Table 2. Session means, standard deviations (SD), intraclass correlation coefficient (ICC), standard error of mean (SEM), minimal detectable changes (MDC) for Biodex® Stability System scores.
Outcome Type Stance & Outcome 1st SessionMean (±SD) 2nd SessionMean (±SD) p ICC 95% CI SEM MDC
Best Score Dual Limb OSI (°) 1.7 (1.18) 1.32 (.85) <.01 .80 .44-.92 .89 2.47
Dual Limb APSI(°) 1.2 (.78) .95 (.56) <.01 .80 .45-.92 .59 1.64
Dual Limb MLSI (°) .91 (.75) .69 (.53) <.03 .75 .45-90 .61 1.69
Single Limb OSI (°) 1.63 (1.27) 1.40 (1.24) .34 .63 .28-.83 1.37 3.80
Single Limb APSI (°) 1.21 (.93) 1.05 (.98) .43 .58 .44-.91 1.09 3.02
Single Limb MLSI (°) .89 (.75) .68 (.57) .08 .68 .20-.81 .69 1.91
Average Score Dual Limb OSI (°) 2.53 (2.07) 1.61 (1.18) <.01 .67 .17-.87 1.82 5.04
Dual Limb APSI (°) 1.81 (1.4) 1.15 (.76) <.01 .65 .13-.87 1.24 3.44
Dual Limb MLSI (°) 1.41 (1.26) .88 (.75) <.01 .67 .21-.87 1.11 3.08
Single Limb OSI (°) 2.09 (1.64) 1.77 (1.50) .06 .88 .71-.95 1.06 2.94
Single Limb APSI (°) 1.61 (1.24) 1.38 (1.15) .09 .88 .71-.95 .80 2.22
Single Limb MLSI (°) 1.08 (.85) .87 (.75) <.03 .86 .64-.94 .58 1.61
OSI: Overall Stability Index, APSI: Anterior/Posterior Stability Index, MLSI: Medial/Lateral Stability Index