Balance System Statistic Definitions - biodex BALANCE SYSTEM SD Operation & Service Manual

CONTENTS

BaLaNCE SYSTEM STaTISTIC DEFINITIONS

Stability Index: Represents the variance of platform displacement in degrees from level. A high
number is indicative of the patient having trouble balancing. The patient's Actual Stability Index
is represented in the Postural Stability, Athletic Single Leg and Fall Risk Report under the col-
umn labeled "Actual Score." The Actual Score can be compared to age related Predictive Score,
this is found to the immediate left of the Actual Score under the column labeled "Predictive
Values." Should your patient's Actual Values not fit into the range of the Predictive Values there
maybe a balance problem. Bilateral comparisons can be made to determine progress made dur-
ing rehabilitation on the Comparative Report (see Figure 9-2).
Anterior/Posterior Stability Index: Represents the variance of platform displacement in degrees
from level for motion in the sagittal plane.
Medial/Lateral Stability Index: Represents the variance of platform displacement in degrees from
level for motion in the frontal plane.
Standard Deviation: The amount of variability in the statistical measure. A low standard deviation
demonstrates that the range of values from which the mean was calculated were close together.
DATA — 10-2 —