Correlation predicates typically compare some key value in the event, such as a unique trip identifier, with a metric containing the same key.

关联谓词通常将事件中的某个键值(例如唯一旅行标识符)与包含相同键的度量作比较。

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The paired t test was adopted to compare the intergroup difference of measurement data. Line correlation analysis was applied to dispose the relativity among the indexes.

计量资料组间差异比较采用配对t检验，各指标间的相关性处理采用直线相关分析。

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Then we examine their serum malondialdehyde (MDA) and superoxide dismutase (SOD), compare the difference of MDA and SOD every group, analysis the correlation of MDA and SOD with BMD.

检测各组研究对象的血清丙二醛（MDA）、超氧化物歧化酶（SOD），比较各组之间的MDA、SOD的不同，分析MDA、SOD与BMD的相关性。

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