	< 0.001
Checkpoint 2	Clinical position/width of Achilles tendon-actual position/width of Achilles tendon	0.34586	0.06052	<0.001
Checkpoint 3	Clinical position/width of Achilles tendon-actual position/width of Achilles tendon	0.34116	0.07836	<0.001

Checkpoint 1: 10 cm proximal to calcaneal insertion; checkpoint 2: 8 cm proximal to calcaneal insertion; checkpoint 3: 6 cm proximal to calcaneal insertion. SD: standard deviation.