Effect of a concussion on subsequent baseline SCAT performance in professional rugby players: a retrospective cohort study in global elite Rugby Union.

BMJ Open · 2020 · PMC7430463 · PMID 32792442

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may be significantno p-value reported

It may be significant that balance sub-modes, unlike symptom endorsement or cognitive performance, can be neither learnt, practiced nor biassed by subjective reporting.

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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.