Chronic cough due to occupational factors.

J Occup Med Toxicol · 2006 · PMC1436005 · PMID 16722562

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did not reach statistical significanceno p-value reported

However, lung function (FVC and FEV1) impairment was positively associated with cigarette smoking cessation but did not reach statistical significance [ 41 ].

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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.