Role of Maternal Periodontitis in Preterm Birth.

Front Immunol · 2017 · PMC5303728 · PMID 28243243

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highly significantno p-value reported

Several studies ( 47 , 109 – 111 ) found a highly significant association between PTB and moderate to severe periodontitis.

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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.