Statistical analysis
In order to examine the quantitative data in terms of having a normal
distribution, we used the Shapiro-Wilk test. The mean standard deviation was
used to describe the individual-personal information and personal
characteristics. We employed the Mann-Whitney test to compare quantitative
variables between the two groups due to abnormal data distribution. Qualitative
data were described in terms of frequency and percentage; and they were analyzed
by the Chi-square or Fisher’s exact test. The Statistical Package for Social
Sciences (SPSS®) version 20 was used for data analysis. A
