Hazardous cosleeping environments and risk factors amenable to change: case-control study of SIDS in south west England.

BMJ · 2009 · PMC2762037 · PMID 19826174

Europe PMC DOI

hedged sentence

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highly significantno p-value reported

A previous highly significant risk factor was SIDS infants with bedding over their head or face.

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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.