Primary peritoneal and ovarian cancers: an epidemiological comparative analysis.

Cancer Causes Control · 2010 · PMC2883093 · PMID 20309725

Europe PMC DOI

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a significant trendno p-value reported

(data not shown) Although a significant trend for decreasing risk of EOC with increasing number of pregnancies was observed, a similar trend was not observed for PPC risk.

also in 9,775 other papers

a decreasing trendno p-value reported

Increasing years of use of OCs or the patch was found to be associated with a decreasing trend for the risk of invasive serous EOC.

also in 47,180 other papers

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.