*
150
d
150
g
150
52
150
f
*
200
150
150
100
15
20
Rocker Angle ( o )
i
MTP24
200
160
70
50
190
180
170
140
55
60
65
Rocker Angle ( o )
15
20
Rocker Angle ( o )
Hallux
200
180
*
200
200
50
57
62
67
Apex Position (%)
250
210
140
52
Hallux
220
160
*
*
200
220
180
*
*
300
250
h
MTP1
250
100
57
62
67
Apex Position (%)
MTP24
100
15
20
Rocker Angle ( o )
200
100
*
300
*
250
*
*
*
Hallux
300
200
e
MTP1
300
250
100
52
57
62
67
Apex Position (%)
200
c
MTP24
300
250
100
b
MTP1
300
a
55
60
65
Rocker Angle ( o )
70
50
55
60
65
Rocker Angle ( o )
70
Figure 2: The effect of varying apex position (a-c) and rocker angle (d-f) on peak plantar
pressure under the 1st MTP, 2-4th MTH and Hallux in people with diabetes (n = 102). The
symbol * denotes a significant pairwise difference (p < 0.001) between a condition and at
least one of the three other apex positions (plots a-c) or other rocker angle (plots d-f). The
vertical lines illustrate the standard deviations. Plots g-i show the interaction between apex
position and rocker angle (RA = 15° shown as dotted and RA = 20° shown as a dashed line)
for the people with diabetes (black) and also for the healthy individuals (red).
Current Pedorthics | July/August 2019
45