Temporal trends of preterm birth in Shenzhen, China: a retrospective study.

Reprod Health · 2018 · PMC5851155 · PMID 29534760

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an increasing trendno p-value reported

Conclusions In summary, the Shenzhen findings confirm the previous reports of an increasing trend for PTB rates in mainland China.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.