组间差异显著性比较采用t检验。
分析前后二次问卷配对数据的相关性和差异显著性。
The correlation and differences between the paired data were analyzed for their statistical significance.
最后结果采用统计方法进行描述性分析和差异显著性检验。
Descriptive analysis and difference significance test of statistics method were adopted in finally result analysis.
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