Sleep and subjective happiness between the ages 40 and 59 in relation to presbyopia and dry eye.

PLoS One · 2021 · PMC8064542 · PMID 33891599

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may not be significantno p-value reported

Finally, the statistical results obtained with the current study were nominal and clinical relevance may not be significant.

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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.