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Table 3 Test statistics of the relative Midfoot Index (RMI) to define a cut-off value to differentiate between healthy and diseased (PPV: Positive Predictive Value, NPV: Negative Predictive Value)

From: Facilitating the interpretation of pedobarography: the relative midfoot index as marker for pathologic gait in ankle osteoarthritic and contralateral feet

RMI <0.9 <0.8 <0.7 <0.6 <0.5
PPV 0.68 0.80 0.99 0.98 1
NPV 0.64 0.64 0.59 0.46 0.42
Sensitivity 0.91 0.78 0.60 0.33 0.2
Specifity 0.27 0.67 0.99 0.99 1