Statistical analysis
Data were analyzed with SPSS for Windows version 17.0 (SPSS,
Chicago, IL). All parameters are described as mean values ±
SD. We used the analysis of variance (ANOVA) split plot in
time design to assess significant differences between the
groups before and after the training. For the variables that
were not normally distributed, a logarithm was applied to
transform the data. All tests were 2-tailed, and a P value < .05
was considered statistically significant.