Particulate matter air pollution and respiratory symptoms in individuals having either asthma or chronic obstructive pulmonary disease: a European multicentre panel study.

Environ Health · 2012 · PMC3509003 · PMID 23039312

Europe PMC DOI

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of borderline significanceno p-value reported

When all participants were included in the analysis as a total, we found that a 10 μg/m 3 increase in PM 10 was significantly associated at the nominal level with shortness of breath in the lag 1 whilst the association in the lags 2 and 0 to 6 was of borderline significance.

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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.