The insecure airway: a comparison of knots and commercial devices for securing endotracheal tubes.

BMC Emerg Med · 2006 · PMC1483826 · PMID 16723027

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did not reach statistical significanceno p-value reported

Among knots, Magnus and Clove Hitches produced less slippage than the Cow Hitch, but these differences 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.