同时对总体结果做异质性分析。

Heterogeneity tests for pooled results were performed.

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另外，运用分组荟萃分析和元回归分析探讨异质性的根源。

Sources of heterogeneity were explored through subgroup meta-analyses and meta-regression.

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随机效应分析被用作比较体现出异质性的试验，而固定效应方向则用来比较体现出同质性的试验。

Random-effects analysis was used for comparing trials showing heterogeneity, and fixed-effects analysis was used for comparing trials showing homogeneity.

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