Effect of diurnal fasting on sleep during Ramadan: a systematic review and meta-analysis
Purpose The 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. Methods Databases (Scopus, ScienceDirect, ProQuest Medical, PubMed/MEDLINE, Web of Science, EBSCOhost, Cochrane, CINAHL,...
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| Published in: | Sleep & breathing Vol. 24; no. 2; pp. 771 - 782 |
|---|---|
| Main Authors: | , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Cham
Springer International Publishing
01-06-2020
Springer Nature B.V |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Purpose
The 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.
Methods
Databases (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.
Results
We 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, τ
2
= 0.15,
I
2
= 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, τ
2
= 0.13,
I
2
= 76%,
P
value = 0.001).
Conclusion
During the month of Ramadan, there is approximately a 1 hour reduction in TST and nearly a 1 point increase in the ESS score. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 ObjectType-Review-4 content type line 23 ObjectType-Undefined-3 |
| ISSN: | 1520-9512 1522-1709 |
| DOI: | 10.1007/s11325-019-01986-1 |