我们以得自观察性试验的结果作为参照组，检验已发表的估计值，了解其对胜算比的比值(ROR)是否具有较大或较小的影响。

Using results from observational studies as the reference group, we examined the published estimates to see whether there was a relative larger or smaller effect in the ratio of odds ratios (ROR).

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对于连续性的结果变项使用标准化或加权的平均值差异来分析处理资料，而对二分的结果变项则使用胜算比与95%信赖区间来分析处理资料。

Standardised or weighted mean differences were used to pool data for continuous outcomes and odds ratios were used to pool data for dichotomous outcomes, together with 95% confidence intervals.

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