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 Session
Mean (±SD) |
2nd Session
Mean (±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
