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Table 3 Differences in foot posture measurements between the groups.

From: Foot posture in people with medial compartment knee osteoarthritis

Measure Control (n = 28) Knee OA (n = 32) p value Effect size (Cohen's d)
Foot posture index† 1.35 ± 1.43 2.46 ± 2.18 0.022* d = 0.61 (medium)
Navicular height 0.24 ± 0.03 0.23 ± 0.03 0.542 d = 0.04 (negligible)
Navicular drop 0.02 ± 0.01 0.03 ± 0.01 0.019* d = 1.02 (large)
Arch index 0.22 ± 0.04 0.26 ± 0.04 0.040* d = 1.02 (large)
  1. Values are reported as mean ± SD.* significant at p < 0.05. † Rasch transformed FPI scores