Evidence map›Paper›PMID 31832984›Full record

SynthesisSleep & breathing = Schlaf & Atmung2020

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

Mo'ez Al-Islam E Faris, Haitham A Jahrami, Fatema A Alhayki, Noor A Alkhawaja, Ameera M Ali, Shaima H Aljeeb, Israa H Abdulghani, Ahmed S BaHammam

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Sleep & breathing = Schlaf & Atmung, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers, 10 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed, 10 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

82 citing papers in PubMed, 10 syntheses or guidelines pooled it.

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  18. Intermittent fasting and liver disease: Insights from the Ramadan model.Saudi journal of gastroenterology : official journal of the Saudi Gastroenterology Association · 2026
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22 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Mo'ez Al-Islam E FarisDepartment of Clinical Nutrition and Dietetics, College of Health Sciences/Research Institute of Medical and Health Sciences (RIMHS), University of Sharjah, Sharjah, United Arab Emirates.ORCID http://orcid.org/0000-0002-7970-2616
Haitham A JahramiMinistry of Health, Manama, Bahrain.ORCID http://orcid.org/0000-0001-8990-1320
Fatema A AlhaykiCollege of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Noor A AlkhawajaCollege of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Ameera M AliCollege of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Shaima H AljeebCollege of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Israa H AbdulghaniCollege of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Ahmed S BaHammamDepartment of Medicine, College of Medicine, University Sleep Disorders Center, King Saud University, Box 225503, Riyadh, 11324, Saudi Arabia. ashammam2@gmail.com.ORCID http://orcid.org/0000-0002-1706-6167

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

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, τ

conclusionDuring the month of Ramadan, there is approximately a 1 hour reduction in TST and nearly a 1 point increase in the ESS score.

Indexed as

IslamReligion and MedicineAdultCircadian RhythmCorrelation of DataDisorders of Excessive SomnolenceFastingFemaleHumansMaleSleepCaloric restrictionDiurnal intermittent fastingEpworth sleepiness scale (ESS)Excessive daytime sleepiness (EDS)RamadanTotal sleep time (TST)

Identifiers

PMID31832984

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.