A population-based study of attention deficit/hyperactivity disorder symptoms and associated impairment in middle-aged adults.

PLoS One · 2012 · PMC3275565 · PMID 22347487

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closest p

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did not reach statistical significanceno p-value reported

However, in some cases the difference between strata I and IV did not reach statistical significance, probably because there are very few individuals in stratum IV.

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highly significantno p-value reported

Importantly, associations were highly significant even when few ADHD symptoms were reported.

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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.