Statistical analysis
The data are presented as mean ± standard deviation (SD). Statistical
analysis was conducted using Student’s t-test for paired samples,
single-factor analysis of variance (one-way ANOVA) for multi-group data,
and chi-squared test for categorical data. P -values
<0.05 were considered statistically significant. Data were
processed using SPSS 19.0 (IBM, Chicago, IL, USA).