The incidence of infection after posterior cervical spine surgery: a 10 year review.

Global Spine J · 2012 · PMC3864478 · PMID 24353939

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did not reach statistical significanceno p-value reported

This is the largest study of its kind with 90 patients; however, several study factors 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.