Mean ± standard deviation was reported for continuous data and percentage ± standard deviation for categorical data. To compare categorical data, we utilized a nonparametric test (Kendall Tau B) due to the presence of a percentage of < 5% in one group. Statistical analysis was performed with the SPSS Statistics 18® (SPSS Inc, Chicago, USA) program. We considered p values of < 0.05 to be significant.
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