Heart rate responses to autonomic challenges in obstructive sleep apnea.

PLoS One · 2013 · PMC3806804 · PMID 24194842

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showed a trendno p-value reported

Male subjects showed a trend toward higher severity of OSA than females, with a significant difference appearing in oxygen saturation nadir.

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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.