Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing

Abstract The association of irregular sleep schedules with circadian timing and academic performance has not been systematically examined. We studied 61 undergraduates for 30 days using sleep diaries, and quantified sleep regularity using a novel metric, the sleep regularity index (SRI). In the most...

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Autores principales:	Andrew J. K. Phillips, William M. Clerx, Conor S. O’Brien, Akane Sano, Laura K. Barger, Rosalind W. Picard, Steven W. Lockley, Elizabeth B. Klerman, Charles A. Czeisler
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/98978c03a4da4abb894c69dbfb834eb9
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spelling	oai:doaj.org-article:98978c03a4da4abb894c69dbfb834eb92021-12-02T16:06:17ZIrregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing10.1038/s41598-017-03171-42045-2322https://doaj.org/article/98978c03a4da4abb894c69dbfb834eb92017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03171-4https://doaj.org/toc/2045-2322Abstract The association of irregular sleep schedules with circadian timing and academic performance has not been systematically examined. We studied 61 undergraduates for 30 days using sleep diaries, and quantified sleep regularity using a novel metric, the sleep regularity index (SRI). In the most and least regular quintiles, circadian phase and light exposure were assessed using salivary dim-light melatonin onset (DLMO) and wrist-worn photometry, respectively. DLMO occurred later (00:08 ± 1:54 vs. 21:32 ± 1:48; p < 0.003); the daily sleep propensity rhythm peaked later (06:33 ± 0:19 vs. 04:45 ± 0:11; p < 0.005); and light rhythms had lower amplitude (102 ± 19 lux vs. 179 ± 29 lux; p < 0.005) in Irregular compared to Regular sleepers. A mathematical model of the circadian pacemaker and its response to light was used to demonstrate that Irregular vs. Regular group differences in circadian timing were likely primarily due to their different patterns of light exposure. A positive correlation (r = 0.37; p < 0.004) between academic performance and SRI was observed. These findings show that irregular sleep and light exposure patterns in college students are associated with delayed circadian rhythms and lower academic performance. Moreover, the modeling results reveal that light-based interventions may be therapeutically effective in improving sleep regularity in this population.Andrew J. K. PhillipsWilliam M. ClerxConor S. O’BrienAkane SanoLaura K. BargerRosalind W. PicardSteven W. LockleyElizabeth B. KlermanCharles A. CzeislerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrew J. K. Phillips William M. Clerx Conor S. O’Brien Akane Sano Laura K. Barger Rosalind W. Picard Steven W. Lockley Elizabeth B. Klerman Charles A. Czeisler Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
description	Abstract The association of irregular sleep schedules with circadian timing and academic performance has not been systematically examined. We studied 61 undergraduates for 30 days using sleep diaries, and quantified sleep regularity using a novel metric, the sleep regularity index (SRI). In the most and least regular quintiles, circadian phase and light exposure were assessed using salivary dim-light melatonin onset (DLMO) and wrist-worn photometry, respectively. DLMO occurred later (00:08 ± 1:54 vs. 21:32 ± 1:48; p < 0.003); the daily sleep propensity rhythm peaked later (06:33 ± 0:19 vs. 04:45 ± 0:11; p < 0.005); and light rhythms had lower amplitude (102 ± 19 lux vs. 179 ± 29 lux; p < 0.005) in Irregular compared to Regular sleepers. A mathematical model of the circadian pacemaker and its response to light was used to demonstrate that Irregular vs. Regular group differences in circadian timing were likely primarily due to their different patterns of light exposure. A positive correlation (r = 0.37; p < 0.004) between academic performance and SRI was observed. These findings show that irregular sleep and light exposure patterns in college students are associated with delayed circadian rhythms and lower academic performance. Moreover, the modeling results reveal that light-based interventions may be therapeutically effective in improving sleep regularity in this population.
format	article
author	Andrew J. K. Phillips William M. Clerx Conor S. O’Brien Akane Sano Laura K. Barger Rosalind W. Picard Steven W. Lockley Elizabeth B. Klerman Charles A. Czeisler
author_facet	Andrew J. K. Phillips William M. Clerx Conor S. O’Brien Akane Sano Laura K. Barger Rosalind W. Picard Steven W. Lockley Elizabeth B. Klerman Charles A. Czeisler
author_sort	Andrew J. K. Phillips
title	Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
title_short	Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
title_full	Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
title_fullStr	Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
title_full_unstemmed	Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
title_sort	irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/98978c03a4da4abb894c69dbfb834eb9
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Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing

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