Who is exposed to secondhand smoke? Self-reported and serum cotinine measured exposure in the U.S., 1999-2006.

Int J Environ Res Public Health · 2009 · PMC2697933 · PMID 19543411

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

a decreasing trendno p-value reported

If the coefficient of the time trend variable is negative and statistically significant, it indicates there was a decreasing trend.

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.