Postoperative radiotherapy is associated with improved survival in pT1-2N1 oral and oropharyngeal cancer without adequate neck dissection.

Radiat Oncol · 2021 · PMC7788971 · PMID 33407647

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failed to reach statistical significanceno p-value reported

The protective effect of adjuvant radiotherapy failed to reach statistical significance for those with LN yield ≥ 18.

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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.