Effects of prolonged working hours on heart rate variability in internal medicine physicians.

Sci Rep · 2022 · PMC9633695 · PMID 36329110

Europe PMC DOI

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a nonsignificant trendno p-value reported

Nevertheless, there was a nonsignificant trend toward increased LF/HF ratio during post-call as compared to pre-call workday.

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an increasing trendno p-value reported

Total power in less sleep group had an increasing trend post-call day which could be due to PNS activation.

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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.