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。

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We can't say for sure: remember, this study just measures correlations, and a correlation can't tell us if one factor causes another.

这一点我们不能确定：要知道，这项研究仅仅是测量一种相关性，而这种相关性并不能告诉我们一个因素是由另一个因素导致的。

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Fasting serum leptin level closely correlated with insulin resistance in obese subjects and it was the main correlation factor of insulin resistance, but the relationship only existed in male.

肥胖者空腹血清瘦素水平与胰岛素抵抗密切相关，是胰岛素抵抗的主要相关因素，而这一关系仅在男性中存在。

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With an understanding based only on correlation and not causality, we challenge mix modelers to rationally explain where their long-term factor comes from (whatever value it is) and by what mechanism or how it becomes actual, longer-term consumer purchases.

FORBES: The Downside Of Marketing Mix Models Is There's No Upside For CMOs