Birth outcomes and prenatal exposure to ozone, carbon monoxide, and particulate matter: results from the Children's Health Study.

Environ Health Perspect · 2005 · PMC1310931 · PMID 16263524

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borderline significantno p-value reported

(2002) observed a borderline significant inverse association between ambient O 3 levels and birth weight in term infants born in Washoe County, Nevada, between 1991 and 1999.

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borderline significanceno p-value reported

However, the second-trimester PM 10 results became stronger and achieved borderline significance.

also in 7,017 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.