Statistical analysis
Demographic data was presented by descriptive statistics.
A Chi-square test was applied to compare fall frequencies
between the baseline and 1-year period by per-protocol and
intention-to-treat analysis methods. Balancing abilities, quality
of life scores (SF-36), and FES at baseline and 1 year after
were compared by paired t-test. Factors associated with falls
were analyzed using a Chi-square test or Fisher’s exact test
for qualitative data. Multiple logistic regression was used to
analyze the confounding factors. A P-value of #0.05 was
considered statistically significant. Analyses were performed
using PASW statistic 18 (SPSS Inc, Chicago, IL).