Editing Sleep debt (section)

== Sleep debt and mortality ==

Several studies have shown that sleep duration, specifically sleep deficit or shorter sleep duration, predicts mortality, whether it be on weekdays or weekends.<ref name=":1" /> In people aged 65 years and younger, daily sleep duration of 5 hours or less (amounting to a sleep deficit of 2 hours per day) during weekends correlated with a 52% higher mortality rate—as compared to a control group who slept for 7 hours.<ref name=":1">{{cite journal | vauthors = Åkerstedt T, Ghilotti F, Grotta A, Zhao H, Adami HO, Trolle-Lagerros Y, Bellocco R | title = Sleep duration and mortality - Does weekend sleep matter? | journal = Journal of Sleep Research | volume = 28 | issue = 1 | pages = e12712 | date = February 2019 | pmid = 29790200 | doi = 10.1111/jsr.12712 | pmc = 7003477 | doi-access = free }}</ref> Consistent weekday sleep debt exhibited a detrimental association with mortality and morbidity, but this effect was negated when compensated with long sleep during weekends.<ref name=":1" /><ref>{{Cite journal|last1=Grandner|first1=Michael A.|last2=Hale|first2=Lauren|last3=Moore|first3=Melisa|last4=Patel|first4=Nirav P.|date=June 2010|title=Mortality associated with short sleep duration: The evidence, the possible mechanisms, and the future|journal=Sleep Medicine Reviews|language=en|volume=14|issue=3|pages=191–203|doi=10.1016/j.smrv.2009.07.006|pmc=2856739|pmid=19932976}}</ref> However, the harmful consequences of sleep debt over weekdays and weekends were not seen in individuals aged 65 years and older.<ref name=":1" />