The Circadian Clock, the Brain, and COVID-19: The Cases of Olfaction and the Timing of Sleep

Herz, Rachel S.; Herzog, Erik D.; Merrow, Martha; Noya, Sara B.

doi:10.1177/07487304211031206

Cited by 1 publication

(1 citation statement)

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“…Another study using actigraphy found that patients with severe COVID-19 symptoms, including those with severe respiratory symptoms and those requiring Intensive Care Unit (ICU) displayed lower sleep efficiency, higher immobility time, and higher fragmentation index compared to those with mild symptoms and who do not require ICU care ( 55 ). Actigraphy may not be the gold standard for evaluating sleep, but it is simple to implement and could be sufficient for identifying changes in sleep schedules that would indicate disturbances of the circadian clock ( 56 ).…”

Section: Discussionmentioning

confidence: 99%

Sleep disturbance in post COVID-19 conditions: Prevalence and quality of life

et al. 2023

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Post COVID-19 conditions are complaints and symptoms in patients with a history of probable or confirmed COVID-19 after 3 months of the onset of COVID-19 and last at least 2 months. About 10–20% of people may experience post COVID-19 conditions, one of which is sleep disturbance. There is a wide range of prevalence of sleep disturbances from 6% to more than 70%. An online survey of the post COVID-19 conditions in various countries showed that 78.58% of subjects had sleep disturbances, including insomnia, sleep-disordered breathing, central disorders of hypersomnolence, circadian rhythm sleep-wake disorders, parasomnias, and sleep-related movement disorders. Sleep disturbance can be found starting from 2 weeks until 48 weeks or more after discharge or after having a negative COVID-19 test results. Women aged < 50 years old with severe COVID-19 infection reported a worse outcome. Several mechanisms may cause sleep disturbance in post COVID-19 condition, namely persistent viral infection and inflammation, immunity dysregulation, and mitochondrial dysfunction. Several studies discovered sleep disturbance was a major problem that affected different domains of QoL in post COVID-19 conditions. Significant correlation was found between several dimensions of SF-36 with moderate-to-severe insomnia in post COVID-19 conditions. Therefore, sleep disturbance is a major problem in post COVID-19 conditions and may affect patients' QoL, and the existence of sleep disturbance should be a concern in post COVID-19 conditions period. Further research is required to determine the prevalence based on agreed definition as well as methods to assess this condition and its impact on QoL.

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Section: Discussionmentioning

confidence: 99%