Retrospective evaluation of efficiency and safety of an anterior percutaneous approach for cervical discectomy.

Asian Spine J · 2014 · PMC4149983 · PMID 25187857

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a clear trendno p-value reported

Whereas there was only a clear trend in favor of surgery in terms of disability and arm pain reduction, statistical significance was reached for neck pain reduction.

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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.