Maximal mid-expiratory flow is a surrogate marker of lung clearance index for assessment of adults with bronchiectasis.

Sci Rep · 2016 · PMC4919685 · PMID 27339787

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did not reach statistical significanceno p-value reported

The overall changes were small (within 5% of baseline levels) and did not reach statistical 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.