For continuous data we calculated a weighted mean difference.

对于连续变项我们计算加权的平均值差异。

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Continuous data were analysed using weighted mean difference (WMD).

连续数据的分析使用加权均数差(WMD)。

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Standard methods of the Neonatal Review Group with use of relative risk (RR), risk difference (rd) and weighted mean difference (WMD).

新生儿评价组的标准方法，使用相对危险度(RR)，风险差(RD)和加权均数差(WMD)。

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Standard methods of the Neonatal Review Group with use of relative risk (RR), risk difference (rd) and weighted mean difference (WMD).

新生儿评价组的标准方法，使用相对危险度(RR)，风险差(RD)和加权均数差(WMD)。

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