Single-factor correlation, multiple-factor regression, gradual regression and covariance analysis were adopted for correlation analysis among variables.
各变量间相关分析用单因素相关分析、多因素回归和逐步回归分析。
Among dependency analysis methods, the traditional linear correlation coefficient can only describe the linear dependencies between variables.
相依性分析方法中，传统的线性相关系数只能描述变量间的线性相依关系。
Univariate linear correlation analysis was used for comparison among the variables.
变量间采用单因素直线相关分析。
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