2-6 Statistical analysis
The statistical package for social sciences (SPSS) software for Windows
version 18 (IBM Inc., Chicago, IL, USA) was used for data analysis.
Between-group comparison of nominal or the categorical variables was
ascertained with the use of chi-square test or Fisher’s exact test.
After determining normality using the Shapiro-Wilk test, the
between-group comparison of continuous variables was ascertained using
independent sample T or Mann-Whitney U Test (non-normal distribution).
Analysis of covariance (ANCOVA) test was used to determine the mean
change and effect size with the adjustment for sex and age. P-value
<0.05 was considered statistically significant.