Sleep for COVID-19: real-time analysis of all 8 studies

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Sleep COVID-19 studies. Studies analyze sleep quality before infection, and use different definitions of sleep quality. Recent:

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Sep 30	Covid Analysis (Preprint) (meta analysis)	Sleep for COVID-19: real-time meta analysis of 8 studies
	Statistically significant improvements are seen for mortality, hospitalization, recovery, and cases. 8 studies from 8 independent teams in 4 different countries show statistically significant improvements in isolation (7 for the most se..
Jul 21	Jones et al., Sleep Medicine, doi:10.1016/j.sleep.2022.05.369	Public health impact of poor sleep on COVID-19, influenza and upper respiratory infections
	39% lower mortality [p=0.001], 32% lower hospitalization [p<0.0001], and 7% fewer cases [p=0.04]. FinnGen Mendelian randomization study showing higher risk of COVID-19 mortality, hospitalization, and infection with insomnia.
Apr 13	Paul et al., medRxiv, doi:10.1101/2022.04.12.22273792 (Preprint)	Health behaviours the month prior to COVID-19 infection and the development of self-reported long COVID and specific long COVID symptoms: A longitudinal analysis of 1,811 UK adults
	67% improved recovery [p<0.0001]. Retrospective 1,811 COVID-19 patients in the UK, showing lower risk of self-reported long COVID with good sleep quality in the month before infection.
Mar 22	Kim et al., BMJ Nutrition, Prevention & Health, doi:10.1136/bmjnph-2021-000228	COVID-19 illness in relation to sleep and burnout
	17% fewer moderate/severe cases [p=0.03] and 11% fewer cases [p=0.003]. Retrospective 2,884 high-risk healthcare workers in France, Germany, Italy, Spain, UK, and the USA, showing shorter sleep duration associated with increased risk of COVID-19 cases and severity.
Nov 30 2021	Huang et al., Nature and Science of Sleep, doi:10.2147/NSS.S263488	Reduced Sleep in the Week Prior to Diagnosis of COVID-19 is Associated with the Severity of COVID-19
	81% lower severe cases [p=0.02]. Retrospective 164 COVID-19 patients and 188 controls in China, showing the risk of severe cases associated with lack of sleep.
Sep 30 2021	Mohsin et al., Infection and Drug Resistance, doi:10.2147/IDR.S331470	Lifestyle and Comorbidity-Related Risk Factors of Severe and Critical COVID-19 Infection: A Comparative Study Among Survived COVID-19 Patients in Bangladesh
	38% lower severe cases [p<0.0001]. Retrospective 1,500 COVID+ patients in Bangladesh, showing lower risk of severe cases with good sleep.
Jun 18 2021	Li et al., Sleep, doi:10.1093/sleep/zsab138	Poor sleep behavior burden and risk of COVID-19 mortality and hospitalization
	43% lower mortality [p=0.02] and 36% lower hospitalization [p=0.008]. UK Biobank retrospective, 46,535 participants with sleep behavior assessed between 2006 and 2010, showing higher risk of hospitalization and mortality with poor sleep.
Jun 17 2021	Marcus et al., PLOS ONE, doi:10.1371/journal.pone.0253120	Predictors of incident viral symptoms ascertained in the era of COVID-19
	16% fewer symptomatic cases [p=0.0007]. Prospective survey based study with 14,335 participants, showing risk of viral symptoms associated with shorter sleep duration.
Mar 30 2021	Holt et al., Thorax, doi:10.1136/thoraxjnl-2021-217487	Risk factors for developing COVID-19: a population-based longitudinal study (COVIDENCE UK)
	12% fewer cases [p=0.5]. Prospective survey-based study with 15,227 people in the UK, showing reduced risk of COVID-19 cases with 8 hours sleep, with statistical significance when compared with ≥9 hours. NCT04330599. COVIDENCE UK.

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