Comparative efficacy of double and triple arthrodesis in adult-acquired flatfoot deformity: a retrospective analysis.

Moreover, when the difference in PTI (healthy side minus affected side) for each plantar region was calculated and compared between the two groups, nominally significant differences were observed for the lateral sole (mean difference: 1.16 N·s/cm2, 95% CI: 0.08 to 2.24, Cohen’s d = 0.958) and entire sole (mean difference: 0.53 N·s/cm2, 95% CI: -0.11 to 1.17, Cohen’s d = 0.718) before correction for multiple comparisons ( P = 0.037 and P = 0.048, respectively; Table 5 ; Fig. 5 ).

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Notably, compared with the double arthrodesis group, the triple arthrodesis required a significantly longer average operative time and showed a tendency toward a longer period to achieve complete fusion, although the latter difference did not reach statistical significance (Table 2 ).

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