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Figure 4. Cast Shoe. Figure 3. Pressure transducer placement on selected areas of the foot. was calculated for treatments SLW, PTBW, and CS-2. Means and standard deviations were computed for treatments at each transducer site. An analysis of variance for repeated measures was used to determine whether treatment differences were significant within each site. Duncan's test was used for post-hoc analysis of means. A significance level of 0.05 was used for comparisons. Results and Discussion An analysis of variance (Table 1) for mean percent reduction in pressure was highly significant at all sites tested (Figures 5, 6, 7, and 8). Duncan's test was performed to establish which treatments differed. Significant differences were found between the percent reduction in pressure walking in SLW and PTBW as compared to the CS-2 at all sites. No difference was found between SLW and PTBW at any site. The percent pressure reduction using the walker devices was comparable at all the sites tested. This study demonstrated the effectiveness of the short leg and patellar tendon bearing walkers as compared to the cast shoe in reducing plantar pressure on the foot. Since all the devices in this study had the same sole design and insole materials, treatment differences must be attributable to proximal orthotic components including the polyurethane liner, fixed ankle uprights, and Velcro® closures. The SLW and PTBW differed only by the polyeth-
Table I. Analysis of Variance of Percent Pressure Reduction. Figure 5. Percent pressure reduction at the first metatarsal head (1 MTH) walking in cast shoe-2 (CS-2), short leg walker (SLW) and patellar tendon bearing walker (PTBW) compared to walking in cast shoe-1.
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