Secondly, we wished to report differences in mortality rates between revision and primary surgeries.

其次，我们希望报告初次手术和手术翻修患者死亡率的不同。

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Secondly, we chose to compare mortality rates of primary and revision arthroplasty.

其次，我们选择比较首次全髋置换和关节翻修的死亡率。

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Secondly, we chose to compare mortality rates of primary and revision arthroplasty.

其次，我们选择比较首次全髋置换和关节翻修的死亡率。

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