National Population Birth-death Ratio 全国人口出生率死亡率
birth- death ratio 生死比率
·2,447,543篇论文数据，部分数据来源于NoteExpress
The odds ratio for preterm delivery with intrapartum kidney stones was 1.8. However, there was no connection found between stones and low birth weight or infant death.
早产与分娩期肾结石的比值比为1.8。但是并没有发现结石与低出生体重儿或婴儿死亡有关。
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