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Effect of diurnal fasting on sleep during Ramadan: a systematic review and meta-analysis

Effect of diurnal fasting on sleep during Ramadan: a systematic review and meta-analysis PurposeThe current meta-analysis aimed to obtain a more stable estimate of the effect size of Ramadan diurnal intermittent fasting (RDF) on sleep duration and daytime sleepiness.MethodsDatabases (Scopus, ScienceDirect, ProQuest Medical, PubMed/MEDLINE, Web of Science, EBSCOhost, Cochrane, CINAHL, and Google Scholar) were searched from database inception to the end of June 2019. The sleep quality measures analyzed were excessive daytime sleepiness (EDS) measured by the Epworth sleepiness scale (ESS) and total sleep time (TST). Subgroup analyses for age, sex, and levels of physical activity were conducted.ResultsWe identified 24 studies (involving 646 participants, median age 23.7 years, 73% men) conducted in 12 countries from 2001 to 2019. The results revealed that TST decreased from 7.2 h per night [95% confidence interval (CI) 6.7–7.8] before Ramadan to 6.4 h (95% CI 5.3–7.5) during Ramadan, while the ESS score increased slightly from 6.1 (95% CI 4.5–7.7) before Ramadan to 7.0 (95% CI 5.2–8.8) during Ramadan. Effect sizes on sleep quality measures during RDF demonstrated a moderate reduction in TST (number of studies, K = 22; number of subjects, N = 571, Hedges’ g value of −0.43, 95% CI − 0.64 to −0.22, Q = 90, τ2 = 0.15, I2 = 78%, P < 0.001), while ESS score showed negligible effect on EDS (K = 9, N = 362, Hedges’ g value of −0.06, 95% CI −0.43 to 0.28, Q = 21, τ2 = 0.13, I2 = 76%, P value = 0.001).ConclusionDuring the month of Ramadan, there is approximately a 1 hour reduction in TST and nearly a 1 point increase in the ESS score. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Sleep and Breathing Springer Journals

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Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2019
Subject
Medicine & Public Health; Pneumology/Respiratory System; Otorhinolaryngology; Dentistry; Neurology; Internal Medicine; Pediatrics
ISSN
1520-9512
eISSN
1522-1709
DOI
10.1007/s11325-019-01986-1
Publisher site
See Article on Publisher Site

Abstract

PurposeThe current meta-analysis aimed to obtain a more stable estimate of the effect size of Ramadan diurnal intermittent fasting (RDF) on sleep duration and daytime sleepiness.MethodsDatabases (Scopus, ScienceDirect, ProQuest Medical, PubMed/MEDLINE, Web of Science, EBSCOhost, Cochrane, CINAHL, and Google Scholar) were searched from database inception to the end of June 2019. The sleep quality measures analyzed were excessive daytime sleepiness (EDS) measured by the Epworth sleepiness scale (ESS) and total sleep time (TST). Subgroup analyses for age, sex, and levels of physical activity were conducted.ResultsWe identified 24 studies (involving 646 participants, median age 23.7 years, 73% men) conducted in 12 countries from 2001 to 2019. The results revealed that TST decreased from 7.2 h per night [95% confidence interval (CI) 6.7–7.8] before Ramadan to 6.4 h (95% CI 5.3–7.5) during Ramadan, while the ESS score increased slightly from 6.1 (95% CI 4.5–7.7) before Ramadan to 7.0 (95% CI 5.2–8.8) during Ramadan. Effect sizes on sleep quality measures during RDF demonstrated a moderate reduction in TST (number of studies, K = 22; number of subjects, N = 571, Hedges’ g value of −0.43, 95% CI − 0.64 to −0.22, Q = 90, τ2 = 0.15, I2 = 78%, P < 0.001), while ESS score showed negligible effect on EDS (K = 9, N = 362, Hedges’ g value of −0.06, 95% CI −0.43 to 0.28, Q = 21, τ2 = 0.13, I2 = 76%, P value = 0.001).ConclusionDuring the month of Ramadan, there is approximately a 1 hour reduction in TST and nearly a 1 point increase in the ESS score.

Journal

Sleep and BreathingSpringer Journals

Published: Jun 12, 2020

References