Statistical analysis
All statistical analyses were performed using IBM SPSS Statistics
(Version 22.0. Armonk, NY: IBM Corp.) software. A p-value of
<0.05 was considered statistically significant. Demographic
data were presented as frequencies and percentages, and continuous
variables were presented as mean and standard deviation (SD). For the
descriptive analyses, mean and SD were used for continuous variables,
and percentages for categorical variables.