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APPENDIX B
NORMaTIVE DaTa REFERENCED IN PREDICTIVE VaLuES REPORT
Joan A. Finn, D.P.E., Exercise Science Department, Southern Connecticut State University, New
Haven, CT - May 2010
Testing Protocol:
The testing protocol consisted of three 20 second trials using the postural stability testing feature
within the BSD software. During each test trial, the platform gradually became less stable at four
second intervals. The initial stability level was set at level 12 and ended at level 8. Participants
were given a 10 second rest between each of the three trials.
Data analysis:
Statistical tests were carried out using the Statistical Package for the Social Sciences (SPSS, Inc.,
Chicago, IL). Data were analyzed using ANOVAs with age and balance ability as the independ-
ent variables. The Bonferroni post-hoc test was applied as necessary. The confidence level was
set at 0.05.
RESuLTS
Table 1 and Table 2 include descriptive statistics for age and balance independent variables.
Statistical analyses identified significant differences in balance scores for both independent vari-
ables. These differences are included in the text presented after each Table.
Table 1: Stability Index Differences among age Groups
Youngest
Group 1
Age
18-35
Sample Size
N = 50
OSI Average
1.4
OSI SD
0.7
There was a significant mean difference for balance scores between:
1.
Age group 1 and Age group 3
2.
Age group 1 and Age group 4 and
3.
Age group 2 and Age group 4
That is, the youngest subjects were more stable than the third oldest subjects. The youngest sub-
jects were more stable than the oldest subjects. And the second youngest subjects were more
stable than the oldest subjects.
Also, the two youngest groups were similar in their balance stability and the two older groups
were similar in their balance stability.
Sec youngest
Group 2
36-53
N = 52
1.9
1.2
— B-1 —
Third oldest
Oldest
Group 3
Group 4
54-71
72+
N = 50
N = 17
2.3
3.0
1.4
1.0
APPENDIX B
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