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Table 2 Reliability of the foot posture measurements.

From: Foot posture in people with medial compartment knee osteoarthritis

Measures Session 1 mean ± SD Session 2 mean ± SD ICC3,1(95% CI) 95% LoA CV (%)
Foot posture index† 1.33 ± 1.47 1.46 ± 1.33 0.91 (0.82 to 0.96) 1.44 to -1.88 24
Navicular height 0.24 ± 0.03 0.23 ± 0.03 0.86 (0.71 to 0.94) 0.04 to -0.03 6
Navicular drop 0.01 ± 0.01 0.01 ± 0.01 0.56 (0.20 to 0.79) 0.02 to -0.02 38
Arch index 0.21 ± 0.04 0.21 ± 0.04 0.93 (0.84 to 0.97) 0.03 to -0.03 5
  1. NB: ICC - intraclass correlation coefficient; LoA - 95% limit of agreement; CV - coefficient of variation. † Rasch transformed FPI scores