Sleep quality and the evolution of the COVID-19 pandemic in five European countries.

PLoS One · 2022 · PMC9797060 · PMID 36576928

Europe PMC DOI

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highly significantno p-value reported

As we expected, the estimate attracted is negative and highly significant: the more lethal the pandemic was between April 2020 and June 2021, the lower the sleep quality of the respondents of our estimation sample.

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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.