尽管造成围产儿死亡的原因存在争议，但荷兰的围产儿死亡率是全欧洲最高的国家之一。
The Dutch perinatal mortality rate is one of the highest in Europe, though the cause is contested.
其次，我们选择比较首次全髋置换和关节翻修的死亡率。
Secondly, we chose to compare mortality rates of primary and revision arthroplasty.
结果： 全髋置换后的30天内的总体死亡率为0.24%（18/7478）。
The overall mortality rate at 30 days after THA was 0.24% (18 of 7478).
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